BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Date iCal//NONSGML kigkonsult.se iCalcreator 2.18// METHOD:PUBLISH X-WR-CALNAME;VALUE=TEXT:KIAA Events Calendar X-WR-TIMEZONE:Asia/Shanghai BEGIN:VTIMEZONE TZID:Asia/Shanghai X-LIC-LOCATION:Asia/Shangha BEGIN:STANDARD DTSTART:19791021T033000 TZOFFSETFROM:+0800 TZOFFSETTO:+0800 TZNAME:CST END:STANDARD END:VTIMEZONE BEGIN:VEVENT UID:1946@kiaa.pku.edu.cn DTSTAMP:20211118T193116Z CREATED:20211118T193116Z DESCRIPTION:《天问》01 DTSTART;TZID=Asia/Shanghai:20191115T190000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20211118T193116Z LOCATION: SUMMARY:《天问》第一讲 URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cnimages/ih1_large.jpg END:VEVENT BEGIN:VEVENT UID:1632@kiaa.pku.edu.cn DTSTAMP:20200103T103000Z CREATED:20200103T103000Z DESCRIPTION:Host: Prof. Zheng Cai DTSTART;TZID=Asia/Shanghai:20200103T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20200103T103000Z LOCATION: SUMMARY:TBA URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1632.htm END:VEVENT BEGIN:VEVENT UID:1631@kiaa.pku.edu.cn DTSTAMP:20200109T140000Z CREATED:20200109T140000Z DESCRIPTION:I will first motivate the need to conduct massive spectroscopic surveys to learn about the 3D distribution of galaxies. From these measurements we can then derive important parameter on the distributi... DTSTART;TZID=Asia/Shanghai:20200109T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20200109T140000Z LOCATION: SUMMARY:Massive Spectroscopic Surveys & Fibre Positioner Robots URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1631.htm END:VEVENT BEGIN:VEVENT UID:1630@kiaa.pku.edu.cn DTSTAMP:20200227T140000Z CREATED:20200227T140000Z DESCRIPTION:From rotation curves to the large scale structure, the evidences of the existence of dark matter appear in various scale of our universe. But its particle physics natures are still mysterious to us. P... DTSTART;TZID=Asia/Shanghai:20200227T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20200227T140000Z LOCATION: SUMMARY:Searching for particle nature of dark matter URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1630.htm END:VEVENT BEGIN:VEVENT UID:1629@kiaa.pku.edu.cn DTSTAMP:20200305T140000Z CREATED:20200305T140000Z DESCRIPTION:It has been more than one century since the discovery of cosmic rays in 1912. The origin of these energetic particles is still a matter of debate. Great advances have been achieved on cosmic ray measu... DTSTART;TZID=Asia/Shanghai:20200305T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20200305T140000Z LOCATION: SUMMARY:The Origin of Cosmic Rays URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1629.htm END:VEVENT BEGIN:VEVENT UID:1628@kiaa.pku.edu.cn DTSTAMP:20200312T140000Z CREATED:20200312T140000Z DESCRIPTION:I will introduce several new LSS analysis methods that we are working on. 1) The tomographic Alcock-Paczynski method, which overcomes the RSDs via looking at the redshift evolution, and is capable of ... DTSTART;TZID=Asia/Shanghai:20200312T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20200312T140000Z LOCATION: SUMMARY:New Methods for Cosmic Large-Scale Structure Analysis URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1628.htm END:VEVENT BEGIN:VEVENT UID:1627@kiaa.pku.edu.cn DTSTAMP:20200319T160000Z CREATED:20200319T160000Z DESCRIPTION:Searching for the most distant objects is important. Due to the limited time before the observed epoch, these objects can put the most stringent constraint on the structure formation in the Universe. ... DTSTART;TZID=Asia/Shanghai:20200319T160000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20200319T160000Z LOCATION: SUMMARY:Chasing the most distant objects URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1627.htm END:VEVENT BEGIN:VEVENT UID:1626@kiaa.pku.edu.cn DTSTAMP:20200326T160000Z CREATED:20200326T160000Z DESCRIPTION:From 2009 to 2014, the Baryon Oscillation Spectroscopic Survey (BOSS) used the SDSS telescope to obtain spectra of 1.5 million galaxies to get very accurate measurements of the Baryon Acoustic Oscilla... DTSTART;TZID=Asia/Shanghai:20200326T160000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20200326T160000Z LOCATION: SUMMARY:Studying the Expansion of the Universe with quasar spectra URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1626.htm END:VEVENT BEGIN:VEVENT UID:1625@kiaa.pku.edu.cn DTSTAMP:20200402T140000Z CREATED:20200402T140000Z DESCRIPTION:Planetary nebulae (PNe) are descendants of the low- and intermediate-mass stars (about 1-8 solar masses), which account for the absolute majority (>90%) of stellar populations in the universe. As an ... DTSTART;TZID=Asia/Shanghai:20200402T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20200402T140000Z LOCATION: SUMMARY:Planetary Nebulae as Probes of Stellar and Galactic Evolution URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1625.htm END:VEVENT BEGIN:VEVENT UID:1624@kiaa.pku.edu.cn DTSTAMP:20200409T140000Z CREATED:20200409T140000Z DESCRIPTION:The link between the intergalactic medium (IGM) and galaxies is a key to understand the evolution of baryonic matter and galaxies. Although several observations have identified the presence of IGM-gal... DTSTART;TZID=Asia/Shanghai:20200409T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20200409T140000Z LOCATION: SUMMARY:Environmental dependence of galactic properties traced by Lyα forest absorption URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1624.htm END:VEVENT BEGIN:VEVENT UID:1623@kiaa.pku.edu.cn DTSTAMP:20200416T140000Z CREATED:20200416T140000Z DESCRIPTION:The galaxy intrinsic alignment (IA) is both a major source of systematic errors in weak lensing cosmology, and an emerging tracer of the large scale structure of the Universe. Separating IA from weak ... DTSTART;TZID=Asia/Shanghai:20200416T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20200416T140000Z LOCATION: SUMMARY:Revealing the galaxy intrinsic alignment with self-calibration URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1623.htm END:VEVENT BEGIN:VEVENT UID:1622@kiaa.pku.edu.cn DTSTAMP:20200423T140000Z CREATED:20200423T140000Z DESCRIPTION:Spicules are rapidly evolving fine-scale jets of magnetized plasma in the solar chromosphere. It remains unclear how these prevalent jets originate from the solar surface and what role they play in he... DTSTART;TZID=Asia/Shanghai:20200423T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20200423T140000Z LOCATION: SUMMARY:Generation of solar spicules and subsequent coronal heating URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1622.htm END:VEVENT BEGIN:VEVENT UID:1621@kiaa.pku.edu.cn DTSTAMP:20200507T160000Z CREATED:20200507T160000Z DESCRIPTION:At high redshift most of the baryons reside outside galaxies, in an intricated network of sheets, filaments and knots, also known as the Cosmic Web. The direct detection of this large-scale gas struct... DTSTART;TZID=Asia/Shanghai:20200507T160000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20200507T160000Z LOCATION: SUMMARY:From halo to intergalactic medium: directly constraining the properties of large-scale gas around high-redshift quasars URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1621.htm END:VEVENT BEGIN:VEVENT UID:1620@kiaa.pku.edu.cn DTSTAMP:20200521T140000Z CREATED:20200521T140000Z DESCRIPTION:Dark matter halos are approximately virialized condensation of dark matter and serve as the building blocks of large scale structure and galaxy formation. These structures, however, are not fully in e... DTSTART;TZID=Asia/Shanghai:20200521T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20200521T140000Z LOCATION: SUMMARY:The quasi-equilibrium structure of dark matter halos: from theory to observation URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1620.htm END:VEVENT BEGIN:VEVENT UID:1619@kiaa.pku.edu.cn DTSTAMP:20200528T160000Z CREATED:20200528T160000Z DESCRIPTION:In the Milky Way there exists a significant population of old and metal-rich stars on highly eccentric orbits, most likely born in-situ. It is not 100% clear how this in-situ halo population came abou... DTSTART;TZID=Asia/Shanghai:20200528T160000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20200528T160000Z LOCATION: SUMMARY:The Biggest Splash URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1619.htm END:VEVENT BEGIN:VEVENT UID:1618@kiaa.pku.edu.cn DTSTAMP:20200604T140000Z CREATED:20200604T140000Z DESCRIPTION:The circumgalactic medium and feedback processes significantly affect galaxy evolution and are an interesting and hot topic in contemporary astronomy. I will talk about our recent work on this topic i... DTSTART;TZID=Asia/Shanghai:20200604T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20200604T140000Z LOCATION: SUMMARY:The Circumgalactic Medium and Fermi bubbles in the Milky Way URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1618.htm END:VEVENT BEGIN:VEVENT UID:1617@kiaa.pku.edu.cn DTSTAMP:20200611T140000Z CREATED:20200611T140000Z DESCRIPTION:Dwarf galaxies play a fundamental role in our understanding of galaxy formation and cosmology. The LCDM has been proven successful in reproducing many observational properties, especially at large sca... DTSTART;TZID=Asia/Shanghai:20200611T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20200611T140000Z LOCATION: SUMMARY:Small galaxies, big challenges URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1617.htm END:VEVENT BEGIN:VEVENT UID:1739@kiaa.pku.edu.cn DTSTAMP:20200716T100000Z CREATED:20200716T100000Z DESCRIPTION:人类在宇宙中是否孤独？行星系统与生命如何交织成和谐乐章？旗舰级航天任务中有哪些重大的基础问题与应用基础问题？在上述问题背景下，我国学者提出“觅音”——宜居行星搜寻计划。通过分阶段实施“觅音”计划，预期... DTSTART;TZID=Asia/Shanghai:20200716T100000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20200716T100000Z LOCATION: SUMMARY:“觅音”——宜居行星搜寻计划介绍 URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1739.htm END:VEVENT BEGIN:VEVENT UID:1616@kiaa.pku.edu.cn DTSTAMP:20200917T090000Z CREATED:20200917T090000Z DESCRIPTION:Despite tremendous recent progress, gaps remain in our knowledge of our cosmic history. For example, we have yet to make direct observations of Cosmic Dawn or the subsequent Epoch of Reionization. Tog... DTSTART;TZID=Asia/Shanghai:20200917T090000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20200917T090000Z LOCATION: SUMMARY:The Past, Present, and Future of 21cm Cosmology URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1616.htm END:VEVENT BEGIN:VEVENT UID:1738@kiaa.pku.edu.cn DTSTAMP:20200922T103000Z CREATED:20200922T103000Z DESCRIPTION:Magnetars have magnetic field up to 10^15 G. The ultra-strong magnetic field has profound implications for the mechanical, thermal and radiative evolution of magnetars. In this talk, I will discuss th... DTSTART;TZID=Asia/Shanghai:20200922T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20200922T103000Z LOCATION: SUMMARY:Magnetodynamics inside and outside magnetars URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1738.htm END:VEVENT BEGIN:VEVENT UID:1615@kiaa.pku.edu.cn DTSTAMP:20200924T160000Z CREATED:20200924T160000Z DESCRIPTION:Atmospheric escape is an important process in the evolution of exoplanet atmospheres, especially those orbiting very close to their host stars. However, many aspects of atmospheric escape remain poorl... DTSTART;TZID=Asia/Shanghai:20200924T160000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20200924T160000Z LOCATION: SUMMARY:Probing the Dynamics and Magnetic Fields of Extended Exoplanet Atmospheres URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1615.htm END:VEVENT BEGIN:VEVENT UID:1737@kiaa.pku.edu.cn DTSTAMP:20200925T103000Z CREATED:20200925T103000Z DESCRIPTION:As a wideband, large-field-of-view radio telescope, the Canadian Hydrogen Intensity Mapping Experiment (CHIME) is a revolutionary new telescope designed to provide answers to three major questions in ... DTSTART;TZID=Asia/Shanghai:20200925T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20200925T103000Z LOCATION: SUMMARY:The CHIME telescope: probing of Dark Energy, Fast Radio Bursts and the Gravitational Wave Background URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1737.htm END:VEVENT BEGIN:VEVENT UID:1614@kiaa.pku.edu.cn DTSTAMP:20201015T140000Z CREATED:20201015T140000Z DESCRIPTION:Cosmic rays (CRs) is one of the most important component in the interstellar medium (ISM) in our Galaxy. The high energy CRs will interact with the ambient gas and produce gamma-rays, which dominate t... DTSTART;TZID=Asia/Shanghai:20201015T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20201015T140000Z LOCATION: SUMMARY:The Galactic Cosmic Rays: From MeV to PeV. URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1614.htm END:VEVENT BEGIN:VEVENT UID:1613@kiaa.pku.edu.cn DTSTAMP:20201022T140000Z CREATED:20201022T140000Z DESCRIPTION:Supernovae (SNe) are one of the most energetic explosion events in the universe, with the human detectability not only in electromagnetic waves but also neutrino and possibly gravitational waves. They... DTSTART;TZID=Asia/Shanghai:20201022T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20201022T140000Z LOCATION: SUMMARY:X-ray study of supernova remnants as remnants of supernovae URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1613.htm END:VEVENT BEGIN:VEVENT UID:1612@kiaa.pku.edu.cn DTSTAMP:20201029T160000Z CREATED:20201029T160000Z DESCRIPTION:With more than 4000 exoplanets found and about 2-dozens of planets with detected atmospheric chemical species, we moved from an era of discovery to a new era of exoplanet characterisation. On the othe... DTSTART;TZID=Asia/Shanghai:20201029T160000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20201029T160000Z LOCATION: SUMMARY:Unveiling the secrets of Jupiter with the Juno mission URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1612.htm END:VEVENT BEGIN:VEVENT UID:1736@kiaa.pku.edu.cn DTSTAMP:20201103T103000Z CREATED:20201103T103000Z DESCRIPTION:Warped accretion discs are common around black holes and stars. There is growing indirect observational evidence for warped circumstellar discs around young stars, indicated by shadows cast by the war... DTSTART;TZID=Asia/Shanghai:20201103T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20201103T103000Z LOCATION: SUMMARY:Introduction to Warped Accretion Discs URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1736.htm END:VEVENT BEGIN:VEVENT UID:1611@kiaa.pku.edu.cn DTSTAMP:20201105T140000Z CREATED:20201105T140000Z DESCRIPTION:Recent spatially-resolved studies have suggested that some of the correlations among global quantities (e.g., star formation rate, stellar mass, gas mass) might be an ensemble effect of local processe... DTSTART;TZID=Asia/Shanghai:20201105T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20201105T140000Z LOCATION: SUMMARY:Star formation scaling relations of nearby galaxies in the ALMaQUEST survey URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1611.htm END:VEVENT BEGIN:VEVENT UID:1610@kiaa.pku.edu.cn DTSTAMP:20201112T140000Z CREATED:20201112T140000Z DESCRIPTION:Quenched massive spiral galaxies have attracted great attention recently, as more data is available to constrain their environment and cold gas content. However, the quenching mechanism is still uncer... DTSTART;TZID=Asia/Shanghai:20201112T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20201112T140000Z LOCATION: SUMMARY:The quenching of massive spiral galaxies URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1610.htm END:VEVENT BEGIN:VEVENT UID:1609@kiaa.pku.edu.cn DTSTAMP:20201119T140000Z CREATED:20201119T140000Z DESCRIPTION:Kinetic field theory (KFT) has been developed in recent years to study structure formation in ensembles of classical particles in and out of equilibrium. In a straightforward manner, KFT can be specia... DTSTART;TZID=Asia/Shanghai:20201119T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20201119T140000Z LOCATION: SUMMARY:Cosmic structure formation with analytic methods URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1609.htm END:VEVENT BEGIN:VEVENT UID:1735@kiaa.pku.edu.cn DTSTAMP:20201124T103000Z CREATED:20201124T103000Z DESCRIPTION: DTSTART;TZID=Asia/Shanghai:20201124T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20201124T103000Z LOCATION: SUMMARY:周培源-彭桓武时空观——兼论“天眼”与“慧眼”对中子星与黑洞的观测 URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1735.htm END:VEVENT BEGIN:VEVENT UID:1608@kiaa.pku.edu.cn DTSTAMP:20201126T160000Z CREATED:20201126T160000Z DESCRIPTION:Planets form from discs of material around young (oduced in clusters. There is a growing realisation that planet-forming discs are not isolated systems and instead are influenced by the gravitational ... DTSTART;TZID=Asia/Shanghai:20201126T160000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20201126T160000Z LOCATION: SUMMARY:Planet formation in stellar clusters URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1608.htm END:VEVENT BEGIN:VEVENT UID:1607@kiaa.pku.edu.cn DTSTAMP:20201203T160000Z CREATED:20201203T160000Z DESCRIPTION:The study of GRBs has been an active field in astrophysics over the years, which has undergone a significant boost in interest with the joint detection of GW170817/GRB 170817A and several new types of... DTSTART;TZID=Asia/Shanghai:20201203T160000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20201203T160000Z LOCATION: SUMMARY:Recent Progress on New Type of Gamma-Ray Bursts URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1607.htm END:VEVENT BEGIN:VEVENT UID:1606@kiaa.pku.edu.cn DTSTAMP:20201210T090000Z CREATED:20201210T090000Z DESCRIPTION:Recent ground based observations at various wavelengths reveal a variety of protoplanetary disk structures. These disk structures may help us to constrain the planet formation process. We apply the pl... DTSTART;TZID=Asia/Shanghai:20201210T090000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20201210T090000Z LOCATION: SUMMARY:Protoplanetary Disk Structure and Young Planet Population URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1606.htm END:VEVENT BEGIN:VEVENT UID:1734@kiaa.pku.edu.cn DTSTAMP:20201214T150000Z CREATED:20201214T150000Z DESCRIPTION:天文学的发展，持久的动力来自观测，特别是突破性的新发现。观测天文学目前已经从刻画静态宇宙发展到认识动态宇宙，通过多波段、时域监测来揭示宇宙中各类天体的变化并发现和探索各类新天体、新现象。时域天文学已然... DTSTART;TZID=Asia/Shanghai:20201214T150000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20201214T150000Z LOCATION: SUMMARY:时域天文学与司天工程 Time-domain astrophysics and the "sitian” project URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1734.htm END:VEVENT BEGIN:VEVENT UID:1733@kiaa.pku.edu.cn DTSTAMP:20201215T103000Z CREATED:20201215T103000Z DESCRIPTION:The origin of chemically peculiar stars and non-zero eccentricity in evolved close binaries have been long-standing problems in binary stellar evolution. Answers to these questions may trace back to a... DTSTART;TZID=Asia/Shanghai:20201215T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20201215T103000Z LOCATION: SUMMARY:Mass tranfer in AGB binaries - uncovering a new evolution channel by simulations URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1733.htm END:VEVENT BEGIN:VEVENT UID:1756@kiaa.pku.edu.cn DTSTAMP:20201217T090000Z CREATED:20201217T090000Z DESCRIPTION:The interstellar medium is the fuel for star formation and AGN, and the sink for their feedback energy. It also records the history of star formation in its elemental abundances. The warm ionized gas ... DTSTART;TZID=Asia/Shanghai:20201217T090000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20201217T090000Z LOCATION: SUMMARY:Towards Precision Astrophysics for Warm Ionized Gas URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1071/1756.htm END:VEVENT BEGIN:VEVENT UID:1732@kiaa.pku.edu.cn DTSTAMP:20201222T140000Z CREATED:20201222T140000Z DESCRIPTION:Machine learning application upon astronomical studies can be traced back to 1990s, while it was until recent years that astronomical community started to pay significant attention to this area. In th... DTSTART;TZID=Asia/Shanghai:20201222T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20201222T140000Z LOCATION: SUMMARY:Workflow of deep learning application on astronomical research: Hunting Giant Radio Galxy as an case study URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1732.htm END:VEVENT BEGIN:VEVENT UID:1605@kiaa.pku.edu.cn DTSTAMP:20201224T140000Z CREATED:20201224T140000Z DESCRIPTION:Fast radio bursts (FRBs) are millisecond radio pulses detected from cosmological distances. A large number of models invoke extragalactic magnetars as the sources of these mysterious events. Magnetars... DTSTART;TZID=Asia/Shanghai:20201224T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20201224T140000Z LOCATION: SUMMARY:Magnetars, a possible engine of FRBs--the first smoking gun from SGR J1935+2154 URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1605.htm END:VEVENT BEGIN:VEVENT UID:1604@kiaa.pku.edu.cn DTSTAMP:20201231T140000Z CREATED:20201231T140000Z DESCRIPTION:The search for extrasolar planets initially focused on Sun-like FGK main-sequence stars, but efforts have been made in recent years to search for planets around more massive stars in their giant phase... DTSTART;TZID=Asia/Shanghai:20201231T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20201231T140000Z LOCATION: SUMMARY:Dynamics and Origins of Planets Around Non-Solar-Type Stars URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1604.htm END:VEVENT BEGIN:VEVENT UID:1603@kiaa.pku.edu.cn DTSTAMP:20210107T090000Z CREATED:20210107T090000Z DESCRIPTION:Galaxy formation is an essential research area in astronomy. In recent years, high-resolution cosmological zoom-in simulations with realistic multi-phase ISM, star formation, and feedback models have ... DTSTART;TZID=Asia/Shanghai:20210107T090000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210107T090000Z LOCATION: SUMMARY:Decipher the ubiquitous bursty phase in high-redshift galaxy formation URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1603.htm END:VEVENT BEGIN:VEVENT UID:1602@kiaa.pku.edu.cn DTSTAMP:20210108T090000Z CREATED:20210108T090000Z DESCRIPTION:<p>Over the past decades, the discovery of a large number of young massive clusters (YMCs) in the local Universe and giant clumps in high-z galaxies suggests that clustered star formation is the dominant...</p> DTSTART;TZID=Asia/Shanghai:20210108T090000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210108T090000Z LOCATION: SUMMARY:Bridging the Gap Between Galaxy and Star Formation with Star Clusters URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1602.htm END:VEVENT BEGIN:VEVENT UID:1731@kiaa.pku.edu.cn DTSTAMP:20210108T090000Z CREATED:20210108T090000Z DESCRIPTION:Over the past decades, the discovery of a large number of young massive clusters (YMCs) in the local Universe and giant clumps in high-z galaxies suggests that clustered star formation is the dominant... DTSTART;TZID=Asia/Shanghai:20210108T090000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210108T090000Z LOCATION: SUMMARY:Bridging the Gap Between Galaxy and Star Formation with Star Clusters URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1731.htm END:VEVENT BEGIN:VEVENT UID:1601@kiaa.pku.edu.cn DTSTAMP:20210111T160000Z CREATED:20210111T160000Z DESCRIPTION:<p>In recent years we witnessed tremendous progress in high frequency very long baseline radiointerferometry (VLBI). These developments were most notably marked by the first image of a supermassive black...</p> DTSTART;TZID=Asia/Shanghai:20210111T160000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210111T160000Z LOCATION: SUMMARY:The radio-bright future of studying black holes URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1601.htm END:VEVENT BEGIN:VEVENT UID:1730@kiaa.pku.edu.cn DTSTAMP:20210111T160000Z CREATED:20210111T160000Z DESCRIPTION:In recent years we witnessed tremendous progress in high frequency very long baseline radiointerferometry (VLBI). These developments were most notably marked by the first image of a supermassive black... DTSTART;TZID=Asia/Shanghai:20210111T160000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210111T160000Z LOCATION: SUMMARY:The radio-bright future of studying black holes URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1730.htm END:VEVENT BEGIN:VEVENT UID:1600@kiaa.pku.edu.cn DTSTAMP:20210112T110000Z CREATED:20210112T110000Z DESCRIPTION:Metals, conventionally defined as elements heavier than hydrogen and helium, are actively circulated between galaxies and their circumgalactic medium (CGM). Dwarf galaxies are more efficient at propel... DTSTART;TZID=Asia/Shanghai:20210112T110000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210112T110000Z LOCATION: SUMMARY:The First Census of Metals in Dwarf Galaxies URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1600.htm END:VEVENT BEGIN:VEVENT UID:1599@kiaa.pku.edu.cn DTSTAMP:20210112T160000Z CREATED:20210112T160000Z DESCRIPTION:<p>Ionized plasmas are ubiquitous in the Universe: from stellar coronae to cosmic web filaments. Characterizing ionized plasmas is critical to address many astrophysical questions, for instance, the inte...</p> DTSTART;TZID=Asia/Shanghai:20210112T160000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210112T160000Z LOCATION: SUMMARY:High-resolution spectroscopy of ionized plasmas in the Universe URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1599.htm END:VEVENT BEGIN:VEVENT UID:1729@kiaa.pku.edu.cn DTSTAMP:20210112T160000Z CREATED:20210112T160000Z DESCRIPTION:Ionized plasmas are ubiquitous in the Universe: from stellar coronae to cosmic web filaments. Characterizing ionized plasmas is critical to address many astrophysical questions, for instance, the inte... DTSTART;TZID=Asia/Shanghai:20210112T160000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210112T160000Z LOCATION: SUMMARY:High-resolution spectroscopy of ionized plasmas in the Universe URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1729.htm END:VEVENT BEGIN:VEVENT UID:1598@kiaa.pku.edu.cn DTSTAMP:20210225T090000Z CREATED:20210225T090000Z DESCRIPTION:In the past 30 years, astronomers have discovered thousands of planets orbiting stars outside the solar system. Most of the exoplanets we know of today orbit stars that will eventually exhaust their n... DTSTART;TZID=Asia/Shanghai:20210225T090000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210225T090000Z LOCATION: SUMMARY:A Song of Ice and Fire: the Fate of Planetary Systems After Stellar Death URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1598.htm END:VEVENT BEGIN:VEVENT UID:1597@kiaa.pku.edu.cn DTSTAMP:20210304T090000Z CREATED:20210304T090000Z DESCRIPTION:Sitting at the heart of nearly all galaxies is a massive black hole, that, while typically 1000 times less massive than the galaxy in which it resides, has the potential to release enough energy via a... DTSTART;TZID=Asia/Shanghai:20210304T090000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210304T090000Z LOCATION: SUMMARY:Reverberation mapping black hole accretion flows URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1597.htm END:VEVENT BEGIN:VEVENT UID:1596@kiaa.pku.edu.cn DTSTAMP:20210311T140000Z CREATED:20210311T140000Z DESCRIPTION:Insight-HXMT is China’s first X-ray astronomy satellite and was successfully launched on June 15th, 2017. It carries three sets of collimated X-ray instruments with large effective areas, covering en... DTSTART;TZID=Asia/Shanghai:20210311T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210311T140000Z LOCATION: SUMMARY:Highlights of Recent Results from Insight-HXMT: China's 1st X-ray Astronomy Satellite URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1596.htm END:VEVENT BEGIN:VEVENT UID:1728@kiaa.pku.edu.cn DTSTAMP:20210316T103000Z CREATED:20210316T103000Z DESCRIPTION:Textures and patterns are ubiquitous in astronomical data but challenging to quantify. The speaker will present a novel statistical tool, called the “scattering transform”. It borrows ideas from con... DTSTART;TZID=Asia/Shanghai:20210316T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210316T103000Z LOCATION: SUMMARY:A new vocabulary for patterns and its cosmological applications, or, a CNN without training URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1728.htm END:VEVENT BEGIN:VEVENT UID:1595@kiaa.pku.edu.cn DTSTAMP:20210318T090000Z CREATED:20210318T090000Z DESCRIPTION:When a star falls sufficiently close to a supermassive black hole, it is disrupted by the enormous tidal forces and then the debris feeds a sudden burst of accretion. Such tidal disruption events (TDE... DTSTART;TZID=Asia/Shanghai:20210318T090000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210318T090000Z LOCATION: SUMMARY:Recent Progress in Understanding Tidal Disruption Events URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1595.htm END:VEVENT BEGIN:VEVENT UID:1594@kiaa.pku.edu.cn DTSTAMP:20210325T140000Z CREATED:20210325T140000Z DESCRIPTION:Jets/winds are ubiquitously in association with different celestial objects. However, most of previous theoretical studies of them rely on numerical calculations, not being able to provide a more conv... DTSTART;TZID=Asia/Shanghai:20210325T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210325T140000Z LOCATION: SUMMARY:Analytical Solution of Magnetically Dominated Astrophysical Jets and Winds: Jet Launching, Acceleration, and Collimation URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1594.htm END:VEVENT BEGIN:VEVENT UID:1727@kiaa.pku.edu.cn DTSTAMP:20210331T160000Z CREATED:20210331T160000Z DESCRIPTION:Brown dwarfs and relatively isolated young extrasolar giant planets occupy an important parameter space to understand planetary atmospheres. Recent observations of these worlds have provided unprecede... DTSTART;TZID=Asia/Shanghai:20210331T160000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210331T160000Z LOCATION: SUMMARY:Stormy weather on brown dwarfs and isolated young giant planets URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1727.htm END:VEVENT BEGIN:VEVENT UID:1593@kiaa.pku.edu.cn DTSTAMP:20210401T160000Z CREATED:20210401T160000Z DESCRIPTION:In past century we have learned much about the origin and evolution of the Universe. We now know the Universe is 13.8 billion years old, but its main ingredients remain a mystery: atoms make up only 5... DTSTART;TZID=Asia/Shanghai:20210401T160000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210401T160000Z LOCATION: SUMMARY:Euclid: exploring the dark Universe URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1593.htm END:VEVENT BEGIN:VEVENT UID:1726@kiaa.pku.edu.cn DTSTAMP:20210407T140000Z CREATED:20210407T140000Z DESCRIPTION:Wide-field radio-interferometer surveys at high resolution, relatively low frequency and with very high dynamic range requirement play a prominent role in current and forthcoming radio astronomy progr... DTSTART;TZID=Asia/Shanghai:20210407T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210407T140000Z LOCATION: SUMMARY:High dynamic range wide field imaging method in radio interferometry URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1726.htm END:VEVENT BEGIN:VEVENT UID:1592@kiaa.pku.edu.cn DTSTAMP:20210408T160000Z CREATED:20210408T160000Z DESCRIPTION:The Hubble Constant is a measure of the expansion rate of the Universe, but in recent years a dichotomy, or tension at the 5-sigma level, has appeared between its measurement in the early Universe for... DTSTART;TZID=Asia/Shanghai:20210408T160000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210408T160000Z LOCATION: SUMMARY:Time-delay cosmography: tensions between measurements of the Hubble constant from the early and late Universe URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1592.htm END:VEVENT BEGIN:VEVENT UID:1591@kiaa.pku.edu.cn DTSTAMP:20210415T140000Z CREATED:20210415T140000Z DESCRIPTION:The Planet formation involves complicated MHD processes. Planets are believed to be formed within the proto-planetary disks. The speaker will talk about some of the processes related to the proto-plan... DTSTART;TZID=Asia/Shanghai:20210415T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210415T140000Z LOCATION: SUMMARY:Some MHD processes during planet formation and evolution URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1591.htm END:VEVENT BEGIN:VEVENT UID:1725@kiaa.pku.edu.cn DTSTAMP:20210416T103000Z CREATED:20210416T103000Z DESCRIPTION:A major uncertainty in the determination of the mass profile of the Milky Way using stellar kinematics is the poorly determined anisotropy parameter, beta = 1 - ( ( (sigma_theta)**2 + (sigma_phi)**2 )... DTSTART;TZID=Asia/Shanghai:20210416T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210416T103000Z LOCATION: SUMMARY:Galactic Mass and Anisotropy Profile with Halo K-Giant and Blue Horizontal Branch Stars from LAMOST/SDSS and Gaia URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1725.htm END:VEVENT BEGIN:VEVENT UID:1590@kiaa.pku.edu.cn DTSTAMP:20210422T140000Z CREATED:20210422T140000Z DESCRIPTION:Heavy particles can be produced on shell during inflation and leave distinct signals in the correlations of density fluctuations. These signals can be searched for in the future CMB/LSS/21cm observati... DTSTART;TZID=Asia/Shanghai:20210422T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210422T140000Z LOCATION: SUMMARY:Recent progress in cosmological collider physics URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1590.htm END:VEVENT BEGIN:VEVENT UID:1589@kiaa.pku.edu.cn DTSTAMP:20210429T090000Z CREATED:20210429T090000Z DESCRIPTION:Encoded in the atomic ISM is physics crucial to the baryonic cycle, including the formation of molecular clouds and the origin of interstellar turbulence from stellar feedback. Nearby galaxies provide... DTSTART;TZID=Asia/Shanghai:20210429T090000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210429T090000Z LOCATION: SUMMARY:Unravelling Atomic ISM Physics Across the Local Group URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1589.htm END:VEVENT BEGIN:VEVENT UID:1588@kiaa.pku.edu.cn DTSTAMP:20210506T140000Z CREATED:20210506T140000Z DESCRIPTION:Light rings (LRs) play an important role in gravitational wave observations and black hole photographs. In this paper, we investigate general features of LRs in stationary, axisymmetric, asymptotical... DTSTART;TZID=Asia/Shanghai:20210506T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210506T140000Z LOCATION: SUMMARY:Universal Properties of Light Rings for Stationary Axisymmetric Spacetimes URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1588.htm END:VEVENT BEGIN:VEVENT UID:1587@kiaa.pku.edu.cn DTSTAMP:20210513T110000Z CREATED:20210513T110000Z DESCRIPTION:Massive stars play important roles in many astrophysical systems by providing the radiative and mechanical energy output. They can also produce black holes and neutron stars when they explode. However... DTSTART;TZID=Asia/Shanghai:20210513T110000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210513T110000Z LOCATION: SUMMARY:Understanding the Structures and Evolutions of Massive Stars Based on 3D Radiation Hydrodynamic Simulations URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1587.htm END:VEVENT BEGIN:VEVENT UID:1724@kiaa.pku.edu.cn DTSTAMP:20210518T103000Z CREATED:20210518T103000Z DESCRIPTION:The theory of General Relativity has successfully passed a large number of observational tests. The theory has been extensively tested in the weak-field regime with experiments in the Solar System and... DTSTART;TZID=Asia/Shanghai:20210518T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210518T103000Z LOCATION: SUMMARY:Testing General Relativity with black hole X-ray data: recent progress and future developments URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1724.htm END:VEVENT BEGIN:VEVENT UID:1586@kiaa.pku.edu.cn DTSTAMP:20210520T160000Z CREATED:20210520T160000Z DESCRIPTION:During the Great Plague of London in 1965, Isaac Newton went for a 2 year quarantene in his home in Woolsthorpe, where he layed down the faundation of his later theories on calculus, optics and the la... DTSTART;TZID=Asia/Shanghai:20210520T160000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210520T160000Z LOCATION: SUMMARY:Chaos and the time-reversibility paradox URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1586.htm END:VEVENT BEGIN:VEVENT UID:1585@kiaa.pku.edu.cn DTSTAMP:20210527T160000Z CREATED:20210527T160000Z DESCRIPTION:Observations show that exoplanets are ubiquitous. For the first time, we have the technological capability to discover planets with similar bulk properties to Earth by monitoring the radial-velocity o... DTSTART;TZID=Asia/Shanghai:20210527T160000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210527T160000Z LOCATION: SUMMARY:Discovering other Earths while sustaining our unique home in the Cosmos URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1585.htm END:VEVENT BEGIN:VEVENT UID:1584@kiaa.pku.edu.cn DTSTAMP:20210603T090000Z CREATED:20210603T090000Z DESCRIPTION:Since the launch of the Transiting Exoplanet Survey Satellite (TESS) three years ago, the exoplanet field had a new boom of discoveries. In this talk, the speaker will review the main exoplanet result... DTSTART;TZID=Asia/Shanghai:20210603T090000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210603T090000Z LOCATION: SUMMARY:1000 days Around the Earth - the Planets discovered by TESS URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1584.htm END:VEVENT BEGIN:VEVENT UID:1583@kiaa.pku.edu.cn DTSTAMP:20210610T140000Z CREATED:20210610T140000Z DESCRIPTION:<p>All measurements of cosmic star formation must assume the stellar initial mass function (IMF) to extrapolate from the star-formation rate (SFR) measured for massive stars to the total SFR. Traditional...</p> DTSTART;TZID=Asia/Shanghai:20210610T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210610T140000Z LOCATION: SUMMARY:Probing stellar initial mass function with CNO isotopes URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1583.htm END:VEVENT BEGIN:VEVENT UID:1723@kiaa.pku.edu.cn DTSTAMP:20210611T100000Z CREATED:20210611T100000Z DESCRIPTION:Much of the lensing effects in astrophysics can be adequately described using geometric optics, where light from a point source can be split into multiple magnified images. In coherent sources, such ... DTSTART;TZID=Asia/Shanghai:20210611T100000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210611T100000Z LOCATION: SUMMARY:Bridging geometric and wave optics through the complex plane URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1723.htm END:VEVENT BEGIN:VEVENT UID:1582@kiaa.pku.edu.cn DTSTAMP:20210909T140000Z CREATED:20210909T140000Z DESCRIPTION:We evaluate the ability of Convolutional Neural Networks (CNNs) to predict galaxy cluster masses in the BAHAMAS hydrodynamical simulations. We train four separate single-channel networks using: stella... DTSTART;TZID=Asia/Shanghai:20210909T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210909T140000Z LOCATION: SUMMARY:Galaxy cluster mass estimation with deep learning and hydrodynamical simulations URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1582.htm END:VEVENT BEGIN:VEVENT UID:1581@kiaa.pku.edu.cn DTSTAMP:20210916T140000Z CREATED:20210916T140000Z DESCRIPTION:Time-domain astrophysics is being revolutionised by the advent of the multi-wavelength and multi-messenger era. The Einstein Probe (EP) is a space mission designed to discover and characterise high-en... DTSTART;TZID=Asia/Shanghai:20210916T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210916T140000Z LOCATION: SUMMARY:Exploring the dynamic X-ray universe with the Einstein Probe mission URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1581.htm END:VEVENT BEGIN:VEVENT UID:1580@kiaa.pku.edu.cn DTSTAMP:20210923T140000Z CREATED:20210923T140000Z DESCRIPTION:In this talk, the speaker will show the fast radio burst (FRB) searching efforts with Chinese radio telescopes, including Xinjiang 26m, Yunnan 40m, Luonan 40m, and FAST 500m telescopes. they will disc... DTSTART;TZID=Asia/Shanghai:20210923T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210923T140000Z LOCATION: SUMMARY:Search for Fast radio bursts with Chinese radio telescopes URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1580.htm END:VEVENT BEGIN:VEVENT UID:1579@kiaa.pku.edu.cn DTSTAMP:20210930T160000Z CREATED:20210930T160000Z DESCRIPTION:<p>Structures such as gaps and rings in ALMA observations of protoplanetary disks have long been hailed as signposts of planet formation. However, a direct link between exoplanets and protoplanetary disk...</p> DTSTART;TZID=Asia/Shanghai:20210930T160000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20210930T160000Z LOCATION: SUMMARY:Novel views on planet formation and dust evolution: connecting protoplanetary disk demographics with exoplanets, debris disks and exoplanet atmospheres URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1579.htm END:VEVENT BEGIN:VEVENT UID:1578@kiaa.pku.edu.cn DTSTAMP:20211014T103000Z CREATED:20211014T103000Z DESCRIPTION:Nonconvex optimization is a central research topic in machine learning, mainly because the loss functions in many machine learning models (including neural networks) are typically nonconvex. However, ... DTSTART;TZID=Asia/Shanghai:20211014T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20211014T103000Z LOCATION: SUMMARY:Classical and quantum algorithms for nonconvex optimization URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1578.htm END:VEVENT BEGIN:VEVENT UID:1577@kiaa.pku.edu.cn DTSTAMP:20211014T140000Z CREATED:20211014T140000Z DESCRIPTION:The asteroids provide excellent opportunities to study the formation and early evolution of the Solar System. This is because they are small and can not retain heat efficiently, and thus cooled early ... DTSTART;TZID=Asia/Shanghai:20211014T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20211014T140000Z LOCATION: SUMMARY:What can we learn about the origin of the Solar System from the study of extraterrestrial materials URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1577.htm END:VEVENT BEGIN:VEVENT UID:1576@kiaa.pku.edu.cn DTSTAMP:20211021T160000Z CREATED:20211021T160000Z DESCRIPTION:X-ray spectroscopy is one of our main tools for studying the physical and chemical properties of the intracluster, intragroup, circumgalactic, and intergalactic media, and understanding their connecti... DTSTART;TZID=Asia/Shanghai:20211021T160000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20211021T160000Z LOCATION: SUMMARY:X-ray imaging spectroscopy as a powerful tool to probe the physics and evolution of the Universe’s large-scale structure URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1576.htm END:VEVENT BEGIN:VEVENT UID:1575@kiaa.pku.edu.cn DTSTAMP:20211028T140000Z CREATED:20211028T140000Z DESCRIPTION:I will present recent results of the kinematics of planetary nebulae (PNe) and globular clusters (GCs) out to about 200 kpc from the center of the Fornax cluster. We have collected more than 2000 new ... DTSTART;TZID=Asia/Shanghai:20211028T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20211028T140000Z LOCATION: SUMMARY:Cold stellar streams in the Fornax cluster core URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1575.htm END:VEVENT BEGIN:VEVENT UID:1574@kiaa.pku.edu.cn DTSTAMP:20211104T140000Z CREATED:20211104T140000Z DESCRIPTION:The 2m-aperture Chinese Survey Space Telescope (also known as the Chinese Space Station Telescope, CSST) is a major science project of China Manned Space Program. It is expected to start science opera... DTSTART;TZID=Asia/Shanghai:20211104T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20211104T140000Z LOCATION: SUMMARY:An Update of the Chinese Survey Space Telescope Project URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1574.htm END:VEVENT BEGIN:VEVENT UID:1722@kiaa.pku.edu.cn DTSTAMP:20211115T150000Z CREATED:20211115T150000Z DESCRIPTION:Astrometry opened the era of modern astronomy/physics and plays a crucial role in contemporary astronomy, including the measurement of the three-dimensional structure of the Milky Way, black hole dete... DTSTART;TZID=Asia/Shanghai:20211115T150000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20211115T150000Z LOCATION: SUMMARY:High-precision Astrometry (高精度天体测量) URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1722.htm END:VEVENT BEGIN:VEVENT UID:1573@kiaa.pku.edu.cn DTSTAMP:20211118T100000Z CREATED:20211118T100000Z DESCRIPTION:Relativistic jets of blazars and magnetized coronae of highly accreting black holes routinely display non-thermal emission signatures, including fast and bright flares of high-energy emission. Yet, th... DTSTART;TZID=Asia/Shanghai:20211118T100000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20211118T100000Z LOCATION: SUMMARY:Fast and furious: reconnection-powered emission in relativistic jets and black hole coronae URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1573.htm END:VEVENT BEGIN:VEVENT UID:1572@kiaa.pku.edu.cn DTSTAMP:20211125T140000Z CREATED:20211125T140000Z DESCRIPTION:As the outermost layer of the solar atmosphere, the corona plays a key role in shaping the plasma and magnetic field environment of the solar system. The quiescent corona has a temperature of about on... DTSTART;TZID=Asia/Shanghai:20211125T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20211125T140000Z LOCATION: SUMMARY:From the solar corona to stellar coronae URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1572.htm END:VEVENT BEGIN:VEVENT UID:1571@kiaa.pku.edu.cn DTSTAMP:20211202T140000Z CREATED:20211202T140000Z DESCRIPTION:The overwhelmingly homochiral nature of life has left a puzzle as to whether mirror-image biology systems based on a chirally inverted version of molecular machinery could also exist. We initially dev... DTSTART;TZID=Asia/Shanghai:20211202T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20211202T140000Z LOCATION: SUMMARY:Mirror-image biology systems URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1571.htm END:VEVENT BEGIN:VEVENT UID:1570@kiaa.pku.edu.cn DTSTAMP:20211209T140000Z CREATED:20211209T140000Z DESCRIPTION:Precision radial velocity and photometric monitoring of a large number of stars may reveal hitherto overlooked populations of binary systems consisting of normal stars and unseen compact objects. I wi... DTSTART;TZID=Asia/Shanghai:20211209T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20211209T140000Z LOCATION: SUMMARY:Modeling Signals from Star--Compact-object Binaries URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1570.htm END:VEVENT BEGIN:VEVENT UID:1569@kiaa.pku.edu.cn DTSTAMP:20211216T140000Z CREATED:20211216T140000Z DESCRIPTION:The discovery of gravitational waves from the coalescence of binary black holes in 2015 has marked the dawn of the gravitational wave (GW) astronomy/cosmology. Besides the gravitational wave bursts fr... DTSTART;TZID=Asia/Shanghai:20211216T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20211216T140000Z LOCATION: SUMMARY:Stochastic gravitational waves from Primordial Black Holes URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1569.htm END:VEVENT BEGIN:VEVENT UID:1568@kiaa.pku.edu.cn DTSTAMP:20211229T090000Z CREATED:20211229T090000Z DESCRIPTION:The environment around neutron stars features high magnetization, strong gravity, and relativistic particles. With radio, X-ray, and gravitational wave observations, neutron stars are perfect laborato... DTSTART;TZID=Asia/Shanghai:20211229T090000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20211229T090000Z LOCATION: SUMMARY:Physical Processes and Radiations around Neutron Stars URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1568.htm END:VEVENT BEGIN:VEVENT UID:1567@kiaa.pku.edu.cn DTSTAMP:20211231T150000Z CREATED:20211231T150000Z DESCRIPTION:Cosmology was once a mainly philosophical endeavour, but thanks to the exponential growth of astronomical data over the last decades, it has become a data driven field of science where we can study ph... DTSTART;TZID=Asia/Shanghai:20211231T150000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20211231T150000Z LOCATION: SUMMARY:Cosmology & Dark Energy URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1567.htm END:VEVENT BEGIN:VEVENT UID:1566@kiaa.pku.edu.cn DTSTAMP:20220103T090000Z CREATED:20220103T090000Z DESCRIPTION:As the most luminous non-transit objects, quasars are unique probes of the early Universe. I have been leading a wide-field reionization-era quasar survey, which has provided the first large statistic... DTSTART;TZID=Asia/Shanghai:20220103T090000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20220103T090000Z LOCATION: SUMMARY:Probing the Cosmic Reionization History and the Earliest SMBHs Using Distant Quasars URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1566.htm END:VEVENT BEGIN:VEVENT UID:1565@kiaa.pku.edu.cn DTSTAMP:20220104T130000Z CREATED:20220104T130000Z DESCRIPTION:Cluster cosmology has entered into a new and exciting era allowing us to probe the universe at an unprecedented scale, thanks to the deployment of large-sky surveys in multiple wavelengths and the rec... DTSTART;TZID=Asia/Shanghai:20220104T130000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20220104T130000Z LOCATION: SUMMARY:Observational cosmology with Galaxy clusters in the era of Large Sky surveys URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1565.htm END:VEVENT BEGIN:VEVENT UID:1564@kiaa.pku.edu.cn DTSTAMP:20220105T090000Z CREATED:20220105T090000Z DESCRIPTION:Galaxy formation is currently faced with immense datasets, both observational and simulated, with much more on the way. As the simulations continue to improve, I argue it is time to start thinking abo... DTSTART;TZID=Asia/Shanghai:20220105T090000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20220105T090000Z LOCATION: SUMMARY:Towards a predictive theory of galaxy formation: lessons from turbulence in disk galaxies URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1564.htm END:VEVENT BEGIN:VEVENT UID:1563@kiaa.pku.edu.cn DTSTAMP:20220106T090000Z CREATED:20220106T090000Z DESCRIPTION:Galaxy clusters are the largest virialized structures in the universe, providing ideal laboratories to study cosmology, plasma physics, and the nature of dark matter. Understanding their formation and... DTSTART;TZID=Asia/Shanghai:20220106T090000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20220106T090000Z LOCATION: SUMMARY:Formation of Galaxy Clusters: from the Cores to Outskirts URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1563.htm END:VEVENT BEGIN:VEVENT UID:1562@kiaa.pku.edu.cn DTSTAMP:20220224T140000Z CREATED:20220224T140000Z DESCRIPTION:Inspired by the Arecibo telescope, a technical and scientific wonder of the 20th century, the Five-hundred-meter Aperture Spherical radio Telescope (FAST) was originally proposed as part of a SKA con... DTSTART;TZID=Asia/Shanghai:20220224T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20220224T140000Z LOCATION: SUMMARY:From Arecibo to CRAFTS: Bridging the Centuries URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1562.htm END:VEVENT BEGIN:VEVENT UID:1561@kiaa.pku.edu.cn DTSTAMP:20220303T140000Z CREATED:20220303T140000Z DESCRIPTION:On Earth’s surface, there are only a handful of high-quality astronomical sites that meet the requirements for very large next-generation facilities. In the context of scientific opportunities in tim... DTSTART;TZID=Asia/Shanghai:20220303T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20220303T140000Z LOCATION: SUMMARY:Reaching the deep universe from Lenghu on the Tibetan plateau-current status and future perspective URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1561.htm END:VEVENT BEGIN:VEVENT UID:1560@kiaa.pku.edu.cn DTSTAMP:20220310T100000Z CREATED:20220310T100000Z DESCRIPTION:In this talk the speaker will review their current understanding of giant planet and binary star formation, highlighting the key similarities and unique unknowns for each process. She will show how cu... DTSTART;TZID=Asia/Shanghai:20220310T100000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20220310T100000Z LOCATION: SUMMARY:From planets to binaries URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1560.htm END:VEVENT BEGIN:VEVENT UID:1559@kiaa.pku.edu.cn DTSTAMP:20220317T140000Z CREATED:20220317T140000Z DESCRIPTION:Magnetic fields play an important role in the evolution of interstellar medium and star formation. As the only direct tracer of interstellar field strength, credible Zeeman measurements remain sparse ... DTSTART;TZID=Asia/Shanghai:20220317T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20220317T140000Z LOCATION: SUMMARY:An early transition to magnetic supercriticality in star formation URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1559.htm END:VEVENT BEGIN:VEVENT UID:1558@kiaa.pku.edu.cn DTSTAMP:20220324T140000Z CREATED:20220324T140000Z DESCRIPTION:To date, more than 3000 exoplanetary systems have been observed. Different kinds of planetary configurations are reported. Such as near-resonant configuration, closely packed multiple planetary system... DTSTART;TZID=Asia/Shanghai:20220324T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20220324T140000Z LOCATION: SUMMARY:The Configuration Formation of Exoplanetary Systems URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1558.htm END:VEVENT BEGIN:VEVENT UID:1557@kiaa.pku.edu.cn DTSTAMP:20220331T140000Z CREATED:20220331T140000Z DESCRIPTION:Meteorites display an isotopic composition dichotomy between non-carbonaceous (NC) and carbonaceous (CC) groups, indicating that planetesimal formation in the solar protoplanetary disk occurred in two... DTSTART;TZID=Asia/Shanghai:20220331T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20220331T140000Z LOCATION: SUMMARY:Does Jupiter form early? URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1557.htm END:VEVENT BEGIN:VEVENT UID:1556@kiaa.pku.edu.cn DTSTAMP:20220407T140000Z CREATED:20220407T140000Z DESCRIPTION:The traditional theory of stellar structure and evolution, presuming that stars formed and evolved in isolation, and the effect of rotation is negligible, is now a view of the past. Recent studies bas... DTSTART;TZID=Asia/Shanghai:20220407T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20220407T140000Z LOCATION: SUMMARY:How does stellar rotation impact their structure and evolution? URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1556.htm END:VEVENT BEGIN:VEVENT UID:1721@kiaa.pku.edu.cn DTSTAMP:20220411T150000Z CREATED:20220411T150000Z DESCRIPTION:The halo stars on highly radial orbits should inevitably pass the center regions of the Milky Way, although they are hard to be detected from the crowded bulge/bar. Under the assumption that the stell... DTSTART;TZID=Asia/Shanghai:20220411T150000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20220411T150000Z LOCATION: SUMMARY:The Milky Way Halo Stars toward the Galactic Center URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1721.htm END:VEVENT BEGIN:VEVENT UID:1555@kiaa.pku.edu.cn DTSTAMP:20220414T140000Z CREATED:20220414T140000Z DESCRIPTION:<p>Very few sub-stellar companions have been found to orbit around main-sequence stars on wide orbits. The long period orbits of these objects are unlikely to be constrained by traditional methods such a...</p> DTSTART;TZID=Asia/Shanghai:20220414T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20220414T140000Z LOCATION: SUMMARY:A comprehensive survey of sub-stellar companions based on combined RV and astrometry method URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1555.htm END:VEVENT BEGIN:VEVENT UID:1554@kiaa.pku.edu.cn DTSTAMP:20220421T100000Z CREATED:20220421T100000Z DESCRIPTION:<p>Galactic winds are a crucial ingredient in galaxy evolution, but the physics of the ubiquitous outflowing high velocity gas seen from rapidly star-forming galaxies remains unknown. I will describe a s...</p> DTSTART;TZID=Asia/Shanghai:20220421T100000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20220421T100000Z LOCATION: SUMMARY:Physics and phenomenology of galactic winds URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1554.htm END:VEVENT BEGIN:VEVENT UID:1553@kiaa.pku.edu.cn DTSTAMP:20220428T160000Z CREATED:20220428T160000Z DESCRIPTION:<p>Host: Wei Cui</p> DTSTART;TZID=Asia/Shanghai:20220428T160000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20220428T160000Z LOCATION: SUMMARY:Resolving fundamental physics and astrophysical problems using multi-messenger signals from extreme-mass-ratio and intermediate-mass-ratio binaries containing a milli-second pulsar URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1553.htm END:VEVENT BEGIN:VEVENT UID:1552@kiaa.pku.edu.cn DTSTAMP:20220512T140000Z CREATED:20220512T140000Z DESCRIPTION:<p>Host: Zheng Cai</p> DTSTART;TZID=Asia/Shanghai:20220512T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20220512T140000Z LOCATION: SUMMARY:A multiwavelength view of HIgh-redshift (proto)clusters URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1552.htm END:VEVENT BEGIN:VEVENT UID:1551@kiaa.pku.edu.cn DTSTAMP:20220519T140000Z CREATED:20220519T140000Z DESCRIPTION:<p>Gravitational wave memory is an outstanding theoretical prediction of general relativity. It may give an insight to fundamental physics such as quantum gravity. Alongwith the development of gravitational wave astronomy, the gravitational wave memory may be detected in the near future. In this talk I will introduce the physical picture of gravitational wave memory and its relation to fundamental...</p> DTSTART;TZID=Asia/Shanghai:20220519T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20220519T140000Z LOCATION: SUMMARY:Gravitational Wave Memory and its stochastic background URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1551.htm END:VEVENT BEGIN:VEVENT UID:1720@kiaa.pku.edu.cn DTSTAMP:20220520T150750Z CREATED:20220520T150750Z DESCRIPTION:<p>We develop a novel semi-analytic spectral fitting approach to quantify the star-formation histories (SFHs) and chemical enrichment histories (ChEHs) of individual galaxies. We construct simple yet general chemical evolution models that account for gas inflow and outflow processes as well as star formation, to investigate the evolution of merger-free star-forming systems. These models are fitted...</p> DTSTART;TZID=Asia/Shanghai:20220525T160000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20220520T150750Z LOCATION: SUMMARY:Semi-analytic spectral fitting: simultaneously modelling the mass accumulation and chemical evolution in MaNGA spiral galaxies URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1720.htm END:VEVENT BEGIN:VEVENT UID:1549@kiaa.pku.edu.cn DTSTAMP:20220521T202426Z CREATED:20220521T202426Z DESCRIPTION:<p>Host: Zheng Cai</p> DTSTART;TZID=Asia/Shanghai:20220526T160000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20220521T202426Z LOCATION: SUMMARY:Quasars in a Neutral Universe URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1549.htm END:VEVENT BEGIN:VEVENT UID:1547@kiaa.pku.edu.cn DTSTAMP:20220521T203145Z CREATED:20220521T203145Z DESCRIPTION:<p>Host: Emmet</p> DTSTART;TZID=Asia/Shanghai:20220602T160000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20220521T203145Z LOCATION: SUMMARY:The importance of pre-processing for cluster galaxies URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1547.htm END:VEVENT BEGIN:VEVENT UID:1548@kiaa.pku.edu.cn DTSTAMP:20220521T203133Z CREATED:20220521T203133Z DESCRIPTION:<p>Host: Yi Mao</p> DTSTART;TZID=Asia/Shanghai:20220609T100000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20220521T203133Z LOCATION: SUMMARY:Similarities in the formation and dynamical evolution between planetary systems, active galactic nuclei, and epicenters of gravitational waves URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1548.htm END:VEVENT BEGIN:VEVENT UID:1550@kiaa.pku.edu.cn DTSTAMP:20220520T150738Z CREATED:20220520T150738Z DESCRIPTION:<p>Host: Haochang Jiang</p> DTSTART;TZID=Asia/Shanghai:20220623T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20220520T150738Z LOCATION: SUMMARY:Unveiling the early stages of planet formation URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1550.htm END:VEVENT BEGIN:VEVENT UID:1546@kiaa.pku.edu.cn DTSTAMP:20220901T150814Z CREATED:20220901T150814Z DESCRIPTION:<p>The James Webb Space Telescope (JWST) is opening a new window of the most distant universe and will unveil the early growth of supermassive black holes (BHs) in the first galaxies.The existence of supermassive massive BHs observed when the universe was younger than one billion years strongly constrains their formation pathway and provides a crucial hint to understand the coevolution between BHs...</p> DTSTART;TZID=Asia/Shanghai:20220915T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20220901T150814Z LOCATION: SUMMARY:The Age of Discovery with JWST: Excavating the First Massive Black Holes and First Galaxies URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1546.htm END:VEVENT BEGIN:VEVENT UID:1545@kiaa.pku.edu.cn DTSTAMP:20220906T110203Z CREATED:20220906T110203Z DESCRIPTION:<p>The Imaging X-ray Polarimetry Explorer (IXPE) mission was launched on December 9, 2021 and has observed a number of galactic and extragalactic X-ray sources. I report here on the IXPE observations of the High Mass X-Ray Binary Cyg X-1. IXPE detected a strong 2-8 keV polarization signal constraining the origin of the X-ray emission and the configuration of matter close to the Cyg X-1 black hole....</p> DTSTART;TZID=Asia/Shanghai:20220922T090000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20220906T110203Z LOCATION: SUMMARY:Black Hole and Magnetar Studies with the Imaging X-ray Polarimetry Explorer URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1545.htm END:VEVENT BEGIN:VEVENT UID:1544@kiaa.pku.edu.cn DTSTAMP:20220922T101726Z CREATED:20220922T101726Z DESCRIPTION:<p>Recent development in computational imaging has led to a series of great discoveries in astronomy. Integrated with advanced computational tools, modern telescopes continue pushing the boundaries of astronomical imaging, making it possible to observe many scientific phenomena in extreme conditions. In this talk, I will introduce a series of innovative computational imaging tools we have develope...</p> DTSTART;TZID=Asia/Shanghai:20220929T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20220922T101726Z LOCATION: SUMMARY:Computational Imaging for Astronomy: from Exoplanets to Black Holes URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1544.htm END:VEVENT BEGIN:VEVENT UID:1543@kiaa.pku.edu.cn DTSTAMP:20220922T102219Z CREATED:20220922T102219Z DESCRIPTION:<p>Ghostly neutrino particles continue to bring surprises to fundamental physics, from their existence to the phenomenon of neutrino oscillation, which implies their nonzero masses. Their exact masses, among the most curious unknowns beyond the Standard Model of particle physics, can soon be probed by the joint analysis of upcoming cosmological surveys including the CSST, Rubin Observatory LSST, P...</p> DTSTART;TZID=Asia/Shanghai:20221013T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20220922T102219Z LOCATION: SUMMARY:Cosmology with Massive Neutrinos URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1543.htm END:VEVENT BEGIN:VEVENT UID:1542@kiaa.pku.edu.cn DTSTAMP:20220922T102813Z CREATED:20220922T102813Z DESCRIPTION:<p>Over the past couple decades, thousands of extra-solar planets have been discovered orbiting other stars. The exoplanets discovered to date exhibit a wide variety of orbital and compositional properties; most are dramatically different from the planets in our own Solar System. Our classical theories for the origins of planetary systems fail to account for the diversity of planets now known. In ...</p> DTSTART;TZID=Asia/Shanghai:20221020T090000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20220922T102813Z LOCATION: SUMMARY:Multi-faceted Views of Planetary Systems URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1542.htm END:VEVENT BEGIN:VEVENT UID:1541@kiaa.pku.edu.cn DTSTAMP:20220922T103514Z CREATED:20220922T103514Z DESCRIPTION:<p>Uniform and precise calibration plays an important role in the current and next-generation surveys. In this talk, I will discuss challenges and opportunities of 1)&nbsp; photometric calibration of wide-field photometric surveys, 2) wavelength calibration of spectroscopic surveys, and 3) flux calibration of slitless spectroscopic surveys in the era of LAMOST and Gaia.BIO2015-Present: Associated Profe...</p> DTSTART;TZID=Asia/Shanghai:20221027T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20220922T103514Z LOCATION: SUMMARY:Towards precise calibrations of wide-field surveys in the era of LAMOST and Gaia URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1541.htm END:VEVENT BEGIN:VEVENT UID:1538@kiaa.pku.edu.cn DTSTAMP:20221026T112108Z CREATED:20221026T112108Z DESCRIPTION:<p>Brown dwarfs are the latest discovered population on the HR diagram. They formed like stars but appearing like gaseous planets, thus bridging the gap between stars and planets. I will briefly introduce the research history of brown dwarfs and summarize the properties of known brown dwarfs. Then, I will explain the new discovered substellar transition zone formed by transitional brown dwarfs, an...</p> DTSTART;TZID=Asia/Shanghai:20221103T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20221026T112108Z LOCATION: SUMMARY:"brown dwarfs, are we stupid or you are just different?" URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1538.htm END:VEVENT BEGIN:VEVENT UID:1540@kiaa.pku.edu.cn DTSTAMP:20221026T104455Z CREATED:20221026T104455Z DESCRIPTION:<p>In this talk, the speaker will briefly review the observing modes of wide-field slitless spectroscopy and near-ultraviolet (NUV) imaging, enabled by the cutting-edge instruments on board current space telescopes, i.e. the Hubble Space Telescope (HST) and the James Webb Space Telescope (JWST). He will first introduce the multiple observing programs that acquired deep near-infrared grism and NUV ...</p> DTSTART;TZID=Asia/Shanghai:20221110T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20221026T104455Z LOCATION: SUMMARY:Space-based Wide-field Slitless Spectroscopy and Near-Ultraviolet Imaging URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1540.htm END:VEVENT BEGIN:VEVENT UID:1719@kiaa.pku.edu.cn DTSTAMP:20221107T135756Z CREATED:20221107T135756Z DESCRIPTION:<p>Understanding the physics of the interstellar medium is critical for understanding star formation and AGN feedback. Line ratio diagnostics diagrams, such as BPT diagrams, have been extensively used to study the ISM. However, their limitations hide inaccuracies of photoionization models, leading to a number of discrepant results in the literature on metallicity, abundance pattern, and correlatio...</p> DTSTART;TZID=Asia/Shanghai:20221111T100000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20221107T135756Z LOCATION: SUMMARY:Towards Precision Astrophysics for Warm Ionized Gas URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1719.htm END:VEVENT BEGIN:VEVENT UID:1539@kiaa.pku.edu.cn DTSTAMP:20221026T104718Z CREATED:20221026T104718Z DESCRIPTION:<p>Modern cosmology is an observational driven science. Two dark components, dark matter and dark energy, are introduced to explain the invisible mass inferred from various astrophysical observations and the accelerated expansion of the Universe. They represent around 95% of the total mass-energy budget of the Universe today. However, little is known about their nature.As a result of the competiti...</p> DTSTART;TZID=Asia/Shanghai:20221117T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20221026T104718Z LOCATION: SUMMARY:Cosmology with spectroscopic surveys URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1539.htm END:VEVENT BEGIN:VEVENT UID:1537@kiaa.pku.edu.cn DTSTAMP:20221026T141643Z CREATED:20221026T141643Z DESCRIPTION:<p>Most galaxies comparable to or larger than the mass of the Milky Way host hot, X-ray emitting atmospheres and central radio sources. Hot atmospheres and radio jets and lobes are the ingredients of radio-mechanical active galactic nucleus (AGN) feedback. About half of the most massive early type galaxies harbour multi-phase filamentary gas, which appears to result from the thermally unstable coo...</p> DTSTART;TZID=Asia/Shanghai:20221124T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20221026T141643Z LOCATION: SUMMARY:Multi-phase gas, accretion, and mechanical AGN feedback in early-type galaxies URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1537.htm END:VEVENT BEGIN:VEVENT UID:1536@kiaa.pku.edu.cn DTSTAMP:20221026T143110Z CREATED:20221026T143110Z DESCRIPTION:<p>Cosmic reionization is the last major phase transition that our Universe goes through. In this milestone, the intergalactic medium transitions from primarily neutral, dark, and cold into mainly ionized, more luminous, and warmer. However, as exciting as the reionization process surely was, many aspects remain unknown, e.g. what are the sources of the ionizing photons? or what is the timeline of...</p> DTSTART;TZID=Asia/Shanghai:20221201T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20221026T143110Z LOCATION: SUMMARY:Unveiling the astrophysics of cosmic reionization in the post-reionization era URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1536.htm END:VEVENT BEGIN:VEVENT UID:1535@kiaa.pku.edu.cn DTSTAMP:20221026T143954Z CREATED:20221026T143954Z DESCRIPTION:<p>In 1997, the EIT telescope aboard the SOHO satellite (from NASA and ESA) discovered a global-scale wave phenomenon associated with solar flares, which was then called “EIT waves” or “solar tsunamis”. The physical nature of “EIT waves” has been debated for decades. The speaker will try to provide an overview of the related research, including recent progress.BIOPeng-Fei Chen is a solar phy...</p> DTSTART;TZID=Asia/Shanghai:20221215T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20221026T143954Z LOCATION: SUMMARY:Solar coronal waves: A debate for two decades URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1535.htm END:VEVENT BEGIN:VEVENT UID:1534@kiaa.pku.edu.cn DTSTAMP:20221026T144240Z CREATED:20221026T144240Z DESCRIPTION:<p>Gravitational wave has become a new window to explore our universe. Among many events detected so far, GW170817 was the first binary neutron star gravitational wave event joint with electromagnetic observations, which revolutionized our understanding of neutron star physics and the origin of kilonova. However, due to a limited detector sensitivity at the high frequency around kHz, we did not ob...</p> DTSTART;TZID=Asia/Shanghai:20221222T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20221026T144240Z LOCATION: SUMMARY:Towards kHz Gravitational Wave Astronomy URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1534.htm END:VEVENT BEGIN:VEVENT UID:1533@kiaa.pku.edu.cn DTSTAMP:20221223T094141Z CREATED:20221223T094141Z DESCRIPTION:<p>The origin of stellar-mass black hole mergers discovered through gravitational waves is being widely debated. Mergers in the disks of active galactic nuclei (AGN) represent a promising source of origin. By modelling the evolution of compact objects in AGN disks, we found that several observational signatures in gravitational wave data are only explained by the AGN channel. Beyond gravitational ...</p> DTSTART;TZID=Asia/Shanghai:20221227T090000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20221223T094141Z LOCATION: SUMMARY:Observational signatures of compact objects in active galactic nuclei URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1533.htm END:VEVENT BEGIN:VEVENT UID:1529@kiaa.pku.edu.cn DTSTAMP:20221223T114306Z CREATED:20221223T114306Z DESCRIPTION:<p>We are facing an exciting era of discovering the nature of dark matter and dark energy with upcoming large-scale surveys, such as Chinese Survey Space Telescope (CSST), Rubin, and Euclid. One of the major analysis methods of the surveys, weak lensing (WL), uses the shape distortion of background sources for detecting the foreground matter distribution. It is a powerful method for studying dark ...</p> DTSTART;TZID=Asia/Shanghai:20221227T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20221223T114306Z LOCATION: SUMMARY:Universe seen through weak gravitational lensing URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1529.htm END:VEVENT BEGIN:VEVENT UID:1528@kiaa.pku.edu.cn DTSTAMP:20221223T114931Z CREATED:20221223T114931Z DESCRIPTION:<p>The spatial clustering of large-scale structures (LSS) offers insights into the expansion history of the Universe and the growth of structures, and are foreseen to tackle the mysteries of the dark energy and dark matter. Precise cosmological constraints with clustering measurements require the 3-D positions (2-D angular position and redshift) of numerous tracers, and a large sample volume. To t...</p> DTSTART;TZID=Asia/Shanghai:20221229T090000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20221223T114931Z LOCATION: SUMMARY:Cosmology with 3D maps of the Universe URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1528.htm END:VEVENT BEGIN:VEVENT UID:1532@kiaa.pku.edu.cn DTSTAMP:20221223T095401Z CREATED:20221223T095401Z DESCRIPTION:<p>In this talk I will discuss promising new opportunities in gravitational wave astronomy as the sensitivity of ground-based gravitational wave detector improves, and when the space-borne detector(s) start their operation. I will use stellar-mass binary black holes, neutron stars and the so-called extreme mass-ratio inspirals as examples of these exciting developments. &nbsp;In the last part of the ta...</p> DTSTART;TZID=Asia/Shanghai:20221230T090000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20221223T095401Z LOCATION: SUMMARY:A New Era of Gravitational Wave Astronomy URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1532.htm END:VEVENT BEGIN:VEVENT UID:1531@kiaa.pku.edu.cn DTSTAMP:20221223T101128Z CREATED:20221223T101128Z DESCRIPTION:<p>Astronomy today is fundamentally different than it was even just a decade ago. Our increasing ability to collect a large amount of data from ever more powerful instruments has enabled many new opportunities. However, such an opportunity also comes with new challenges. The bottleneck stems from the fact that most astronomical observations are inherently high dimension — from “imaging” the Uni...</p> DTSTART;TZID=Asia/Shanghai:20230103T090000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20221223T101128Z LOCATION: SUMMARY:On Modelling Complex Systems in Astronomy URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1531.htm END:VEVENT BEGIN:VEVENT UID:1530@kiaa.pku.edu.cn DTSTAMP:20221223T101721Z CREATED:20221223T101721Z DESCRIPTION:<p>Magnetic field is one of the most important physical quantities regulating the evolution of interstellar medium and star formation in the Milky Way. Despite enormous surveys using techniques of dust polarization, Faraday rotation, and synchrotron polarization to reveal the magnetic field structure of the Milky Way, none of the techniques can give accurate magnetic field strength. Zeeman effect ...</p> DTSTART;TZID=Asia/Shanghai:20230104T090000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20221223T101721Z LOCATION: SUMMARY:Mapping Interstellar Magnetic Field Strength in the Era of FAST, FASTA, and SKA URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1530.htm END:VEVENT BEGIN:VEVENT UID:1527@kiaa.pku.edu.cn DTSTAMP:20230214T114146Z CREATED:20230214T114146Z DESCRIPTION:<p>The analysis and interpretation of stellar oscillations ---asteroseismology --- permits direct observational examination of stellar interiors. In particular, low-degree p-modes, excited through the same&nbsp;stochastic convective mechanism as in our Sun, permit us to draw&nbsp;inferences about the global properties, interior structures, rotational&nbsp;dynamics, and evolutionary fates of field stars. Space-ba...</p> DTSTART;TZID=Asia/Shanghai:20230223T100000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230214T114146Z LOCATION: SUMMARY:Solar-like Oscillations: Past, Present, & Future URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1527.htm END:VEVENT BEGIN:VEVENT UID:1526@kiaa.pku.edu.cn DTSTAMP:20230224T105629Z CREATED:20230224T105629Z DESCRIPTION:<p>The stellar IMF is one of the most important astrophysical distributions and plays vital role in galactic astronomy. Both constant and variable IMFs across different environments have been claimed despite a large number of theoretical and observational efforts. However, the measurement of the IMF in Galactic stellar populations has been limited by the relatively small number of photometrically ...</p> DTSTART;TZID=Asia/Shanghai:20230302T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230224T105629Z LOCATION: SUMMARY:The variation of the stellar initial mass function (IMF) with metallicity and time URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1526.htm END:VEVENT BEGIN:VEVENT UID:1524@kiaa.pku.edu.cn DTSTAMP:20230224T141607Z CREATED:20230224T141607Z DESCRIPTION:<p>super-Earths and mini-Neptunes (shortened as &#39;kepler planets&#39;) are the most abundant type of planets known to us. Currently, their formation channel is under debate.In this talk, I will discuss our attempt to solve a small puzzle in the observations of these planets. We were led to claim that, after formation, each of these planets have scattered and digested a few Mars-massed objects. The smal...</p> DTSTART;TZID=Asia/Shanghai:20230309T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230224T141607Z LOCATION: SUMMARY:Re-investigating A Puzzle in Kepler Planets URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1524.htm END:VEVENT BEGIN:VEVENT UID:1822@kiaa.pku.edu.cn DTSTAMP:20230308T144432Z CREATED:20230308T144432Z DESCRIPTION:<p>Strong magnetic fields such as MHD-Jet SNe could exist in the inner region of the explosive astrophysical site. The phase space of the electrons is quantized inside the magnetic field so that the weak interaction rates deviate from the field-free case. This talk focuses on the (anti)neutrinos absorption process. This process is essential since it determines the opacity of the neutrino and the p...</p> DTSTART;TZID=Asia/Shanghai:20230310T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230308T144432Z LOCATION: SUMMARY:Strong magnetic field impact on the neutrino process inside the SNe explosion URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1822.htm END:VEVENT BEGIN:VEVENT UID:1525@kiaa.pku.edu.cn DTSTAMP:20230224T105806Z CREATED:20230224T105806Z DESCRIPTION:<p>Multiphase gas structure is ubiquitous in our universe. Recent observations suggest that large quantities of cool (10^4 K) gas are detected in the circumgalactic medium (CGM) of galaxy halos, which extends up to a few times of galactic virial radius. In addition, warm gas at a few 10^5 K is found to be tightly associated with the star-forming galaxies, but not the quenched ones. However, the or...</p> DTSTART;TZID=Asia/Shanghai:20230316T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230224T105806Z LOCATION: SUMMARY:Microphysical and non-thermal processes in the circumgalactic medium: turbulence, magnetic fields and cosmic rays URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1525.htm END:VEVENT BEGIN:VEVENT UID:1821@kiaa.pku.edu.cn DTSTAMP:20230313T132041Z CREATED:20230313T132041Z DESCRIPTION:<p>Changing-look (CL) phenomenon can be generally confirmed by the emergence or disappearance of Broad Emission Line, which challenge the understanding of AGN unification paradigm and accretion disk model. Dark Energy Spectroscopic Instrument (DESI) provides a unique opportunity to systematical study CL-AGNs, which enable us to investigate it by cross-matching the spectra of DESI early data and SD...</p> DTSTART;TZID=Asia/Shanghai:20230317T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230313T132041Z LOCATION: SUMMARY:Changing-look AGNs in the Dark Energy Spectroscopic Instrument (DESI) URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1821.htm END:VEVENT BEGIN:VEVENT UID:1523@kiaa.pku.edu.cn DTSTAMP:20230228T095805Z CREATED:20230228T095805Z DESCRIPTION:<p>Active Galactic Nuclei (AGNs) are the brightest sources of electromagnetic radiation in the&nbsp;universe, enabling us to observe them across the cosmos. AGNs are the central parts of galaxies.Most of their brightness results from the accretion of matter by a supermassive black hole&nbsp;(SMBH) at their center. Studying the AGNs informs us about the role of SMBHs in the&nbsp;formation and evolution of galaxie...</p> DTSTART;TZID=Asia/Shanghai:20230323T100000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230228T095805Z LOCATION: SUMMARY:Active Galactic Nuclei: Monsters to Scale or Puzzles to Solve? URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1523.htm END:VEVENT BEGIN:VEVENT UID:1820@kiaa.pku.edu.cn DTSTAMP:20230320T094740Z CREATED:20230320T094740Z DESCRIPTION:<p>It has been more than half a decade since the first joint detection of gravitational wave and its electromagnetic counterparts (GW170817). The physical models on binary-neutron-star (BNS) mergers are continuously challenged by the ongoing observational facts and the progress in simulation. I will be briefly reviewing the history of models for BNS mergers and presenting the efforts we have made ...</p> DTSTART;TZID=Asia/Shanghai:20230324T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230320T094740Z LOCATION: SUMMARY:Models for binary-neutron-star mergers in the multi-messenger era URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1820.htm END:VEVENT BEGIN:VEVENT UID:1522@kiaa.pku.edu.cn DTSTAMP:20230313T094634Z CREATED:20230313T094634Z DESCRIPTION:<p>There are no doubts that high energy astrophysics has opened new views on the Universe and on the many classes of sources that populates the hot and energetic sky. However, in the near future, spectral, timing, and polarimetric observations at high energies are expected to address key scientific questions in fundamental physics.In this seminar, I will first briefly summarise the potential of hi...</p> DTSTART;TZID=Asia/Shanghai:20230330T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230313T094634Z LOCATION: SUMMARY:Not only astrophysics: fundamental physics studies with high energy missions URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1522.htm END:VEVENT BEGIN:VEVENT UID:1819@kiaa.pku.edu.cn DTSTAMP:20230324T105140Z CREATED:20230324T105140Z DESCRIPTION:<p>Supercritical growth of massive/stellar mass seed BHs at high-z universe is believed to be one of the possible solutions to grow the observed supermassive black holes (SMBHs) at z~6. We study the long-term evolution of the global structure of axisymmetric accretion flows onto a black hole (BH) at rates substantially higher than the Eddington value, performing two-dimensional radiation hydrodyna...</p> DTSTART;TZID=Asia/Shanghai:20230331T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230324T105140Z LOCATION: SUMMARY:Supercritical growth of seed BHs at cosmic dawn and co-evolution with host galaxies: a perspective regarding outflows URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1819.htm END:VEVENT BEGIN:VEVENT UID:1521@kiaa.pku.edu.cn DTSTAMP:20230322T142402Z CREATED:20230322T142402Z DESCRIPTION:<p>The first detection of another planet around a Sun-like star marked the beginning of a new era in which our understanding of how planets typically form and the uniqueness of our Solar System were radically upended. We now know that planet formation is incredibly resilient, and produces a diverse myriad of planets around a wide range of stellar types. These remarkable findings tell us that the S...</p> DTSTART;TZID=Asia/Shanghai:20230406T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230322T142402Z LOCATION: SUMMARY:Solving the Mystery of Small Exoplanets through Holistic Characterization URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1521.htm END:VEVENT BEGIN:VEVENT UID:1818@kiaa.pku.edu.cn DTSTAMP:20230403T110606Z CREATED:20230403T110606Z DESCRIPTION:<p>Massive stars are crucial in our understanding of many areas of modern astrophysics. Despite considerable efforts, there remain numerous unanswered questions regarding the formation and evolution of massive stars. Young star clusters are ideal laboratories to gauge stellar theory, because they are believed to be ensembles of co-eval stars with identical initial chemical compositions. However, r...</p> DTSTART;TZID=Asia/Shanghai:20230407T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230403T110606Z LOCATION: SUMMARY:Complicated life of massive stars: the effect of rotation and binarity URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1818.htm END:VEVENT BEGIN:VEVENT UID:1716@kiaa.pku.edu.cn DTSTAMP:20230406T114359Z CREATED:20230406T114359Z DESCRIPTION:<p>Black hole X-ray binaries are bright accreting systems that can undergo apparent state changes on the reasonable timescales for human. These systems are good analogy to their supermassive counterparts: active galactic nuclei. X-ray reflection spectroscopy is a powerful tool to study the accretion geometry under different regimes. In this talk, I will present how we use X-ray reflection spectros...</p> DTSTART;TZID=Asia/Shanghai:20230411T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230406T114359Z LOCATION: SUMMARY:X-ray reflection spectroscopy on black hole X-ray binaries URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1716.htm END:VEVENT BEGIN:VEVENT UID:1520@kiaa.pku.edu.cn DTSTAMP:20230327T095106Z CREATED:20230327T095106Z DESCRIPTION:<p>Coronal magnetic fields are at the heart of most of the unsolved problems in solar physics and of the solar–terrestrial relationship. However, no routine measurements have been carried out for the magnetic field measurement in the solar corona, due to the weakness of its signature. In the past several decades, a number of techniques have been developed for coronal magnetic field diagnostics. I...</p> DTSTART;TZID=Asia/Shanghai:20230413T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230327T095106Z LOCATION: SUMMARY:Coronal magnetic field Measurements URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1520.htm END:VEVENT BEGIN:VEVENT UID:1817@kiaa.pku.edu.cn DTSTAMP:20230406T112409Z CREATED:20230406T112409Z DESCRIPTION:<p>The stellar initial mass function (IMF) is one of the most important assumptions applied in astronomical studies. The stellar populations in the local universe appear to have a universal and invariant IMF which has been adopted as the standard canonical IMF since 1955. However, observations in recent decays suggest that the IMF, in fact, varies in more extreme environments. In this talk, I wil...</p> DTSTART;TZID=Asia/Shanghai:20230414T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230406T112409Z LOCATION: SUMMARY:The environmental dependency of the stellar initial mass function URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1817.htm END:VEVENT BEGIN:VEVENT UID:1715@kiaa.pku.edu.cn DTSTAMP:20230407T093432Z CREATED:20230407T093432Z DESCRIPTION:<p>Anomalous flux ratios between lensed images can provide a key test of the dark matter sub-halo population, and hence the nature of dark matter. However, the observed anomalous flux ratios at radio frequencies can also be the result of systematics associated with our lack of knowledge about the source structure, source variability, propagation effects and microlensing of compact objects within t...</p> DTSTART;TZID=Asia/Shanghai:20230419T110000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230407T093432Z LOCATION: SUMMARY:Galaxy-Scale Strong Gravitational Lensing at High Angular Resolution URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1715.htm END:VEVENT BEGIN:VEVENT UID:1519@kiaa.pku.edu.cn DTSTAMP:20230330T093717Z CREATED:20230330T093717Z DESCRIPTION:<p>The evolution of galaxies is closely connected to the gas environment in which galaxies reside. Traditionally, this tenuous gas that cycles in and out of galaxies has been studied primarily in absorption using quasar spectroscopy. The deployment of large integral field spectrographs at 8 meter telescopes, and in particular MUSE at VLT, has transformed our view of the interplay between the ambie...</p> DTSTART;TZID=Asia/Shanghai:20230420T160000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230330T093717Z LOCATION: SUMMARY:The gas environment of galaxies across 10 billion years URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1519.htm END:VEVENT BEGIN:VEVENT UID:1718@kiaa.pku.edu.cn DTSTAMP:20230328T160355Z CREATED:20230328T160355Z DESCRIPTION:<p>Turbulence is essential to many fundamental processes in protoplanetary disks, including angular momentum transport, dust evolution, and planet migration. I will focus on two instabilities that can drive turbulent motions in outer disks. In the first part of this talk, a series of global 3D non-ideal MHD simulations via Athena++ code will be presented. The outer disk is found to be weakly MRI t...</p> DTSTART;TZID=Asia/Shanghai:20230421T100000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230328T160355Z LOCATION: SUMMARY:Turbulence in outer protoplanetary disks URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1718.htm END:VEVENT BEGIN:VEVENT UID:1816@kiaa.pku.edu.cn DTSTAMP:20230406T112613Z CREATED:20230406T112613Z DESCRIPTION:<p>Fast radio bursts (FRBs) are highly dispersed, millisecond-duration radio bursts prevailing in the universe. Recent observations of a Galactic FRB suggest that at least some FRBs originate from magnetars, but it is unclear whether the majority of cosmological FRBs, especially the actively repeating ones, are produced from the magnetar channel. Until now, more than 800 FRBs have been detected by...</p> DTSTART;TZID=Asia/Shanghai:20230421T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230406T112613Z LOCATION: SUMMARY:A fast radio burst source at a complex magnetized site in a barred galaxy URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1816.htm END:VEVENT BEGIN:VEVENT UID:1714@kiaa.pku.edu.cn DTSTAMP:20230410T152449Z CREATED:20230410T152449Z DESCRIPTION:<p>At the heart of every galaxy cluster is the brightest central galaxy (BCG). The central location of the BCG along with its unique formation history yield the underlying galaxy-dark matter halo connection. This statistical correlation allows us to enhance our understanding of the assembly and evolution of BCGs over cosmic time. However, we gain further insight into the formation and evolution of...</p> DTSTART;TZID=Asia/Shanghai:20230425T100000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230410T152449Z LOCATION: SUMMARY:Unveiling BCGs and their host clusters using the ICL and Satellite Galaxy Populations URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1714.htm END:VEVENT BEGIN:VEVENT UID:1713@kiaa.pku.edu.cn DTSTAMP:20230411T093454Z CREATED:20230411T093454Z DESCRIPTION:<p>I will discuss some recent progress in 21cm line intensity mapping within the SKA cosmology science working group. In particular, we report the first direct detection of the cosmological power spectrum using 21cm line (2301.11943), derived from interferometric observations with the L-band receivers of the MeerKAT radio telescope. I review the challenges in analysing the MeerKAT data and present...</p> DTSTART;TZID=Asia/Shanghai:20230426T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230411T093454Z LOCATION: SUMMARY:21cm Cosmology in the Post-Reionization Universe URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1713.htm END:VEVENT BEGIN:VEVENT UID:1518@kiaa.pku.edu.cn DTSTAMP:20230330T094350Z CREATED:20230330T094350Z DESCRIPTION:<p>It has been suggested that the occurrence rate of hot Jupiters (HJs) in&nbsp;some open clusters might reach several per cent, significantly higher&nbsp;than that of the field. Several models have been proposed to solve this&nbsp;problem but none has been satisfactory. In a binary-rich cluster, the&nbsp;von Zeipel-Lidov-Kozai (ZKL) mechanism may cause the observed high&nbsp;occurrence rate. For planets formed around a s...</p> DTSTART;TZID=Asia/Shanghai:20230427T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230330T094350Z LOCATION: SUMMARY:Formation of hot Jupiters in star clusters URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1518.htm END:VEVENT BEGIN:VEVENT UID:1815@kiaa.pku.edu.cn DTSTAMP:20230406T112726Z CREATED:20230406T112726Z DESCRIPTION:<p>General relativity is currently the standard theory to describe gravity. It has passed all the tests in our Solar System and has been positively supported by astronomy observations including electromagnetic waves from neutron stars and gravitational waves from coalescing compact binary systems. But fundamentally it is incompatible with quantum theory, and there are also the large-scale observat...</p> DTSTART;TZID=Asia/Shanghai:20230428T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230406T112726Z LOCATION: SUMMARY:Alternative theories of gravity and their tests using astronomy observations URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1815.htm END:VEVENT BEGIN:VEVENT UID:1754@kiaa.pku.edu.cn DTSTAMP:20230329T101210Z CREATED:20230329T101210Z DESCRIPTION:<p>The precision measurements from current observational cosmology have established the Lambda-Cold-Dark-Matter (LCDM) model as the standard cosmological model. However, the LCDM model as a pure phenomenological model with six base parameters still calls for a theoretical understanding of underlying mechanisms for the early and late accelerations as well as the nature of dark matter. In this talk,...</p> DTSTART;TZID=Asia/Shanghai:20230510T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230329T101210Z LOCATION: SUMMARY:cosmological tests on fundamental physics URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1071/1754.htm END:VEVENT BEGIN:VEVENT UID:1753@kiaa.pku.edu.cn DTSTAMP:20230507T130645Z CREATED:20230507T130645Z DESCRIPTION:<p>Galaxy structures are fossil records of their assembly history. Modern IFU spectrographs offer the ability to map the spatial distribution of the motions, ages, and chemical abundances of stars in galaxies, which provide unprecedented detailed view of galaxies structures. But the information are still blended along the line-of-sight. Decomposition of galactic structures in a physical way is cha...</p> DTSTART;TZID=Asia/Shanghai:20230510T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230507T130645Z LOCATION: SUMMARY:A dynamical model and structure decomposition of barred galaxies URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1071/1753.htm END:VEVENT BEGIN:VEVENT UID:1517@kiaa.pku.edu.cn DTSTAMP:20230330T094543Z CREATED:20230330T094543Z DESCRIPTION:<p>I will first present an overview of the problem of galaxy formation. I will then turn my attention to some important and robust physical mechanisms that regulate the supply of cold gas to galaxies. I will in the end try to convey the message that the field of galaxy formation simulation would benefit by turning to more physics, rather than parameter, based approach, through exploring additional...</p> DTSTART;TZID=Asia/Shanghai:20230511T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230330T094543Z LOCATION: SUMMARY:Physical Mechanisms Regulating Gas Supply to Galaxies URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1517.htm END:VEVENT BEGIN:VEVENT UID:1814@kiaa.pku.edu.cn DTSTAMP:20230406T113337Z CREATED:20230406T113337Z DESCRIPTION:<p>In the past decade, Galactic Chemical Evolution (GCE) has flourished due to surveys like Gaia, LAMOST, and Galex, which have enabled detailed investigations of stellar abundances. Stellar nucleosynthesis has also made strides in calculating both stable and radioactive isotopes, including the heavy isotopes produced by rapid neutron-capture (r-process). However, the astrophysical sources of r-p...</p> DTSTART;TZID=Asia/Shanghai:20230512T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230406T113337Z LOCATION: SUMMARY:The Evolution of All Stable Isotopes within Galaxies Across Cosmic Time URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1814.htm END:VEVENT BEGIN:VEVENT UID:1755@kiaa.pku.edu.cn DTSTAMP:20230227T163958Z CREATED:20230227T163958Z DESCRIPTION:<p>1)首先介绍近年来脉冲星观测的(P-Pdot)图同国际流行的脉冲星自转减慢的磁偶极辐射理论(标准模型)预言的明显矛盾。其次介绍1982年我们提出的中子超流涡旋体的中微子辐射理论模型。2) 在1982年我们的理论基础上,我们提出了这五十年来天文观测发现的高速中子星的物理起源于我们的 “中子超流涡旋体的中微子辐射喷流模型”。Host: Tipei L</p> DTSTART;TZID=Asia/Shanghai:20230517T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230227T163958Z LOCATION: SUMMARY:脉冲星自转减慢和高速中子星：中子超流涡旋体的中微子辐射及其效应 URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1071/1755.htm END:VEVENT BEGIN:VEVENT UID:1516@kiaa.pku.edu.cn DTSTAMP:20230330T094839Z CREATED:20230330T094839Z DESCRIPTION:<p>Despite the diversity in the histories of individual galaxies, most of them live slow and die fast. I will firstly introduce a systematic exploration of the galaxy-halo connection, aiming to search for deviations in the spatial distribution of galaxies from the simplest halo model prediction. &nbsp;The null detection paves the way for us to identify the key driver of galaxy quenching within the same...</p> DTSTART;TZID=Asia/Shanghai:20230518T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230330T094839Z LOCATION: SUMMARY:A Minimalistic View of How Galaxies Live, Breathe, and Die URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1516.htm END:VEVENT BEGIN:VEVENT UID:1712@kiaa.pku.edu.cn DTSTAMP:20230411T093805Z CREATED:20230411T093805Z DESCRIPTION:<p>A grand challenge for modern astrophysics is to understand star and galaxy formation in the first billion years of cosmic history. In particular, the first generation of stars born in extremely metal-poor/free primordial gas, the so-called population III (Pop III), are believed to have distinct features compared with present-day stars: They are more likely to become massive black holes due thei...</p> DTSTART;TZID=Asia/Shanghai:20230523T160000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230411T093805Z LOCATION: SUMMARY:Binaries of the first stars as progenitors of compact object mergers URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1712.htm END:VEVENT BEGIN:VEVENT UID:1717@kiaa.pku.edu.cn DTSTAMP:20230328T161641Z CREATED:20230328T161641Z DESCRIPTION:<p>Galaxies in the universe are intricately connected to the gas in and around galaxies. Accurately measuring the statistical properties of this gas is crucial for testing modern theories of galaxy formation and evolution. In this talk, I will present our recent efforts to characterize interstellar and circumgalactic media using integral field spectroscopy with high sensitivity in two aspects. 1) ...</p> DTSTART;TZID=Asia/Shanghai:20230524T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230328T161641Z LOCATION: SUMMARY:Toward Accurate Metallicity Measurements in ISM and Distribution of HI in CGM from 3D Spectroscopy URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1717.htm END:VEVENT BEGIN:VEVENT UID:1515@kiaa.pku.edu.cn DTSTAMP:20230330T094953Z CREATED:20230330T094953Z DESCRIPTION:<p>With the rapidly increasing number of newly discovered exoplanets, the characterization of their atmospheres is becoming the new frontier, crucial for distinguishing between different planetary populations and bearing the imprints of planet formation and evolution. To this end, transit spectroscopy has been the most fruitful technique, revealing the atmospheric species for dozens of exoplanets,...</p> DTSTART;TZID=Asia/Shanghai:20230525T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230330T094953Z LOCATION: SUMMARY:A multi-band, multi-resolution view of hot Jupiter atmospheres URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1515.htm END:VEVENT BEGIN:VEVENT UID:1813@kiaa.pku.edu.cn DTSTAMP:20230406T113500Z CREATED:20230406T113500Z DESCRIPTION:<p>The first X-ray source catalog of the Insight-HXMT Galactic Plane (∣b∣ &lt; 10°) Scanning Survey (GPSS) is presented based on the data accumulated from 2017 June to 2021 August. The 4 yr limit sensitivities at main energy bands can reach 8.2 × 10-12 erg s-1 cm2 (2-6 keV), 4.21 × 10-11 erg s-1 cm2 (7-40 keV), and 2.78 × 10-11 erg s-1 cm2 (25-100 keV). More than 1300 sources have been monitored at...</p> DTSTART;TZID=Asia/Shanghai:20230526T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230406T113500Z LOCATION: SUMMARY:The Long-term Monitoring Results of Insight-HXMT in the First 4 yr Galactic Plane Scanning Survey URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1813.htm END:VEVENT BEGIN:VEVENT UID:1867@kiaa.pku.edu.cn DTSTAMP:20230526T095103Z CREATED:20230526T095103Z DESCRIPTION:<p>LCDM is the standard model of modern cosmology with two dark components, dark matter and dark energy. The nature of dark energy and the dark matter structure growth rate can be probed via the large-scale structure (LSS). For this purpose, we observe millions of spectra of galaxies and quasars (QSOs) with spectroscopic galaxy surveys to explore the 3D map of the Universe. Meanwhile, high-resolut...</p> DTSTART;TZID=Asia/Shanghai:20230529T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230526T095103Z LOCATION: SUMMARY:Galaxy/Quasar-Dark-Matter-Halo Connection of DESI: A Generalized Subhalo Abundance Matching Approach for Multiple Tracers URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1867.htm END:VEVENT BEGIN:VEVENT UID:1514@kiaa.pku.edu.cn DTSTAMP:20230330T095115Z CREATED:20230330T095115Z DESCRIPTION:<p>The intracluster medium (ICM) is the largest reservoir of the hot baryons. The centers of the ICM often feature a sharp X-ray surface brightness peak. AGN mechanical feedback from the brightest cluster galaxy is likely preventing the hot ICM from the catastrophic cooling, although the exact feedback process remains poorly understood. A growing number of kiloparsec-scale multiphase filaments hav...</p> DTSTART;TZID=Asia/Shanghai:20230601T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230330T095115Z LOCATION: SUMMARY:Feeding and feedback of the supermassive blackhole in brightest cluster galaxies URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1514.htm END:VEVENT BEGIN:VEVENT UID:1812@kiaa.pku.edu.cn DTSTAMP:20230406T113647Z CREATED:20230406T113647Z DESCRIPTION:<p>Bent radio AGN, with their classic “C” shaped morphology, are a unique class of radio AGNs. These radio sources are often used as signposts of a dense, gaseous medium, such as the intracluster medium (ICM). However, bent sources are found inside and outside cluster environments, raising the question of how environment impacts bent radio AGN morphology. We analyzed new LOw-Frequency Array Two-...</p> DTSTART;TZID=Asia/Shanghai:20230602T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230406T113647Z LOCATION: SUMMARY:A LOFAR Look at Bent Double Lobed Radio Sources: Probing Differences in the Properties of Bent Radio AGNs Inside and Outside of High-z Galaxy Clusters URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1812.htm END:VEVENT BEGIN:VEVENT UID:1866@kiaa.pku.edu.cn DTSTAMP:20230602T135216Z CREATED:20230602T135216Z DESCRIPTION:<p>We present the results of a Damped Lyman α (DLA) system survey in the Dark Energy Spectroscopic Instrument (DESI) Survey Data release 1. The concordance DLA catalog combines the prediction from two fully automated techniques: the convolutional neural network (CNN) model and the Gaussian Process (GP) model. For each absorber, we obtain an accurate measurement of the redshift, the HI column dens...</p> DTSTART;TZID=Asia/Shanghai:20230605T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230602T135216Z LOCATION: SUMMARY:The DESI Damped Lyα System Survey: Data Release 1 URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1866.htm END:VEVENT BEGIN:VEVENT UID:1512@kiaa.pku.edu.cn DTSTAMP:20230330T095559Z CREATED:20230330T095559Z DESCRIPTION:<p>As the expansion of the universe continues to accelerate, the internal secular evolution of galaxies becomes more important as the distance between galaxies generally increases. The largest galaxies in the local group provide an ideal laboratory due to their proximity to study the secular evolution processes driven by internal dynamical structures, such as a bar and spiral arms. I will review t...</p> DTSTART;TZID=Asia/Shanghai:20230608T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230330T095559Z LOCATION: SUMMARY:Structure and dynamics of the local group galaxies URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1512.htm END:VEVENT BEGIN:VEVENT UID:1513@kiaa.pku.edu.cn DTSTAMP:20230330T095559Z CREATED:20230330T095559Z DESCRIPTION:<p>As the expansion of the universe continues to accelerate, the internal secular evolution of galaxies becomes more important as the distance between galaxies generally increases. The largest galaxies in the local group provide an ideal laboratory due to their proximity to study the secular evolution processes driven by internal dynamical structures, such as a bar and spiral arms. I will review t...</p> DTSTART;TZID=Asia/Shanghai:20230608T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230330T095559Z LOCATION: SUMMARY:Structure and dynamics of the local group galaxies URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1513.htm END:VEVENT BEGIN:VEVENT UID:1711@kiaa.pku.edu.cn DTSTAMP:20230602T130743Z CREATED:20230602T130743Z DESCRIPTION:<p>Evolutions of stars, black hole accretion as well as interactions&nbsp;between stars and black holes play an important role in various&nbsp;astrophysical systems, such as supernova, X-ray binaries, AGNs as well&nbsp;as various transient phenomena. &nbsp;I will discuss some long standing&nbsp;issues related to massive star and black hole systems. Then I will&nbsp;describe some examples on how we can make progress on some of ...</p> DTSTART;TZID=Asia/Shanghai:20230609T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230602T130743Z LOCATION: SUMMARY:Radiation MagnetoHydrodynamic Simulations of Astrophysical Systems: from massive stars to black holes URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1711.htm END:VEVENT BEGIN:VEVENT UID:1811@kiaa.pku.edu.cn DTSTAMP:20230406T113811Z CREATED:20230406T113811Z DESCRIPTION:<p>The 3D structure and extinction law are studied for the Taurus, Orion, Perseus and California molecular clouds (MCs) based on the LAMOST and APOGEE spectroscopy. Extinctions are calculated from color excess derived from the Blue Edge methods. In combination with the distance from the Gaia, &nbsp;a 3D extinction map and the structure of these MCs can be retrieved and the clouds that overlap in the sk...</p> DTSTART;TZID=Asia/Shanghai:20230609T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230406T113811Z LOCATION: SUMMARY:3D Structure and Extinction of Nearby Molecular Clouds URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1811.htm END:VEVENT BEGIN:VEVENT UID:1752@kiaa.pku.edu.cn DTSTAMP:20230517T141615Z CREATED:20230517T141615Z DESCRIPTION:<p>In this talk, I will discuss two ongoing spectroscopic programs to study the stellar streams in our Milky Way and highlight a few latest scientific results from these two programs. The Southern Stellar Stream Spectroscopic Survey (S5), started in 2018, is the first systematic program pursuing a complete census of known streams in the Southern Hemisphere. The science results from S5 include a ho...</p> DTSTART;TZID=Asia/Shanghai:20230612T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230517T141615Z LOCATION: SUMMARY:The Power of Milky Way's Stellar Streams Enabled by Multi-Object Spectroscopic Surveys URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1071/1752.htm END:VEVENT BEGIN:VEVENT UID:1865@kiaa.pku.edu.cn DTSTAMP:20230609T111818Z CREATED:20230609T111818Z DESCRIPTION:<p>As fuel feeding supermassive black hole and star formation, cold molecular gas is the key to many fundamental processes in galaxy evolution. In the last decade and especially with the advent of Atacama Large Millimeter/submillimeter Array (ALMA), it has become feasible to spatially resolve giant molecular clouds (GMCs) in a large number and a wide variety of galaxies. Here, I summarise my work ...</p> DTSTART;TZID=Asia/Shanghai:20230612T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230609T111818Z LOCATION: SUMMARY:Cold molecular gas (cloud) properties across different types of galaxies URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1865.htm END:VEVENT BEGIN:VEVENT UID:1710@kiaa.pku.edu.cn DTSTAMP:20230605T162416Z CREATED:20230605T162416Z DESCRIPTION:<p>As an important tracer of star formations and chemical enrichment in galaxies, HII regions play a fundamental role in our understanding of galaxy evolution. To infer the physical conditions of HII regions in galaxies, many diagnostic methods based on the emission-line spectra of the ionized gas have been proposed. Meanwhile, people have constructed theoretical models to describe the ionization ...</p> DTSTART;TZID=Asia/Shanghai:20230613T100000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230605T162416Z LOCATION: SUMMARY:Modeling realistic HII regions: Constraints from multidimensional nebular diagnostics URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1710.htm END:VEVENT BEGIN:VEVENT UID:1810@kiaa.pku.edu.cn DTSTAMP:20230406T114048Z CREATED:20230406T114048Z DESCRIPTION:<p>For many scientific applications the forward model consists of an expensive black-box simulator without easy access to gradients of the forward model. In such a situation, inference can be challenging, with standard gradient-free sampling algorithms requiring an intractably large number of serial model evaluations. In this talk I will introduce the flow annealed Kalman filter for approximate Ba...</p> DTSTART;TZID=Asia/Shanghai:20230616T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230406T114048Z LOCATION: SUMMARY:Flow Annealed Kalman Filters: Gradient-free inference for expensive forward models URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1810.htm END:VEVENT BEGIN:VEVENT UID:1864@kiaa.pku.edu.cn DTSTAMP:20230619T092253Z CREATED:20230619T092253Z DESCRIPTION:<p>As the witnesses of the early Universe, dwarf galaxies, especially the low-mass ones (total mass ≤ 10^9 M⊙), carry the imprint of essential physical processes, from the formation of the first stars to the formation of the first galaxies, which shaped the universe into the one we observe today. I will show the power of searching dwarf galaxy debris in the low-metallicity Milky Way, and how the...</p> DTSTART;TZID=Asia/Shanghai:20230619T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230619T092253Z LOCATION: SUMMARY:Deep Learning the Local Group URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1864.htm END:VEVENT BEGIN:VEVENT UID:1709@kiaa.pku.edu.cn DTSTAMP:20230608T103639Z CREATED:20230608T103639Z DESCRIPTION:<p>The distance-inclination degeneracy limits gravitational-wave parameter estimation of compact binary mergers. Such a degeneracy can be partially broken by including higher-order modes or precession when modeling the waveform of a binary that contains a black hole. But what about binary neutron stars, for which these effects are suppressed? In this talk, I will introduce a new parameterization o...</p> DTSTART;TZID=Asia/Shanghai:20230628T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230608T103639Z LOCATION: SUMMARY:Breaking bad degeneracies with Love relations: Improving gravitational-wave measurements through universal relations URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1709.htm END:VEVENT BEGIN:VEVENT UID:1708@kiaa.pku.edu.cn DTSTAMP:20230616T165546Z CREATED:20230616T165546Z DESCRIPTION:<p>Dark matter — established via various cosmological and astronomical&nbsp;observations — is a significant constituent of our Universe and remains&nbsp;one of the most outstanding mysteries of modern physics. The mass range&nbsp;of potential dark matter candidates covers more than 30 orders of&nbsp;magnitude. In the past, researchers have primarily focused on searching&nbsp;for GeV-TeV dark matter (WIMP) via nuclear re...</p> DTSTART;TZID=Asia/Shanghai:20230628T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230616T165546Z LOCATION: SUMMARY:Kamioka CryoLab: A Future Low-background Underground Facility for Cryogenic Light Dark Matter Searches URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1708.htm END:VEVENT BEGIN:VEVENT UID:1707@kiaa.pku.edu.cn DTSTAMP:20230616T171303Z CREATED:20230616T171303Z DESCRIPTION:<p>One commonly accepted idea for the origin of the large-scale structure in the Universe is that the minute quantum fluctuations were stretched to macroscopic scales as a consequence of nearly exponential expansion of spacetime during the “cosmic inflation”. Cosmic inflation predicts primordial density fluctuations that are consistent with the observed CMB temperature fluctuations. It also pred...</p> DTSTART;TZID=Asia/Shanghai:20230629T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230616T171303Z LOCATION: SUMMARY:Exploring the Universe with Space Transition-edge Sensor: from Cosmic Microwave to X-ray Background URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1707.htm END:VEVENT BEGIN:VEVENT UID:1750@kiaa.pku.edu.cn DTSTAMP:20230627T134703Z CREATED:20230627T134703Z DESCRIPTION:<p>In this talk, I will present the Adaptive Optics Facility (AOF) and the MUSE instrument at VLT/UT4. &nbsp;AOF is the new generation cutting-edge adaptive optics system for the instruments at UT4. &nbsp;With the high-performance deformable secondary mirror and 4 laser guide stars system, AOF enables to correct atmospheric turbulence effects on the optical wavelength, facilitating the Multi-Unit Spectrosco...</p> DTSTART;TZID=Asia/Shanghai:20230629T160000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230627T134703Z LOCATION: SUMMARY:Adaptive Optics Facility and MUSE at the VLT-UT4 URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1071/1750.htm END:VEVENT BEGIN:VEVENT UID:1809@kiaa.pku.edu.cn DTSTAMP:20230406T114221Z CREATED:20230406T114221Z DESCRIPTION:<p>The gas surrounding galaxies is known as the circumgalactic medium (CGM) which is considered to be deeply coupled with the evolution of galaxies. Although lots of works have been done, how galaxies co-evolve with the CGM is still poorly understood. To explore the CGM-galaxy ecosystem, especially the baryon cycle, we conduct observations on the high redshift CGM. First, we study the gas surroun...</p> DTSTART;TZID=Asia/Shanghai:20230630T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230406T114221Z LOCATION: SUMMARY:Revealing the Recycled inflow of the massive galaxies at high redshift URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1809.htm END:VEVENT BEGIN:VEVENT UID:1706@kiaa.pku.edu.cn DTSTAMP:20230628T134911Z CREATED:20230628T134911Z DESCRIPTION:<p>In this talk I will discuss the geometry, structure and morphological transformation of star-forming and quiescent galaxies from the peak of cosmic star formation to the present day. &nbsp;Resolved observations from multiple wavelengths and tracers enable us to reconstruct where stars form within galaxies and how stellar distributions are assembled, while simultaneously revealing insights into the e...</p> DTSTART;TZID=Asia/Shanghai:20230703T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230628T134911Z LOCATION: SUMMARY:Structural evolution of galaxies since cosmic noon URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1706.htm END:VEVENT BEGIN:VEVENT UID:1863@kiaa.pku.edu.cn DTSTAMP:20230628T110422Z CREATED:20230628T110422Z DESCRIPTION:<p>Obtaining physical information from the integral spectra of unresolved stellar populations is the key to investigating a galaxy&#39;s evolution, during which modelling the levels of heavy elements within the galaxy over time is fundamental but often missed. While most studies of chemical evolution tend to focus on gas and stellar metallicities separately, these quantities can – and should – be tr...</p> DTSTART;TZID=Asia/Shanghai:20230703T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230628T110422Z LOCATION: SUMMARY:Modelling the formation and evolution of galaxies through semi-analytic spectral fitting URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1863.htm END:VEVENT BEGIN:VEVENT UID:1751@kiaa.pku.edu.cn DTSTAMP:20230625T102929Z CREATED:20230625T102929Z DESCRIPTION:<p>In this project, we aim to understand structures in galaxies from a deconstructive perspective. In a series of papers, we have developed an accurate, efficient, and unsupervised way that extracts structures of simulated galaxies in kinematics. We successfully identify kinematically-derived bulge, disk, and halo structures that have clear physical formation mechanisms in the IllustrisTNG simulat...</p> DTSTART;TZID=Asia/Shanghai:20230703T153000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230625T102929Z LOCATION: SUMMARY:Deconstruction of galaxies: bulges, disks, and stellar halos --- insights from the IllustrisTNG Simulations URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1071/1751.htm END:VEVENT BEGIN:VEVENT UID:1704@kiaa.pku.edu.cn DTSTAMP:20230630T160724Z CREATED:20230630T160724Z DESCRIPTION:<p>I will present an overview of the JWST NIRCam wide-field slitless spectroscopy (WFSS). This observing mode is highly efficient in spectroscopically confirming galaxies in the Epoch of Reionization through rest-frame optical emission lines (e.g., [OIII] and Hα). With NIRCam WFSS, galaxies at z&gt;6 can be easily detected and confirmed with ~10-min integration. The following studies will be highlig...</p> DTSTART;TZID=Asia/Shanghai:20230704T093000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230630T160724Z LOCATION: SUMMARY:JWST/NIRCam Wide-Field Slitless Spectroscopy: Current Status and Prospects as a Powerful Redshift Machine URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1704.htm END:VEVENT BEGIN:VEVENT UID:1705@kiaa.pku.edu.cn DTSTAMP:20230630T141353Z CREATED:20230630T141353Z DESCRIPTION:<p>The Milky Way experienced several merger events which left their imprints on the stellar halo. In particular, it is known that a major merger happened during the Galaxy’s first Gyrs and, likely, perturbed its disc-shape structure. In order to fully understand the effects of such an event, we need to know the chemical and dynamical characteristics of the young Milky Way, i.e. before the major m...</p> DTSTART;TZID=Asia/Shanghai:20230704T104500 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230630T141353Z LOCATION: SUMMARY:GASTRO library: studying substructures of the Milky Way stellar halo with SPH + N-body single merger models URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1705.htm END:VEVENT BEGIN:VEVENT UID:1703@kiaa.pku.edu.cn DTSTAMP:20230704T155727Z CREATED:20230704T155727Z DESCRIPTION:<p>&quot;Are we alone?&quot; has been a fundamental question since the dawn of civilization, and we have always been curious about the possibility of extraterrestrial life. Since the discovery of the first exoplanet, a hot Jupiter orbiting a sun-like star named 52 Peg, in 1995, the number of exoplanet detections has grown exponentially. To date, we have discovered over 5000 exoplanets, each with unique prop...</p> DTSTART;TZID=Asia/Shanghai:20230705T160000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230704T155727Z LOCATION: SUMMARY:Searching for Earth 2.0s and Life in the Universe URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1703.htm END:VEVENT BEGIN:VEVENT UID:1696@kiaa.pku.edu.cn DTSTAMP:20230808T152802Z CREATED:20230808T152802Z DESCRIPTION:<p>The field of Artificial Intelligence (AI) has taken great strides in recent years, particularly with advancements in Large Language Models (LLMs) like ChatGPT. This progress has stirred much public curiosity. However, general-purpose language models like ChatGPT sometimes &#39;hallucinate&#39; or invent non-existent information when handling specialized subjects. This tendency has led to a common belie...</p> DTSTART;TZID=Asia/Shanghai:20230713T153000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230808T152802Z LOCATION: SUMMARY:Can Artificial Intelligence Generate Meaningful Scientific Hypotheses? URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1696.htm END:VEVENT BEGIN:VEVENT UID:1702@kiaa.pku.edu.cn DTSTAMP:20230712T111828Z CREATED:20230712T111828Z DESCRIPTION:<p>After more than two years of scanning the sky the eROSITA X-ray telescope aboard SRG orbital observatory produced the best ever X-ray maps of the sky and discovered more than three million X-ray sources, of which about 20% are stars with active coronas in the Milky Way, and most of the rest are galaxies with active nuclei, quasars and clusters of galaxies. eROSITA detected over 1000 sources tha...</p> DTSTART;TZID=Asia/Shanghai:20230718T133000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230712T111828Z LOCATION: SUMMARY:SRG/eROSITA all-sky survey: from stellar flares and neutrino sources to cosmology URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1702.htm END:VEVENT BEGIN:VEVENT UID:1698@kiaa.pku.edu.cn DTSTAMP:20230808T152140Z CREATED:20230808T152140Z DESCRIPTION:<p>This talk is on dynamics of the solar system, we show strong evidence that an alien planet once invaded our solar system. There is a long unsolved mystery concerning a group of asteroids called Jupiter Trojans. Mathematically, there are two symmetric relative equilibrium points for the Sun-Jupiter system, L4 and L5. However, there is a large difference in numbers of observed asteroids: L4 has 6...</p> DTSTART;TZID=Asia/Shanghai:20230724T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230808T152140Z LOCATION: SUMMARY:Invasion of Alien Planet URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1698.htm END:VEVENT BEGIN:VEVENT UID:1699@kiaa.pku.edu.cn DTSTAMP:20230808T151709Z CREATED:20230808T151709Z DESCRIPTION:<p>Dwarf galaxies provide unique and rich constraints on galaxy formation and the nature of dark matter. However, the galaxy-halo mass connection at these low-masses still have a lot of uncertainty. &nbsp;With an influx of newly discovered dwarfs near and far, it is becoming increasingly important to place dwarf galaxies in a cosmological context and model their evolution in a self-consistent way. I wi...</p> DTSTART;TZID=Asia/Shanghai:20230726T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230808T151709Z LOCATION: SUMMARY:Modeling dwarf galaxy formation with UniverseMachine URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1699.htm END:VEVENT BEGIN:VEVENT UID:1697@kiaa.pku.edu.cn DTSTAMP:20230808T152402Z CREATED:20230808T152402Z DESCRIPTION:<p>Traditional analysis of cosmological Large Scale Structures assumes that the likelihood is Gaussian, which unfortunately is not optimal and may even be biased in the non linear regime. Simulation Based Inference (SBI), also known as Likelihood Free Inference or Implicit Likelihood Inference, directly models the Bayesian optimal posterior, but typically needs a large number of simulations to con...</p> DTSTART;TZID=Asia/Shanghai:20230728T100000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230808T152402Z LOCATION: SUMMARY:Towards Optimal Inference of Cosmological Large Scale Structures with Neural Quantile Estimation URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1697.htm END:VEVENT BEGIN:VEVENT UID:1701@kiaa.pku.edu.cn DTSTAMP:20230808T150732Z CREATED:20230808T150732Z DESCRIPTION:<p>Weak gravitational lensing by large-scale structure, also known as cosmic shear, plays a crucial role in modern cosmology, powerfully probing the Universe&#39;s matter distribution. Interestingly, recent cosmic shear results from the KiDS, DES, and HSC surveys show an intriguing discrepancy with Planck&#39;s CMB observations concerning the amplitude of matter fluctuations. In this talk, I will discuss ...</p> DTSTART;TZID=Asia/Shanghai:20230811T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230808T150732Z LOCATION: SUMMARY:KiDS-1000: Cosmology with improved cosmic shear measurements URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1701.htm END:VEVENT BEGIN:VEVENT UID:1700@kiaa.pku.edu.cn DTSTAMP:20230808T151059Z CREATED:20230808T151059Z DESCRIPTION:<p>Gaia data release 3 (GDR3) provides a trove of 220 million low-resolution BP/RP (XP) fluxcalibrated spectra. In order to properly exploit the XP spectra, we need to accurately model them as a function of stellar type, extinction and distance. We build a machine-learning model based on the subset of XP stars with LAMOST LRS counterparts, whose stellar types are precisely determined by the higher...</p> DTSTART;TZID=Asia/Shanghai:20230814T150000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230808T151059Z LOCATION: SUMMARY:Inferred stellar parameters from 220 million XP spectra using an empirical forward model URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1700.htm END:VEVENT BEGIN:VEVENT UID:1695@kiaa.pku.edu.cn DTSTAMP:20230810T110307Z CREATED:20230810T110307Z DESCRIPTION:<p>Over the past two decades, our knowledge of the Solar System’s transneptunian region (often called the Kuiper Belt) has been gradually increasing. Observational surveys have greatly expanded the inventory of Trans-Neptunian Objects (TNOs), which are distant icy bodies thought to be relics from the giant planet formation era.In the distant Kuiper Belt, several striking features seem to challeng...</p> DTSTART;TZID=Asia/Shanghai:20230815T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230810T110307Z LOCATION: SUMMARY:Dynamics of Transneptunian Objects under the Influence of a Rogue Planet (Thesis Talk) 海王星外天体在流浪行星影响下的动力学 URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1695.htm END:VEVENT BEGIN:VEVENT UID:1694@kiaa.pku.edu.cn DTSTAMP:20230814T104807Z CREATED:20230814T104807Z DESCRIPTION:<p>Prof. John Wise from Georgia Tech and the director at the Center for Relativistic Astrophysics (CRA)Host: Song Huan</p> DTSTART;TZID=Asia/Shanghai:20230816T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230814T104807Z LOCATION: SUMMARY:Simulating the first stars, galaxies, and black holes in the Universe URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1694.htm END:VEVENT BEGIN:VEVENT UID:1693@kiaa.pku.edu.cn DTSTAMP:20230815T142909Z CREATED:20230815T142909Z DESCRIPTION:<p>GYRE is an open-source stellar oscillation code that calculates wave frequencies and functions for the (unforced) natural modes of an input stellar model. Recently, the code&#39;s capabilities have been extended to encompass forced oscillations, allowing it to calculate the interior perturbations of a star caused by the gravitational field of a companion. The standard approach to simulating tides i...</p> DTSTART;TZID=Asia/Shanghai:20230818T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230815T142909Z LOCATION: SUMMARY:How tides change the orbit of binaries and a new open-source code, gyre_tides, to model stellar tides 潮汐如何改变双星系统的轨道以及介绍一个新的用于计算恒星潮汐的开源代码gyre-tides URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1693.htm END:VEVENT BEGIN:VEVENT UID:1692@kiaa.pku.edu.cn DTSTAMP:20230815T165045Z CREATED:20230815T165045Z DESCRIPTION:<p>Active galactic nuclei (AGN), which represent the rapidly growing phase of the&nbsp;supermassive black holes (SMBH), radiate across the whole electromagnetic spectrum fromradio to Gamma-rays. X-rays, which are seen in most AGN, are an important tool to study the&nbsp;physics of AGN. Thanks to the launch of NuSTAR in 2012, we are able to probe AGN properties&nbsp;in the hard X-ray regime for the first time. In...</p> DTSTART;TZID=Asia/Shanghai:20230821T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230815T165045Z LOCATION: SUMMARY:Active Galactic Nuclei in the NuSTAR Era URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1692.htm END:VEVENT BEGIN:VEVENT UID:1691@kiaa.pku.edu.cn DTSTAMP:20230821T092853Z CREATED:20230821T092853Z DESCRIPTION:<p>The formation and evolution of planetary systems are critical links in understanding how we came to be. With an eye on exoplanet demography, my talk outlines two observational approaches for studying planet formation and evolution. In the first approach, I focus on the aftermath of planet formation by estimating the occurrence rate of hot jupiters with an inner companion planet through a system...</p> DTSTART;TZID=Asia/Shanghai:20230824T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230821T092853Z LOCATION: SUMMARY:Uncovering the Formation and Evolution of Planetary Systems: The Architecture of Hot Jupiter Systems and the Search for Young Planets URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1691.htm END:VEVENT BEGIN:VEVENT UID:1690@kiaa.pku.edu.cn DTSTAMP:20230824T133257Z CREATED:20230824T133257Z DESCRIPTION:<p>Studying the distribution and properties of hot gas around galaxies (hot CGM) is helpful to understand the galaxy evolution and explain the bi-modality of the galaxy population, but its observation is challenging. In my talk, I will introduce how eROSITA X-ray all-sky survey allow us to study the hot CGM with a large sample of galaxies and provide more general relationship between CGM and galax...</p> DTSTART;TZID=Asia/Shanghai:20230830T150000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230824T133257Z LOCATION: SUMMARY:eROSITA All Sky Survey: X-ray emission around galaxies URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1690.htm END:VEVENT BEGIN:VEVENT UID:1687@kiaa.pku.edu.cn DTSTAMP:20230831T112924Z CREATED:20230831T112924Z DESCRIPTION:<p>Galaxies are not isolated islands in the Universe. Across the cosmic time, they assemble and evolve while frequently interacting with the ambient cosmic gas, namely the circum- and inter-galactic media (CGM/IGM), which belongs to the large-scale structure named the cosmic web. However, specifically what roles this large-scale environment plays in galaxy formation remains as a key open question ...</p> DTSTART;TZID=Asia/Shanghai:20230907T100000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230831T112924Z LOCATION: SUMMARY:Probing Galaxy Formation in the Cosmic Web at z~3: A View with the James Webb Space Telescope URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1687.htm END:VEVENT BEGIN:VEVENT UID:1688@kiaa.pku.edu.cn DTSTAMP:20230830T101629Z CREATED:20230830T101629Z DESCRIPTION:<p>The Pre-Main-Sequence stellar evolution is shaped by the mass accretion process, which is known for its highly unstable nature. In fact, most of the stellar mass is gathered during &quot;episodic accretion&quot; bursts, which solved the luminosity spread of young clusters. As a consequence of the accretion bursts, eruptive behaviours have been observed on Young Stellar Objects (YSO), such as the decades-...</p> DTSTART;TZID=Asia/Shanghai:20230908T110000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230830T101629Z LOCATION: SUMMARY:Eruptive YSOs in the large-survey era URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1688.htm END:VEVENT BEGIN:VEVENT UID:1686@kiaa.pku.edu.cn DTSTAMP:20230904T095251Z CREATED:20230904T095251Z DESCRIPTION:<p>Study of stellar objects embedded in AGN accretion disks around massive Black Holes have been motivated by i) the disk of stars that formed in-situ in the galactic center; ii) the redshift independence of metallicity in AGN disks, which also suggest in-situ pollution; iii) massive LIGO-Virgo gravitational wave sources that possibly evolved in a gas rich environment, and iv) quasi-periodic erupt...</p> DTSTART;TZID=Asia/Shanghai:20230911T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230904T095251Z LOCATION: SUMMARY:Stellar Object Formation and Evolution in AGN Disks URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1686.htm END:VEVENT BEGIN:VEVENT UID:1689@kiaa.pku.edu.cn DTSTAMP:20230828T135300Z CREATED:20230828T135300Z DESCRIPTION:<p>AGN feedback is a critical component in modern simulations of galaxy evolution. In dwarf galaxies, both observational and theoretical evidence of AGN feedback are accumulating, shedding new light on the evolution of dwarf galaxies. In massive galaxies, luminous quasars likely drive the most energetic outflows, making them the best laboratories to examine quasar feedback closely across cosmic ti...</p> DTSTART;TZID=Asia/Shanghai:20230915T100000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230828T135300Z LOCATION: SUMMARY:AGN Feedback in Dwarfs and Giants Near and Far URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1689.htm END:VEVENT BEGIN:VEVENT UID:1862@kiaa.pku.edu.cn DTSTAMP:20230918T095520Z CREATED:20230918T095520Z DESCRIPTION:<p>Speaker: Yan LiangTitle: Lensing, Dynamics &amp; Mass Distribution of the Early-Type GalaxyAbstract:The mass structure, as one of the most important properties of early-type galaxy, is associated with the galactic formation and evolution. Nowadays, the gravitational lensing at the galaxy scale and dynamics information of the galaxy have been widely used to constrain the galaxy mass structure. In th...</p> DTSTART;TZID=Asia/Shanghai:20230919T153000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230918T095520Z LOCATION: SUMMARY:Yan Liang and Ruizhe Feng URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1862.htm END:VEVENT BEGIN:VEVENT UID:1511@kiaa.pku.edu.cn DTSTAMP:20230904T094243Z CREATED:20230904T094243Z DESCRIPTION:<p>Motivated by its applications to the interior dynamics of planets, the problem of thermal convection in rapidly rotating, self-gravitating fluid bodies has been widely modeled in spheres or spherical shells, which implicitly neglects the flattening effect due to the centrifugal force. However, recent Juno and Cassini missions have measured the gravitational fields of Jupiter and Saturn with ext...</p> DTSTART;TZID=Asia/Shanghai:20230921T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230904T094243Z LOCATION: SUMMARY:Thermal convection in rapidly rotating oblate spheroidal planets URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1511.htm END:VEVENT BEGIN:VEVENT UID:1808@kiaa.pku.edu.cn DTSTAMP:20230918T100002Z CREATED:20230918T100002Z DESCRIPTION:<p>Polar ring galaxies (PRGs) exhibit an extendedring of material oriented perpendicular to the main disk, which provide crucialclues for galaxy evolutionand dynamics, such as galaxy interaction and gas accretion. In the WALLABY Pilot Data Release 1, we found two potential polar ring galaxies: NGC 4632 and NGC 6156. We used the iDaVIE virtual reality software todecompose gas within the disk and ri...</p> DTSTART;TZID=Asia/Shanghai:20230922T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230918T100002Z LOCATION: SUMMARY:WALLABY detects two Polar Ring Galaxies URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1808.htm END:VEVENT BEGIN:VEVENT UID:1861@kiaa.pku.edu.cn DTSTAMP:20230920T102909Z CREATED:20230920T102909Z DESCRIPTION:<p>The JWST has uncovered a large population of UV-bright galaxies at redshifts above ~10, which surpasses the predictions from a range of theoretical models developed based on lower redshift galaxies. While various solutions have been proposed focusing on systematically increasing the UV photon yield in high-redshift galaxies, I will discuss in this talk an alternate solution from UV variability....</p> DTSTART;TZID=Asia/Shanghai:20230926T153000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230920T102909Z LOCATION: SUMMARY:Implication of UV variability for the abundance of bright galaxies at cosmic dawn 紫外光度波动对宇宙黎明时明亮星系丰度的影响 URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1861.htm END:VEVENT BEGIN:VEVENT UID:1510@kiaa.pku.edu.cn DTSTAMP:20230904T145748Z CREATED:20230904T145748Z DESCRIPTION:<p>In 2013, the IceCube Neutrino Observatory at the South Pole discovered an extragalactic high-energy diffuse neutrino flux, opening a new era for neutrino astronomy. However, the origin of this flux remains mostly unresolved to date. Identification of astrophysical neutrino sources would be the smoking evidence to unveil the century-long puzzle on origin of cosmic rays. Being neutral and interac...</p> DTSTART;TZID=Asia/Shanghai:20230928T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230904T145748Z LOCATION: SUMMARY:Cosmic neutrinos: a new window into the extreme Universe URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1510.htm END:VEVENT BEGIN:VEVENT UID:1860@kiaa.pku.edu.cn DTSTAMP:20231007T150852Z CREATED:20231007T150852Z DESCRIPTION:<p>We investigate obstacles of superluminal “warp drive” travels from interactions with interstellar matter and from curvature effects. The effect of collision of interstellar dust particles and photons with the spacecraft will all lead to a pressure proportional to the apparent velocity of the spaceship vs. The force exerted on the spacecraft from the curvature effect has two non-trivial compon...</p> DTSTART;TZID=Asia/Shanghai:20231010T153000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231007T150852Z LOCATION: SUMMARY:Obstacles from interstellar matter and distortion for warp drive travel URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1860.htm END:VEVENT BEGIN:VEVENT UID:1509@kiaa.pku.edu.cn DTSTAMP:20230904T150207Z CREATED:20230904T150207Z DESCRIPTION:<p>The recent breakthrough in the detection of gravitational waves (GWs) from merging black hole (BH) and neutron star (NS) binaries by advanced LIGO/Virgo has generated renewed interest in understanding the formation mechanisms of merging compact binaries, from the evolution of massive stellar binaries and triples in the galactic fields, dynamical interactions in dense star clusters to binary mer...</p> DTSTART;TZID=Asia/Shanghai:20231012T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230904T150207Z LOCATION: SUMMARY:Formation of Merging Compact Binaries URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1509.htm END:VEVENT BEGIN:VEVENT UID:1807@kiaa.pku.edu.cn DTSTAMP:20231009T104301Z CREATED:20231009T104301Z DESCRIPTION:<p>The ground-based gravitational wave (GW) observatories discover a population of merging stellar binary black holes (BBHs), which are promising targets for multiband observations by the low-, middle-, and high-frequency GW detectors. We investigate the multiband GW detections of BBHs and demonstrate the advantages of such observations in improving the localization and parameter estimates of the ...</p> DTSTART;TZID=Asia/Shanghai:20231013T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231009T104301Z LOCATION: SUMMARY:Multiband gravitatioanl wave observations of stellar binary black holes URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1807.htm END:VEVENT BEGIN:VEVENT UID:1859@kiaa.pku.edu.cn DTSTAMP:20231016T144955Z CREATED:20231016T144955Z DESCRIPTION:<p>The concordance or standard Λ Cold Dark Matter (ΛCDM) model is a well-defined, predictive and simple cosmological model. A number of challenges of the standard ΛCDM model have been emerging during the past few years, which has been summarized by recent reviews.In this talk, I will give a brief introduction to several existing signals in cosmological and astrophysical data that appear to be i...</p> DTSTART;TZID=Asia/Shanghai:20231017T153000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231016T144955Z LOCATION: SUMMARY:existing tensions in ΛCDM model URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1859.htm END:VEVENT BEGIN:VEVENT UID:1508@kiaa.pku.edu.cn DTSTAMP:20230904T150439Z CREATED:20230904T150439Z DESCRIPTION:<p>Microquasars are the compact objects generally including accreting black holes which produce relativitic jets. The physical mechanisms of jet launching, collimation, and acceleration are poorly understood. Microquasars show strong variability in multi-wavelength observations. In X-rays, the sources show the fast variation features up to millisecond time scales, with the prominant quasiperiodic ...</p> DTSTART;TZID=Asia/Shanghai:20231019T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230904T150439Z LOCATION: SUMMARY:Radio observations of fast variations in microquasars URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1508.htm END:VEVENT BEGIN:VEVENT UID:1806@kiaa.pku.edu.cn DTSTAMP:20231018T145441Z CREATED:20231018T145441Z DESCRIPTION:<p>The accurate determination of stellar parameters in M-type stars holds significant importance in various astronomical studies. In our study, we employed a transfer learning method coupled with PHOENIX synthetic spectra to estimate fundamental atmospheric parameters (Teff, log g, [M/H], [α/M]) and radial velocities (RV) for an extensive dataset encompassing 581,778 M dwarfs obtained from the Lo...</p> DTSTART;TZID=Asia/Shanghai:20231020T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231018T145441Z LOCATION: SUMMARY:TRANSforM: stellar parameters estimated from LAMOST DR10 M dwarfs URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1806.htm END:VEVENT BEGIN:VEVENT UID:1685@kiaa.pku.edu.cn DTSTAMP:20231023T094023Z CREATED:20231023T094023Z DESCRIPTION:<p>Extended regions of accretion disks around supermassive black holes in bright AGNs are prone to gravitational instability, star formation and stellar dynamical evolution with feedback to the disks&#39; structure. Spectroscopic data provide vital clues on the stellar and residual black hole populations. Their dynamical interaction with each other, their natal disks, and other massive companions in a...</p> DTSTART;TZID=Asia/Shanghai:20231024T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231023T094023Z LOCATION: SUMMARY:An Overview of Stellar Evolution and Pollution in AGN Disk (SEPAD) and their Implication on the Stellar Dynamics in the Galactic Center and around other Supermassive Black Holes URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1685.htm END:VEVENT BEGIN:VEVENT UID:1858@kiaa.pku.edu.cn DTSTAMP:20231023T140357Z CREATED:20231023T140357Z DESCRIPTION:<p>Galaxy survey provides an important window for the exploration of fundamental physics by accurately mapping the large-scale structure of the Universe (LSS), which is expected to lead to great scientific discoveries. In cosmology, LSS encodes abundant key cosmological information (e.g., baryon acoustic oscillations, neutrino masses, primordial non-Gaussianities, gravity properties, and cosmologi...</p> DTSTART;TZID=Asia/Shanghai:20231024T153000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231023T140357Z LOCATION: SUMMARY:Optimization of Cosmological Information Extraction with Minkowski Functionals URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1858.htm END:VEVENT BEGIN:VEVENT UID:1499@kiaa.pku.edu.cn DTSTAMP:20231023T094544Z CREATED:20231023T094544Z DESCRIPTION:<p>Old low-metallicity (“metal-poor”) stars provide us a unique window to explore the early evolution and formation of our Milky Way as well as the early nucleosynthesis in the universe. In this talk, I would like to introduce the art of Galactic archaeology with metal-poor stars, mainly using the joint efforts between LAMOST and Subaru in the past few years as an example. A homogeneous high-pre...</p> DTSTART;TZID=Asia/Shanghai:20231026T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231023T094544Z LOCATION: SUMMARY:Exploring the early Milky Way with metal-poor stars URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1499.htm END:VEVENT BEGIN:VEVENT UID:1805@kiaa.pku.edu.cn DTSTAMP:20231023T141452Z CREATED:20231023T141452Z DESCRIPTION:<p>I present the latest results from a JWST Cycle 1 GO program, in which 12 of the lowest-luminosity z&gt;6 quasars selected from the deep Subaru/HSC survey are observed with NIRCam imaging and NIRSpec Fixed-Slit spectroscopy. We have successfully detected stellar light of quasar host galaxies in NIRCam F150W and F356W images, which straddle the redshifted 4000 angstrom break. A self-developed image ...</p> DTSTART;TZID=Asia/Shanghai:20231027T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231023T141452Z LOCATION: SUMMARY:First-year JWST results of high-redshift moderate-luminosity AGN URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1805.htm END:VEVENT BEGIN:VEVENT UID:1857@kiaa.pku.edu.cn DTSTAMP:20231030T170808Z CREATED:20231030T170808Z DESCRIPTION:<p>Clusters of galaxies trace the most non-linear peaks in the cosmic density field. The weak gravitational lensing of background galaxies by clusters can allow us to infer their masses. However, galaxies associated with the local environment of the cluster can also be intrinsically aligned due to the local tidal gradient, contaminating any cosmology derived from the lensing signal. In this talk, ...</p> DTSTART;TZID=Asia/Shanghai:20231030T100000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231030T170808Z LOCATION: SUMMARY:Cluster Intrinsic Alignment in DES Y1 URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1857.htm END:VEVENT BEGIN:VEVENT UID:1856@kiaa.pku.edu.cn DTSTAMP:20231030T171140Z CREATED:20231030T171140Z DESCRIPTION:<p>The eROSITA X-ray telescope has performed four X-ray all-sky surveys since its launch in July 2019. In this talk, I will briefly overview eROSITA&#39;s early results on galaxy clusters, with an emphasis on the eFEDS PV-phase program. I will also report the latest progress on clusters and superclusters from the first eROSITA All-Sky Survey.BIODr. Ang Liu is a postdoc researcher at Max Planck Institu...</p> DTSTART;TZID=Asia/Shanghai:20231031T153000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231030T171140Z LOCATION: SUMMARY:Surveying galaxy clusters in the X-ray Universe: New results from eROSITA URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1856.htm END:VEVENT BEGIN:VEVENT UID:1507@kiaa.pku.edu.cn DTSTAMP:20230904T155431Z CREATED:20230904T155431Z DESCRIPTION:<p>Supermassive black holes (SMBHs) spend most of their lifetime accreting at a rate well below the Eddington limit, manifesting themselves as low-luminosity active galactic nuclei (LLAGNs). The prevalence of a hot wind from LLAGNs is a generic prediction by theories and numerical simulations of black hole accretion and has recently become a crucial ingredient of AGN kinetic feedback in cosmologic...</p> DTSTART;TZID=Asia/Shanghai:20231102T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230904T155431Z LOCATION: SUMMARY:Feeding and Feedback of Low-luminosity AGNs URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1507.htm END:VEVENT BEGIN:VEVENT UID:1804@kiaa.pku.edu.cn DTSTAMP:20231031T112051Z CREATED:20231031T112051Z DESCRIPTION:<p>The Galactic disk contains a substantial fraction of the baryonic matter angular momentum and at least two main stellar populations. Therefore, the formation and evolution of the Galactic disk is essential for understanding how our Galaxy was formed and evolved. We used accurate photometric metallicity estimates and Gaia Early Data Release 3 astrometries and two independent techniques (velocity...</p> DTSTART;TZID=Asia/Shanghai:20231103T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231031T112051Z LOCATION: SUMMARY:Unprecedented insights into the formation and evolution of the Galactic disk. URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1804.htm END:VEVENT BEGIN:VEVENT UID:1506@kiaa.pku.edu.cn DTSTAMP:20230904T155700Z CREATED:20230904T155700Z DESCRIPTION:<p>Jupiter-like planets are the key to understanding Earth-like planets. Their presence can disrupt the orbits of inner habitable worlds, or deliver life-sustaining water. While the search for Earth-like planets orbiting nearby stars garners the most attention, it is critically important to understand the presence and properties of giant planets in those systems. In the next decade, three space mi...</p> DTSTART;TZID=Asia/Shanghai:20231109T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230904T155700Z LOCATION: SUMMARY:Like a wrecking ball: understanding giant planets as the key to finding Earths URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1506.htm END:VEVENT BEGIN:VEVENT UID:1683@kiaa.pku.edu.cn DTSTAMP:20231102T091553Z CREATED:20231102T091553Z DESCRIPTION:<p>The dynamical modelling technique is one of the major methods to measure the dark matter distribution in galaxies. Due to the degeneracy of baryonic and dark matter and the limitation of extended tracers in galaxies, accurate measurements of dark matter distribution in large sample of galaxies are still inadequate. We introduce our method to constrain the dark matter distribution in galaxies wi...</p> DTSTART;TZID=Asia/Shanghai:20231110T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231102T091553Z LOCATION: SUMMARY:Exploring galaxy dark matter with dynamical models using combined stellar and HI kinematics URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1683.htm END:VEVENT BEGIN:VEVENT UID:1803@kiaa.pku.edu.cn DTSTAMP:20231106T095614Z CREATED:20231106T095614Z DESCRIPTION:<p>Neutron stars and stellar-mass black holes are the remnants of massive star explosions. Most massive stars reside in close binary systems, but signatures for binarity or evidence &nbsp;for the formation of a compact object during a supernova explosion are still lacking. In this talk, I report the discovery of a stripped-envelope supernova, SN2022jli, which shows 12.4-day &nbsp;periodic undulations during...</p> DTSTART;TZID=Asia/Shanghai:20231110T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231106T095614Z LOCATION: SUMMARY:The binarity in massive star explosion -- A 12.4 day periodicity in a close binary system after a supernova URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1803.htm END:VEVENT BEGIN:VEVENT UID:1684@kiaa.pku.edu.cn DTSTAMP:20231031T205934Z CREATED:20231031T205934Z DESCRIPTION:<p>Star-forming galaxies are actively accreting gas from surrounding materials during the cosmic time, while the feedback from star formation on the other hand blows the gas away as well as enriches the inter-stellar/-galactic medium. The interplay between inflow, outflow and star formation is then the key to understand the formation and evolution of star-forming galaxies, as well as the relevant...</p> DTSTART;TZID=Asia/Shanghai:20231113T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231031T205934Z LOCATION: SUMMARY:Understanding the galaxy formation and metal-enrichment in the view of gas-regulator framework URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1684.htm END:VEVENT BEGIN:VEVENT UID:1854@kiaa.pku.edu.cn DTSTAMP:20231113T101716Z CREATED:20231113T101716Z DESCRIPTION:<p>The cosmic infrared background (CIB) is the accumulated infrared radiation mainly generated from dust emissions in star-forming galaxies. It bears rich information about star formation history, dust thermodynamics, and galaxy abundance in the distant Universe. The CIB auto- and cross-correlations with other large-scale structure (LSS) tracers have been used to probe the star formation, dust, an...</p> DTSTART;TZID=Asia/Shanghai:20231114T153000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231113T101716Z LOCATION: SUMMARY:The star formation, dust, and abundance of galaxies with CIB cross-correlations URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1854.htm END:VEVENT BEGIN:VEVENT UID:1505@kiaa.pku.edu.cn DTSTAMP:20230904T155854Z CREATED:20230904T155854Z DESCRIPTION:<p>Various 21 cm signals from neutral hydrogen have been proposed to probe the cosmic dawn, including the global 21 cm spectrum, the 21 cm tomography, and the 21 cm forest. They will provide valuable insights into the early structure formation during the cosmic dawn, and have been identified as the key scientific goals for a number of ground-based and space-borne radio experiments, including the i...</p> DTSTART;TZID=Asia/Shanghai:20231116T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230904T155854Z LOCATION: SUMMARY:Probing cosmic dawn from the ground to the lunar orbit URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1505.htm END:VEVENT BEGIN:VEVENT UID:1802@kiaa.pku.edu.cn DTSTAMP:20231110T145349Z CREATED:20231110T145349Z DESCRIPTION:<p>Lockman Hole field is an area in the sky with an extremely low column density of neutral hydrogen on the line of sight (Lockman et al., 1986). This outstanding characteristic turns Lockman Hole into a perfect window to observe extragalactic sources. The SRG/eROSITA space telescope conducted a deep X-ray survey in this area during the performance verification phase in 2019.My talk will be divide...</p> DTSTART;TZID=Asia/Shanghai:20231117T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231110T145349Z LOCATION: SUMMARY:SRG/eROSITA Lockman Hole Survey: X-ray Sources Classification and Obscured AGN Candidates URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1802.htm END:VEVENT BEGIN:VEVENT UID:1801@kiaa.pku.edu.cn DTSTAMP:20231110T145939Z CREATED:20231110T145939Z DESCRIPTION:<p>The highly ionized warm/hot intergalactic medium (WHIM) permeating the vast space of the cosmic filaments is one of the least explored baryon contents in the local Universe. The properties of the WHIM in long cosmic filaments with lengths reaching up to 20-100Mpc, which account for &gt;80% of the total filament volume and 50% of the baryonic mass, remain to be explored. In this work, we examine th...</p> DTSTART;TZID=Asia/Shanghai:20231117T124500 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231110T145939Z LOCATION: SUMMARY:Robust detection of the hot phase WHIM emission with eRASS URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1801.htm END:VEVENT BEGIN:VEVENT UID:1682@kiaa.pku.edu.cn DTSTAMP:20231109T102856Z CREATED:20231109T102856Z DESCRIPTION:<p>While high-contrast imaging surveys in the past decade have produced only a handful of self-luminous exoplanets, they opened new gates for studying the forming environments of planetary systems. With multi-epoch and multi-wavelength imaging, I will talk about our ongoing efforts on scientific expeditions using current flagship observatories. They include (1) pinpointing the orbits of hidden pla...</p> DTSTART;TZID=Asia/Shanghai:20231121T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231109T102856Z LOCATION: SUMMARY:High contrast imaging science with coronagraphic instruments URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1682.htm END:VEVENT BEGIN:VEVENT UID:1855@kiaa.pku.edu.cn DTSTAMP:20231110T152347Z CREATED:20231110T152347Z DESCRIPTION:<p>I will describe a model for galaxy formation and&nbsp;the growth of supermassive black holes (SMBHs), based on the fact that cold dark&nbsp;matter halos form their gravitational potential wells through a fast phase with rapid change&nbsp;in the potential, and that the high universal baryon fraction makes cooled gas in halos self-gravitating&nbsp;and turbulent before it can form rotation-supported disks. Gas fragme...</p> DTSTART;TZID=Asia/Shanghai:20231121T153000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231110T152347Z LOCATION: SUMMARY:A two-phase model of galaxy formation: the growth of galaxies and supermassive black holes URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1855.htm END:VEVENT BEGIN:VEVENT UID:1504@kiaa.pku.edu.cn DTSTAMP:20230904T160020Z CREATED:20230904T160020Z DESCRIPTION:<p>Who are we? Where do we come from?With the enhanced capabilities of modern radio and infrared telescopes, astrochemistry has experienced a remarkable surge in detecting molecules within the Interstellar Medium (ISM). Some of these identified species hold prebiotic significance. The origins, activation, and storage of these molecules within the ISM remain a mystery. How, when, and where these co...</p> DTSTART;TZID=Asia/Shanghai:20231123T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230904T160020Z LOCATION: SUMMARY:Astrochemistry: from the interstellar medium to the cradle of life URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1504.htm END:VEVENT BEGIN:VEVENT UID:1681@kiaa.pku.edu.cn DTSTAMP:20231120T115023Z CREATED:20231120T115023Z DESCRIPTION:<p>Tidal disruption events (TDEs) provide unique laboratories to&nbsp;study the demographics, immediate stellar and gaseous environments, and&nbsp;accretion physics of the massive black hole population. Over the past&nbsp;few years, time domain sky surveys such as the optical Zwicky Transient&nbsp;Facility (ZTF) have led to a surge of TDE discoveries in galaxy centers.&nbsp;This talk highlights our efforts to constrain th...</p> DTSTART;TZID=Asia/Shanghai:20231124T100000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231120T115023Z LOCATION: SUMMARY:Tidal Disruption Events: Probes of Accretion Physics and Black Hole Demographics URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1681.htm END:VEVENT BEGIN:VEVENT UID:1800@kiaa.pku.edu.cn DTSTAMP:20231123T091954Z CREATED:20231123T091954Z DESCRIPTION:<p>The third observing run of advanced LIGO, Virgo and KAGRA brought unprecedented sensitivity towards a variety of quasi-monochromatic, persistent gravitational-wave signals. Continuous waves allow us to probe not just the canonical asymmetrically rotating neutron stars, but also different forms of dark matter, thus showing the wide-ranging astrophysical implications of using a relatively simple ...</p> DTSTART;TZID=Asia/Shanghai:20231124T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231123T091954Z LOCATION: SUMMARY:Directly detecting dark matter and neutron stars with gravitational waves URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1800.htm END:VEVENT BEGIN:VEVENT UID:1680@kiaa.pku.edu.cn DTSTAMP:20231120T144052Z CREATED:20231120T144052Z DESCRIPTION:<p>We will discuss two promising dark matter scenarios: axion-like particle dark matter and primordial black hole dark matter. We begin with radio telescope probes on axion-like dark matter. We will discuss the axion-photon conversion around neutron stars which results in the radio emission and the 21 cm probes through the effects on large scale structure formation suppression. We then turn our at...</p> DTSTART;TZID=Asia/Shanghai:20231127T123000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231120T144052Z LOCATION: SUMMARY:Multi-Messenger Probes on Dark Matter Beyond WIMPs URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1680.htm END:VEVENT BEGIN:VEVENT UID:1503@kiaa.pku.edu.cn DTSTAMP:20230904T160119Z CREATED:20230904T160119Z DESCRIPTION:<p>Fast radio bursts (FRBs) are the brightest millisecond-duration-astronomical transients in radio bands with yet unknown origin. I will briefly review the development process of the field of fast radio bursts and introduce how we use FAST to study fast radio bursts. We reveal systematic frequency evolution of repeating FRBs, namely depolarization toward lower frequencies, which can be well descr...</p> DTSTART;TZID=Asia/Shanghai:20231130T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230904T160119Z LOCATION: SUMMARY:Exploring the blinking universe with FAST URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1503.htm END:VEVENT BEGIN:VEVENT UID:1799@kiaa.pku.edu.cn DTSTAMP:20231129T104303Z CREATED:20231129T104303Z DESCRIPTION:<p>UVCANDELS is a HST Cycle-26 Treasury Program awarded 164 orbits of primary ultraviolet (UV) F275W imaging and coordinated parallel optical F435W imaging in four CANDELS fields: GOODS-N, GOODS-S, EGS, and COSMOS, covering a total area of ～426 arcmin^2. This is ～2.7 times larger than the area covered by previous deep-field space UV data combined, reaching a depth of about 27 and 28 ABmag (5 \si...</p> DTSTART;TZID=Asia/Shanghai:20231201T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231129T104303Z LOCATION: SUMMARY:The UV luminosity function at 0.6 < z < 1 from UVCANDELS URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1799.htm END:VEVENT BEGIN:VEVENT UID:1852@kiaa.pku.edu.cn DTSTAMP:20231204T133656Z CREATED:20231204T133656Z DESCRIPTION:<p>Initial density distribution provides a basis for understanding the complete evolution of cosmological density fluctuations. While reconstruction in our local Universe exploits the observations of galaxy surveys with large volumes, observations of high-redshift galaxies are performed with a small field of view and therefore can hardly be used for reconstruction. Here we propose to reconstruct t...</p> DTSTART;TZID=Asia/Shanghai:20231205T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231204T133656Z LOCATION: SUMMARY:Reconstruction of Cosmological Initial Density Field with Observations from the Epoch of Reionization URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1852.htm END:VEVENT BEGIN:VEVENT UID:1502@kiaa.pku.edu.cn DTSTAMP:20230904T160303Z CREATED:20230904T160303Z DESCRIPTION:<p>The circumgalactic medium (CGM) contains the fuel for future star formation and the record of past feedback, making it uniquely sensitive to the physics of baryonic flows. Characterizing the tenuous multiphase CGM across cosmic time holds a key to unveiling the drivers of galaxy growth. The Cosmic Ultraviolet Baryon Survey (CUBS) is designed to map intergalactic and circumgalactic gas at interm...</p> DTSTART;TZID=Asia/Shanghai:20231207T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230904T160303Z LOCATION: SUMMARY:On the Cosmic Baryon Cycle---Insights Learned from the Cosmic Ultraviolet Baryon Survey (CUBS) URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1502.htm END:VEVENT BEGIN:VEVENT UID:1851@kiaa.pku.edu.cn DTSTAMP:20231211T105934Z CREATED:20231211T105934Z DESCRIPTION:<p>Understanding the composition and distribution of baryonic matter in the Universe is a crucial step toward unraveling the mysteries of its formation and evolution. Early estimates and numerical simulations show that most baryons are “missing,” whereas the baryons that are already made into stars and galaxies constitute a small portion of the total baryon budget. Therefore accurate constraints...</p> DTSTART;TZID=Asia/Shanghai:20231212T153000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231211T105934Z LOCATION: SUMMARY:Cross-correlation between the Thermal Sunyaev–Zeldovich Effect and the Integrated Sachs–Wolfe Effect URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1851.htm END:VEVENT BEGIN:VEVENT UID:1501@kiaa.pku.edu.cn DTSTAMP:20230904T161311Z CREATED:20230904T161311Z DESCRIPTION:<p>Pulsar wind nebulae and pulsar halos are extended sources of nonthermal radiation powered by pulsars. Morphologies of these sources reflect the spatial distribution of electrons/positrons therein, which is related to the particle transport mechanism and the turbulent nature of the background medium. Therefore, multiwavelength observations of pulsar wind nebula and pulsar halos provide a good op...</p> DTSTART;TZID=Asia/Shanghai:20231214T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230904T161311Z LOCATION: SUMMARY:Studying Particle Transport in the Magnetic Turbulence with Pulsar Wind Nebulae/Pulsar Halos with Multiwavelength Observations URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1501.htm END:VEVENT BEGIN:VEVENT UID:1798@kiaa.pku.edu.cn DTSTAMP:20231215T085522Z CREATED:20231215T085522Z DESCRIPTION:<p>Luminous red novae (LRNe) are relatively new transients that have the luminosity between classic novae and supernovae, initially classified as &quot;gap transients&quot;. Even though many more &quot;gap transients&quot; have been observed by telescopes such as ZTF and Keck, their origin and physical processes remain mysterious. To initiate the study of the nature of LRNe, I built a 1D and 2D radiation hydrodynamic...</p> DTSTART;TZID=Asia/Shanghai:20231215T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231215T085522Z LOCATION: SUMMARY:Bridging the gap between luminous red novae and common envelope evolution with radiation hydrodynamic models URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1798.htm END:VEVENT BEGIN:VEVENT UID:1678@kiaa.pku.edu.cn DTSTAMP:20231218T094427Z CREATED:20231218T094427Z DESCRIPTION:<p>Galaxies&#39; four-point correlation functions provide insights into parity symmetry at cosmological scales. In this talk, I will present our data analysis on the BOSS galaxy sample with a focus on various observational effects. I will also discuss some future aspects of extending the analysis, including models and connection with other observables. In addition, I will also discuss an alternative i...</p> DTSTART;TZID=Asia/Shanghai:20231218T100000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231218T094427Z LOCATION: SUMMARY:Probing Parity with Galaxy Distributions and Beyond URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1678.htm END:VEVENT BEGIN:VEVENT UID:1679@kiaa.pku.edu.cn DTSTAMP:20231212T095516Z CREATED:20231212T095516Z DESCRIPTION:<p>Highly magnetized neutron stars are a source of extreme transients observed in different bands, like the fast radio burst (FRB) and associated hard X-ray burst from the Galactic magnetar SGR 1935+2154. The origin of such outbursts, hard X-rays on the one hand and millisecond duration FRBs on the other hand, is still unknown. We present a global model for various kinds of such magnetar outbursti...</p> DTSTART;TZID=Asia/Shanghai:20231218T143000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231212T095516Z LOCATION: SUMMARY:Electromagnetic fireworks from erupting magnetars URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1679.htm END:VEVENT BEGIN:VEVENT UID:1850@kiaa.pku.edu.cn DTSTAMP:20231218T112715Z CREATED:20231218T112715Z DESCRIPTION:<p>The photoionization model of narrow-line regions (NLRs) in active galactic nuclei (AGNs) has been investigated for decades. Many published models are restricted to simple linear scaling abundance relations, dust-free assumption, uniform AGN radiation field, and using one specific photoionization code, which restricts them from providing a satisfactory prediction on a broad range of AGN observa...</p> DTSTART;TZID=Asia/Shanghai:20231219T153000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231218T112715Z LOCATION: SUMMARY:A New AGN Photoionization Model and Multi-wavelength Metallicity Diagnostics URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1850.htm END:VEVENT BEGIN:VEVENT UID:1500@kiaa.pku.edu.cn DTSTAMP:20230904T161428Z CREATED:20230904T161428Z DESCRIPTION:<p>Thousands of exoplanets have been discovered in the past ~30 years. However, there are still major gaps of knowledge in our understanding of planet formation. The most extreme exoplanets are often ideal for identifying, isolating, and investigating critical aspects of plant formation. In this talk, I will highlight three extremes of planet formation: 1) the ultra-short-period planets (&lt;1 day, &lt;...</p> DTSTART;TZID=Asia/Shanghai:20231221T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20230904T161428Z LOCATION: SUMMARY:Probing Planet Formation with the Most Extreme Cases URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1500.htm END:VEVENT BEGIN:VEVENT UID:1797@kiaa.pku.edu.cn DTSTAMP:20231220T104710Z CREATED:20231220T104710Z DESCRIPTION:<p>A significant fraction of super-Earths and sub-Neptunes are thought to experience an extreme loss of volatiles because of atmospheric evaporation in the early stages of their life. Though the mechanisms behind the extreme mass loss are not fully understood, two contenders have been widely discussed: photoevaporation from X-ray and ultraviolet irradiation and core powered mass loss. In this talk...</p> DTSTART;TZID=Asia/Shanghai:20231222T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231220T104710Z LOCATION: SUMMARY:The three regimes of atmospheric evaporation for super-Earths and sub-Neptunes URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1797.htm END:VEVENT BEGIN:VEVENT UID:1676@kiaa.pku.edu.cn DTSTAMP:20231225T091801Z CREATED:20231225T091801Z DESCRIPTION:<p>The frequency shifts measured in extragalactic Fast radio bursts (FRB)s probe the total column of ionized gas in the foreground, including large contributions from the CGM and IGM. By combining this information with both deep and wide &nbsp;spectroscopic observations of foreground galaxies, the information content is enhanced. The wide-field data &nbsp;(∼10s of Mpc scales) allows us to reconstruct the u...</p> DTSTART;TZID=Asia/Shanghai:20231225T110000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231225T091801Z LOCATION: SUMMARY:Constraining the Cosmic Partition of IGM and CGM Baryons with FRB Foreground Mapping URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1676.htm END:VEVENT BEGIN:VEVENT UID:1677@kiaa.pku.edu.cn DTSTAMP:20231220T095138Z CREATED:20231220T095138Z DESCRIPTION:<p>Data from the Gaia satellite are revolutionizing many fields of astronomy. I will present two related discoveries about white dwarfs: one is an extreme cooling anomaly upon phase transition of some white dwarfs, which stops their cooling for almost 10 Gyrs, and the other is the existence of merger products among single white dwarfs. I will show interesting solution to explain the anomaly and th...</p> DTSTART;TZID=Asia/Shanghai:20231225T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231220T095138Z LOCATION: SUMMARY:A cooling anomaly of white dwarfs URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1677.htm END:VEVENT BEGIN:VEVENT UID:1853@kiaa.pku.edu.cn DTSTAMP:20231204T113510Z CREATED:20231204T113510Z DESCRIPTION:<p>Previous studies of galaxy formation have shown that only 10 per cent of the cosmic baryons are in stars and galaxies, while 90 per cent of them are missing. In this talk, I will present several observational studies that coherently find significant evidences of the missing baryons. The first measurement is the cross-correlation between the thermal Sunyaev-Zeldovich effect with gravitational le...</p> DTSTART;TZID=Asia/Shanghai:20231226T153000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231204T113510Z LOCATION: SUMMARY:The “Missing baryons” in the cosmic web—what is it? Where is it? How much? URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1853.htm END:VEVENT BEGIN:VEVENT UID:1498@kiaa.pku.edu.cn DTSTAMP:20231226T113008Z CREATED:20231226T113008Z DESCRIPTION:<p>Making use of exponential increases in computing power, radio astronomers have been able to search larger areas of the sky at high time and frequency resolution. These surveys facilitate the studies of radio transients, particularly contributing to the thriving investigation of fast radio bursts (FRBs), enigmatic radio bursts observable at cosmological distances. I will provide an overview of t...</p> DTSTART;TZID=Asia/Shanghai:20231229T093000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231226T113008Z LOCATION: SUMMARY:The lively radio transient sky URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1498.htm END:VEVENT BEGIN:VEVENT UID:1796@kiaa.pku.edu.cn DTSTAMP:20231226T112600Z CREATED:20231226T112600Z DESCRIPTION:<p>The standard LCDM model seems to fail to reconcile the discrepancy of the H0 measurements between the early and late Universe. This H0 tension has become an increasingly mystery in the cosmology community. Moreover, the galaxy survey measurement of S8 value, namely the amplitude of matter density fluctuation, is smaller than the value inferred from CMB assuming LCDM, although with a less signif...</p> DTSTART;TZID=Asia/Shanghai:20231229T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231226T112600Z LOCATION: SUMMARY:Solutions towards the Hubble tension and S8 tension URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1796.htm END:VEVENT BEGIN:VEVENT UID:1849@kiaa.pku.edu.cn DTSTAMP:20240102T092957Z CREATED:20240102T092957Z DESCRIPTION:<p>As a prevalent and widely distributed component of galactic gas, neutral atomic hydrogen (HI) and Carbon lines (CO, CII) play a crucial role in comprehending various astrophysical processes, including star formation histories, galaxy interactions, and the tracing of cosmic large-scale structures. However, the sensitivity limitations of telescopes pose challenges to directly measuring line signa...</p> DTSTART;TZID=Asia/Shanghai:20240102T153000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240102T092957Z LOCATION: SUMMARY:Expanding our perspective to the distant universe through Intensity Mapping of HI and CII URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1849.htm END:VEVENT BEGIN:VEVENT UID:1795@kiaa.pku.edu.cn DTSTAMP:20240102T093241Z CREATED:20240102T093241Z DESCRIPTION:<p>The origin of the low-ionization nuclear emission-line region (LINER) prevalent in local galaxies and its relationship with supermassive black holes are debated for decades. We preform a comprehensive evaluation of traditional photoionization models against the circumnuclear ionized gas in M81, for which recent CAHA/PPAK integral-field spectroscopic observations reveal a LINER characteristic ou...</p> DTSTART;TZID=Asia/Shanghai:20240105T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240102T093241Z LOCATION: SUMMARY:The circumnuclear gas in M81: a unique testbed for AGN and stellar photoionization URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1795.htm END:VEVENT BEGIN:VEVENT UID:1496@kiaa.pku.edu.cn DTSTAMP:20231226T113734Z CREATED:20231226T113734Z DESCRIPTION:<p>In the galactic ecosystem, the circumgalactic medium (CGM) is a massive baryon reservoir orchestrating baryonic inflows and outflows, shaping galaxy formation and evolution. Of profound significance is the quenching of cosmic star formation since cosmic noon, pivotal in unraveling present-day galaxy characteristics, yet its driving force remains uncertain. Characterizing and modeling the CGM em...</p> DTSTART;TZID=Asia/Shanghai:20240109T093000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231226T113734Z LOCATION: SUMMARY:Deciphering Galaxy Quenching: Insights from the Multiphase Circumgalactic Medium URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1496.htm END:VEVENT BEGIN:VEVENT UID:1848@kiaa.pku.edu.cn DTSTAMP:20240108T153956Z CREATED:20240108T153956Z DESCRIPTION:<p>The advent of the James Webb Space Telescope (JWST) has brought the study of early galaxy formation to a new level. Shortly after it began its scientific operation, JWST revealed a large number of candidate galaxies at redshift (z) greater than 11 when the universe was less than ~420 million years old, some of which could even be at z ~ 20 (age of the universe ~180 million years). This was comp...</p> DTSTART;TZID=Asia/Shanghai:20240109T153000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240108T153956Z LOCATION: SUMMARY:Exploring the new high-redshift frontier with the James Webb Space Telescope URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1848.htm END:VEVENT BEGIN:VEVENT UID:1497@kiaa.pku.edu.cn DTSTAMP:20231226T113429Z CREATED:20231226T113429Z DESCRIPTION:<p>To date, there are more than 5000 exoplanets discovered in our neighborhood, showcasing a remarkable diversity in planetary system architectures. Unraveling the planet formation process, as well as the origin of this diversity, requires a comprehensive understanding of their birth sites - the dusty and gas-rich disks orbiting around young stars. ALMA’s unprecedented spatial resolution and sens...</p> DTSTART;TZID=Asia/Shanghai:20240111T093000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20231226T113429Z LOCATION: SUMMARY:Witnessing the Birth of Planets: The Structure and Chemistry of Planet-Forming Disks URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1497.htm END:VEVENT BEGIN:VEVENT UID:1794@kiaa.pku.edu.cn DTSTAMP:20240108T154331Z CREATED:20240108T154331Z DESCRIPTION:<p>In the past two decades, systematic studies have revealed hundreds of ultra-compact dwarf galaxies (UCDs) in the nearby Universe. While similar in appearance to massive globular clusters, the detection of extended stellar envelopes, complex star formation histories, elevated mass-to-light ratio, and supermassive black holes suggest that some UCDs are remnant nuclear star clusters of tidally-str...</p> DTSTART;TZID=Asia/Shanghai:20240112T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240108T154331Z LOCATION: SUMMARY:Ultra-compact dwarf galaxies caught in the act of transformation URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1794.htm END:VEVENT BEGIN:VEVENT UID:1675@kiaa.pku.edu.cn DTSTAMP:20240226T135931Z CREATED:20240226T135931Z DESCRIPTION:<p>Weak gravitational lensing imprints a coherent distortion onto the observed shapes of distant galaxies. At the image level, this gravitational shear degenerates with the intrinsic shape of galaxies, and the weak lensing signal-to-noise from an individual galaxy is of order 0.01. I will describe Kinematic Lensing, a new technique combining imaging and galaxy kinematics to measure weak lensing wi...</p> DTSTART;TZID=Asia/Shanghai:20240228T160000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240226T135931Z LOCATION: SUMMARY:Weak Lensing Without Shape Noise URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1675.htm END:VEVENT BEGIN:VEVENT UID:1847@kiaa.pku.edu.cn DTSTAMP:20240304T135419Z CREATED:20240304T135419Z DESCRIPTION:<p>Dwarf galaxies provide rich constraints on galaxy formation, reionization, and the nature of dark matter. However, flexible models of their star formation histories in a cosmological context are lacking. We introduce a novel framework for connecting dwarf galaxy dark matter assemblies and star formation histories based on the empirical model UniverseMachine (UM). Our framework is flexible, such...</p> DTSTART;TZID=Asia/Shanghai:20240305T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240304T135419Z LOCATION: SUMMARY:Towards a Unified Model of Dwarf Galaxy Star Formation and Halo Connection with UniverseMachine URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1847.htm END:VEVENT BEGIN:VEVENT UID:1495@kiaa.pku.edu.cn DTSTAMP:20240223T142913Z CREATED:20240223T142913Z DESCRIPTION:<p>In our modern understanding of the Universe, dark matter (DM) constitutes ~85% of the total mass and forms gravitationally bound halos which are the sites for galaxy formation. Galaxies contain information of their host halos, and halos react to the baryonic processes of the inhabitant galaxies — their connections are essential for understanding galaxy formation, and enable us to derive fundam...</p> DTSTART;TZID=Asia/Shanghai:20240307T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240223T142913Z LOCATION: SUMMARY:Galaxy-halo connection and near-field cosmology with numerical and semi-analytic methods URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1495.htm END:VEVENT BEGIN:VEVENT UID:1793@kiaa.pku.edu.cn DTSTAMP:20240304T103835Z CREATED:20240304T103835Z DESCRIPTION:<p>The early evolution of the black hole mass function (BHMF) and quasar luminosity function (QLF) encodes key information on the physics determining the radiative and accretion processes of black holes (BHs) growing in high-redshift galaxies. Starting from the formation of seed BHs as their parent halos evolve, we study primordial gas collapse in the biased quasar host halos, computing gas chemic...</p> DTSTART;TZID=Asia/Shanghai:20240308T123000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240304T103835Z LOCATION: SUMMARY:Pathway to high-z SMBHs: seed formation and growth in the statistical perspective URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1793.htm END:VEVENT BEGIN:VEVENT UID:1846@kiaa.pku.edu.cn DTSTAMP:20240308T154124Z CREATED:20240308T154124Z DESCRIPTION:<p>The bar of the Galaxy is believed to slow down. We use an axisymmetric background potential plus a central bar model to perform the test particle simulations in order to investigate the possible origin of the phase space spirals and the thin-disc-like low-metallicity stars (VMPs). The Gaia data reveal a two-armed phase spiral pattern in the local &nbsp;plane inside the solar radius. On the contrary,...</p> DTSTART;TZID=Asia/Shanghai:20240312T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240308T154124Z LOCATION: SUMMARY:A decelerating bar in the Galaxy URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1846.htm END:VEVENT BEGIN:VEVENT UID:1494@kiaa.pku.edu.cn DTSTAMP:20240223T143355Z CREATED:20240223T143355Z DESCRIPTION:<p>The escape of the atmosphere plays a crucial role in planetary evolution. Recent advancements in high spectral resolution transmission spectrum observation have provided an exceptional opportunity to investigate the structure of exoplanet upper atmospheres and their escape processes. In this talk, I will introduce a sophisticated forward model by expanding the capability of a one-dimensional mo...</p> DTSTART;TZID=Asia/Shanghai:20240314T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240223T143355Z LOCATION: SUMMARY:A hydrodynamic study of the atmospheric escape of the hot Jupiter WASP-121b URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1494.htm END:VEVENT BEGIN:VEVENT UID:1792@kiaa.pku.edu.cn DTSTAMP:20240307T105104Z CREATED:20240307T105104Z DESCRIPTION:<p>The Merian survey is an ongoing medium-band imaging survey on the CTIO 4-meter Blanco telescope. With two new medium-band filters on DECam, we expect to detect ~100,000 star-forming dwarf galaxies at z~0.1 in the HSC-SSP wide field (~800 deg^2), aiming to characterize dark matter halo and stellar feedback in dwarf galaxies. The Merian survey will allow us to measure the full dark matter profile...</p> DTSTART;TZID=Asia/Shanghai:20240315T123000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240307T105104Z LOCATION: SUMMARY:The Merian Survey: Characterizing dark matter and feedback in star-forming dwarf galaxies with medium-band filters on DECam URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1792.htm END:VEVENT BEGIN:VEVENT UID:1845@kiaa.pku.edu.cn DTSTAMP:20240315T143536Z CREATED:20240315T143536Z DESCRIPTION:<p>The Cosmological Principle (CP) was a major achievement of modern cosmology to turn qualitative statements into quantitative ones. It makes the strong assumption that space is globally homogeneous and isotropic. By doing so, it reduces Einstein’s Field Equations to provide highly symmetric cosmological models. The latter then enable us to interpret a very sparse amount of data and put them int...</p> DTSTART;TZID=Asia/Shanghai:20240319T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240315T143536Z LOCATION: SUMMARY:Can we test cosmic homogeneity and isotropy? URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1845.htm END:VEVENT BEGIN:VEVENT UID:1674@kiaa.pku.edu.cn DTSTAMP:20240318T094358Z CREATED:20240318T094358Z DESCRIPTION:<p>Completing the census of active galactic nuclei (AGN) activity is the key to study the build-up of supermassive black holes (SMBHs) and understand their relations with the host galaxy properties. Nevertheless, many AGNs are obscured by dust and gas, making the identification of such systems a challenging task even today. In this talk, I will present the first results on the AGN identifications ...</p> DTSTART;TZID=Asia/Shanghai:20240320T100000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240318T094358Z LOCATION: SUMMARY:AGN selection and demographics: a new age with JWST/MIRI URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1674.htm END:VEVENT BEGIN:VEVENT UID:1493@kiaa.pku.edu.cn DTSTAMP:20240223T143526Z CREATED:20240223T143526Z DESCRIPTION:<p>Our Universe is pervaded with X-ray sources. When X-ray photons traverse through interstellar space, they can be scattered by dust particles floating in space, producing scattering rings and halos around X-ray sources. This scattering effect can be used to study the distribution of interstellar dust, as well as the size distribution, composition and structure of dust grains. It also affects the...</p> DTSTART;TZID=Asia/Shanghai:20240321T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240223T143526Z LOCATION: SUMMARY:Interstellar X-ray Dust Scattering: Current Research and Future Prospects URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1493.htm END:VEVENT BEGIN:VEVENT UID:1791@kiaa.pku.edu.cn DTSTAMP:20240313T150217Z CREATED:20240313T150217Z DESCRIPTION:<p>The 4-m Multi-Object Spectroscopic Telescope (4MOST) is one of the ESO community survey with a large field-of-view to survey the southern sky in a few years, delivering spectra for ≥25 million objects over ≥15 000 square degrees in R~6000 and R~20000. 4MOST is currently in its manufacturing, assembly, integration and test phase with an expected start of full science operations within a year. ...</p> DTSTART;TZID=Asia/Shanghai:20240322T123000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240313T150217Z LOCATION: SUMMARY:4MOST Galactic pipeline: radial velocity and pysme stellar parameters URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1791.htm END:VEVENT BEGIN:VEVENT UID:1844@kiaa.pku.edu.cn DTSTAMP:20240325T105924Z CREATED:20240325T105924Z DESCRIPTION:<p>The simplest single-field inflation models predict a nearly Gaussian distribution of primordial density perturbations. However, the non-Gaussianity of the primordial density field serves as a powerful probe into the physics of the early universe, especially when considering more complex inflation models. The Cosmic Microwave Background (CMB) bispectrum has provided the tightest constraint on th...</p> DTSTART;TZID=Asia/Shanghai:20240326T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240325T105924Z LOCATION: SUMMARY:Primordial non-Gaussianity (PNG) and Its Detection by Cosmolgical Surveys URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1844.htm END:VEVENT BEGIN:VEVENT UID:1492@kiaa.pku.edu.cn DTSTAMP:20240223T143654Z CREATED:20240223T143654Z DESCRIPTION:<p>Pulsar wind nebulae (PWNe) are powerful sources of non-thermal X-ray radiation, which is intrinsically polarized due to synchrotron emission. The magnetic field strength and structure in these sources play a crucial role in shaping their dynamics, energetics and evolution, as well as in accelerating particles to very high energies. X-ray polarimetry can provide unique insights into understandin...</p> DTSTART;TZID=Asia/Shanghai:20240328T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240223T143654Z LOCATION: SUMMARY:A polarized view of the pulsar wind nebulae with IXPE URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1492.htm END:VEVENT BEGIN:VEVENT UID:1673@kiaa.pku.edu.cn DTSTAMP:20240325T105118Z CREATED:20240325T105118Z DESCRIPTION:<p>Dust plays an important&nbsp;role in planet formation as they grow from micron sized grains to over Mm sized planets. The intermediate stage, to form km-sized planetesimals from mm-cm sized dust particles, has been found to be difficult. These mm-cm sized dust particles frequently distribute in ring-like structures in protoplanetary disks as revealed in ALMA observations. Here, I present a series of...</p> DTSTART;TZID=Asia/Shanghai:20240329T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240325T105118Z LOCATION: SUMMARY:Dust Dynamics in Planet Formation Processes & Towards Multi-stage Studies URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1673.htm END:VEVENT BEGIN:VEVENT UID:1790@kiaa.pku.edu.cn DTSTAMP:20240325T110229Z CREATED:20240325T110229Z DESCRIPTION:<p>Kinematic studies of protoplanetary discs are becoming a valuable method for uncovering hidden companions. While there exists a substantial amount of literature on the understanding of planet-disc interactions and their observational implications, little attention has been made towards circumbinary discs. Using 3D hydrodynamical simulations post-processed with Monte Carlo radiative transfer, I ...</p> DTSTART;TZID=Asia/Shanghai:20240329T123000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240325T110229Z LOCATION: SUMMARY:Kinematic Signatures of Circumbinary Discs: Spiral arms, Fast Flows, and Doppler Flips URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1790.htm END:VEVENT BEGIN:VEVENT UID:1843@kiaa.pku.edu.cn DTSTAMP:20240401T102746Z CREATED:20240401T102746Z DESCRIPTION:<p>We utilize the public Gizmo code to simulate twelve galaxies from the NIHAO suite simulated with the ESF-Gasoline2 code, then compare the corresponding galaxies in the two simulations. We find that while both codes with the same initial conditions and large-scale environments can successfully produce similar disc galaxies, significant differences are still seen in many properties of the galaxie...</p> DTSTART;TZID=Asia/Shanghai:20240402T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240401T102746Z LOCATION: SUMMARY:Baryon Recycle in Disc Galaxy URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1843.htm END:VEVENT BEGIN:VEVENT UID:1491@kiaa.pku.edu.cn DTSTAMP:20240223T143952Z CREATED:20240223T143952Z DESCRIPTION:<p>Massive stars have a significant impact on the dynamical evolution of star clusters. They play a crucial role during star formation, as their radiation can push surrounding gas away and inhibit further star formation. Additionally, strong mass loss from massive stars via strong winds can rapidly reduce the gravitational potential of star clusters and trigger their fast expansion. Once these mas...</p> DTSTART;TZID=Asia/Shanghai:20240411T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240223T143952Z LOCATION: SUMMARY:The impact of massive stars and black holes on the dynamical evolution of star clusters URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1491.htm END:VEVENT BEGIN:VEVENT UID:1789@kiaa.pku.edu.cn DTSTAMP:20240407T161213Z CREATED:20240407T161213Z DESCRIPTION:<p>The advent of integral field data has revolutionised the study of galaxy evolution. A key component of this is dynamical modelling methods which have allowed for crucial insights to be made from kinematic data. Despite this importance, most dynamical models make a number of key assumptions which do not hold for real galaxies. At the same time, machine learning methods are becoming increasingly ...</p> DTSTART;TZID=Asia/Shanghai:20240412T123000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240407T161213Z LOCATION: SUMMARY:Dynamical Modelling of Galactic Kinematics using Neural Networks URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1789.htm END:VEVENT BEGIN:VEVENT UID:1672@kiaa.pku.edu.cn DTSTAMP:20240415T093058Z CREATED:20240415T093058Z DESCRIPTION:<p>I will present the maps of the large scale structure at soft X-ray wavelength obtained by eROSITA. I will discuss how the observed emission unravels the properties of the circum-galactic medium of our Milky-Way and nearby galaxies.Then I discuss what astrophysical and cosmological information is contained in the map subtended by X-ray detected clusters and Active galactic nuclei</p> DTSTART;TZID=Asia/Shanghai:20240415T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240415T093058Z LOCATION: SUMMARY:X-ray emissions from the large scale structure of the Universe with an eROSITA focus URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1672.htm END:VEVENT BEGIN:VEVENT UID:1671@kiaa.pku.edu.cn DTSTAMP:20240415T093248Z CREATED:20240415T093248Z DESCRIPTION:<p>The 4MOST consortium has been selected by the European Southern Observatory (ESO) to provide the ESO community with a fibre-fed spectroscopic survey facility on the VISTA telescope with a large enough field-of-view to survey a large frac­tion of the southern sky in a few years. The facility will be able to simultaneously obtain spectra of ~2400 objects distributed over an hexagonal field-of-vie...</p> DTSTART;TZID=Asia/Shanghai:20240416T100000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240415T093248Z LOCATION: SUMMARY:The 4MOST instrument and upcoming spectroscopic surveys URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1671.htm END:VEVENT BEGIN:VEVENT UID:1842@kiaa.pku.edu.cn DTSTAMP:20240415T094959Z CREATED:20240415T094959Z DESCRIPTION:<p>TBC</p> DTSTART;TZID=Asia/Shanghai:20240416T153000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240415T094959Z LOCATION: SUMMARY:Modelling sub-millimetre emission from the cold circumgalactic medium around high redshift galaxies URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1842.htm END:VEVENT BEGIN:VEVENT UID:1490@kiaa.pku.edu.cn DTSTAMP:20240223T144308Z CREATED:20240223T144308Z DESCRIPTION:<p>Our standard cosmological model predicts that most of the matter in the universe is distributed into a network of filaments - the Cosmic Web - in which galaxies form and evolve. Because most of this material is too diffuse to form stars, its direct detection in emission has remained elusive for several decades leaving fundamental questions still open, including: How are galaxies linked to each ...</p> DTSTART;TZID=Asia/Shanghai:20240418T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240223T144308Z LOCATION: SUMMARY:Illuminating the Cosmic Web and the Circumgalactic Medium with the help of quasars URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1490.htm END:VEVENT BEGIN:VEVENT UID:1788@kiaa.pku.edu.cn DTSTAMP:20240409T155901Z CREATED:20240409T155901Z DESCRIPTION:<p>Estimating the spin of SgrA∗ is one of the current challenges we face in understanding the center of our Galaxy. In the present work, we show that detecting the gravitational waves (GWs) emitted by a brown dwarf inspiraling around SgrA∗ will allow us to measure the mass and the spin of SgrA∗ with unprecedented accuracy. Such systems are known as extremely large mass-ratio inspirals (XMRIs) a...</p> DTSTART;TZID=Asia/Shanghai:20240419T123000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240409T155901Z LOCATION: SUMMARY:SgrA∗ spin and mass estimates through the detection of an extremely large mass-ratio inspiral URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1788.htm END:VEVENT BEGIN:VEVENT UID:1841@kiaa.pku.edu.cn DTSTAMP:20240422T094902Z CREATED:20240422T094902Z DESCRIPTION:<p>Observations indicate that massive elliptical galaxies in the contemporary universe exhibit both low star formation rates and low AGN luminosity. This raises a question: Given continuous gas accretion, how do these massive ellipticals maintain their quiescent state? SMBH feedback is a widely accepted solution to this issue, yet the mechanisms how it prevents gas accretion and subsequent star fo...</p> DTSTART;TZID=Asia/Shanghai:20240423T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240422T094902Z LOCATION: SUMMARY:Gas Accretion and AGN Feedback in the Late Stage Evolution of Massive Ellipticals URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1841.htm END:VEVENT BEGIN:VEVENT UID:1670@kiaa.pku.edu.cn DTSTAMP:20240417T150020Z CREATED:20240417T150020Z DESCRIPTION:<p>Galaxies are complex systems influenced by numerous factors. Despite extensive research, we cannot yet explain the diverse properties of nearby galaxies. Gas accretion, environments, galaxy merging, and supermassive black hole (SMBH) feedback play pivotal roles in galaxy evolution. In this talk, I will present an overview of my recent and current research. My work entails a comprehensive compar...</p> DTSTART;TZID=Asia/Shanghai:20240424T150000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240417T150020Z LOCATION: SUMMARY:Evolutionary Mechanisms in nearby galaxies: Insights from Statistical Analysis of Observations and Cosmological Simulations URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1670.htm END:VEVENT BEGIN:VEVENT UID:1489@kiaa.pku.edu.cn DTSTAMP:20240223T145206Z CREATED:20240223T145206Z DESCRIPTION:<p>The migration of planets, through the exchange of angular momentum with the protoplanetary discs in which they form, is likely to be important during planet formation. Evidence for migration is provided by systems of multiple exoplanets in which the planets are in mean motion resonances, and by the orbital configurations of circumbinary planets. However, attempts to reproduce the known populati...</p> DTSTART;TZID=Asia/Shanghai:20240425T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240223T145206Z LOCATION: SUMMARY:Recent developments in the theory of planet migration URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1489.htm END:VEVENT BEGIN:VEVENT UID:1787@kiaa.pku.edu.cn DTSTAMP:20240422T095454Z CREATED:20240422T095454Z DESCRIPTION:<p>With the advent of massive large-scale sky surveys, such as, the SDSS for photometry, the LAMOST for spectroscopy, and Gaia for astrometry, we are entering a golden era of Galactic studies and precise multi-dimensional information (e.g., 3D position, 3D velocity, chemical element abundance ratios, and stellar age) is now available for some huge samples of stars in the Milky Way. Leveraging thes...</p> DTSTART;TZID=Asia/Shanghai:20240426T123000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240422T095454Z LOCATION: SUMMARY:Research on the Structure, Chemistry and Kinematics of the Milky Way Based on the Large-scale Sky Surveys URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1787.htm END:VEVENT BEGIN:VEVENT UID:1840@kiaa.pku.edu.cn DTSTAMP:20240506T094836Z CREATED:20240506T094836Z DESCRIPTION:<p>Dark matter halos are the major composition of the cosmic structures in our Universe and, therefore, play a central role in studying galaxies and cosmology. In cosmological N-body simulations, dark matter halos can be investigated from three perspectives: their structures, assembly histories, and spatial clustering. This talk will focus on our recent work on this topic. In the first part, I wil...</p> DTSTART;TZID=Asia/Shanghai:20240508T153000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240506T094836Z LOCATION: SUMMARY:Dark Matter Halo and its Structure, Assembly, and Clustering URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1840.htm END:VEVENT BEGIN:VEVENT UID:1488@kiaa.pku.edu.cn DTSTAMP:20240223T145340Z CREATED:20240223T145340Z DESCRIPTION:<p>Red supergiants &nbsp;are important contributors to interstellar medium through massive wind. Due to serious interstellar extinction, the complete sample of RSGs is extremely difficult to obtain in our Galaxy. As &nbsp;two of the largest spiral galaxies in the Local Group, M31 and M33 can serve as a reference to analyze the global contribution of RSGs to the galactic medium. By using evident branching of...</p> DTSTART;TZID=Asia/Shanghai:20240509T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240223T145340Z LOCATION: SUMMARY:The sample and mass loss rate of red supergiants in M31 and M33 URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1488.htm END:VEVENT BEGIN:VEVENT UID:1786@kiaa.pku.edu.cn DTSTAMP:20240506T101033Z CREATED:20240506T101033Z DESCRIPTION:<p>Observations of high-redshift galaxies with unprecedented detail have now been rendered possible with JWST. However, accurately quantifying their morphology remains uncertain due to potential biases and uncertainties. To address this issue, I used a sample of 1816 nearby DESI galaxies to compute artificial images of galaxies of the same mass located at high redshifts and observed at rest-frame ...</p> DTSTART;TZID=Asia/Shanghai:20240510T123000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240506T101033Z LOCATION: SUMMARY:Biases and uncertainties in quantifying morphology of galaxies at high redshifts with JWST URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1786.htm END:VEVENT BEGIN:VEVENT UID:1749@kiaa.pku.edu.cn DTSTAMP:20240506T095057Z CREATED:20240506T095057Z DESCRIPTION:<p>By analytically solving the Teukolsky gravitational&nbsp;wave equation for the spacetime of an ultracompact star of constant density, we derive exact and simple formulae that completely describe&nbsp;weakly damped oscillations trapped inside such stars. No similar&nbsp;complete analytic solution was known before, despite several attempts&nbsp;to find it. Our solution is cast in terms of the quasi normal modes&nbsp;of o...</p> DTSTART;TZID=Asia/Shanghai:20240514T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240506T095057Z LOCATION: SUMMARY:Gravitational radiation from oscillations of ultracompact stars URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1071/1749.htm END:VEVENT BEGIN:VEVENT UID:1487@kiaa.pku.edu.cn DTSTAMP:20240223T150257Z CREATED:20240223T150257Z DESCRIPTION:<p>Magnetic reconnection is a fundamental physical process in various astrophysical, space, and laboratory environments. In solar physics, it is even believed to be a key mechanism to heat/accelerate plasmas and drive the eruption of large-scale magnetic field, giving rise to coronal mass ejections and flares, as well as solar energetic particles. High-cadence and high-resolution observations rece...</p> DTSTART;TZID=Asia/Shanghai:20240516T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240223T150257Z LOCATION: SUMMARY:Observations and 3D MHD simulations of magnetic reconnection URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1487.htm END:VEVENT BEGIN:VEVENT UID:1785@kiaa.pku.edu.cn DTSTAMP:20240513T103535Z CREATED:20240513T103535Z DESCRIPTION:<p>Over the past few years, the computing capability of portable devices equipped with ARM processors has expanded exponentially. Yet, despite their growing power, the prevalent Android-like operating systems often confine users to a &#39;walled garden,&#39; restricting direct interaction with the core Linux functionalities. In this presentation, we will explore the transformative potential of Termux and ...</p> DTSTART;TZID=Asia/Shanghai:20240517T123000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240513T103535Z LOCATION: SUMMARY:Portable Fantacies: How to Work with Android-like Devices URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1785.htm END:VEVENT BEGIN:VEVENT UID:1839@kiaa.pku.edu.cn DTSTAMP:20240520T095901Z CREATED:20240520T095901Z DESCRIPTION:<p>The life cycle of a star cluster can be broken into three epochs: 1) the birth of the cluster; 2) the long phase when the cluster evolves in gravitational equilibrium, gradually losing stars; and 3) the death of the cluster when it dissolves into a stream of stars. The clusters in the first epoch directly record the initial properties inherited from the host galaxy. The evolved clusters during ...</p> DTSTART;TZID=Asia/Shanghai:20240521T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240520T095901Z LOCATION: SUMMARY:Galaxy Assembly Revealed by the Life Cycle of Star Clusters URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1839.htm END:VEVENT BEGIN:VEVENT UID:1666@kiaa.pku.edu.cn DTSTAMP:20240517T162348Z CREATED:20240517T162348Z DESCRIPTION:<p>Most galaxies comparable to or larger than the mass of the Milky Way host hot, X-ray emitting atmospheres and accreting supermassive black holes. &nbsp;Hot atmospheres and radio jets and lobes are the ingredients of radio-mechanical active galactic nucleus (AGN) feedback. At least half of the most massive early-type galaxies harbour multi-phase filamentary gas, which appears to result from the therm...</p> DTSTART;TZID=Asia/Shanghai:20240523T100000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240517T162348Z LOCATION: SUMMARY:Accreting massive black holes and a Czech UV space telescope URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1666.htm END:VEVENT BEGIN:VEVENT UID:1486@kiaa.pku.edu.cn DTSTAMP:20240223T150422Z CREATED:20240223T150422Z DESCRIPTION:<p>I will introduce some of our recent work focused on the measurement and modeling of galaxy distribution. We have developed a new method called PAC to make use of the complementary information from redshift and photometric galaxy surveys. With this method, we are able to significantly improve the measurements of some important observational quantities such as the galaxy stellar mass function and...</p> DTSTART;TZID=Asia/Shanghai:20240523T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240223T150422Z LOCATION: SUMMARY:Precision studies of galaxy formation and cosmology URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1486.htm END:VEVENT BEGIN:VEVENT UID:1667@kiaa.pku.edu.cn DTSTAMP:20240516T101226Z CREATED:20240516T101226Z DESCRIPTION:<p>The utilization of Pulse Profile modeling techniques could simultaneously provide measurements for Neutron star Mass Radius and offer insights into their hotspot distribution. Presently, these methodologies rely on meta models of the equation of state (EOS) and employ pure geometrical cap overlapping techniques to align with observational data. This presentation aims to showcase our recent resu...</p> DTSTART;TZID=Asia/Shanghai:20240524T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240516T101226Z LOCATION: SUMMARY:Cracking neutron star mysteries: Physics-driven insights into interior, surface, and exterior by X-ray Timing results URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1667.htm END:VEVENT BEGIN:VEVENT UID:1784@kiaa.pku.edu.cn DTSTAMP:20240520T100409Z CREATED:20240520T100409Z DESCRIPTION:<p>I will present new state-of-the art observations of the Perseus Cluster taken as part of the Euclid Early Release Observations. &nbsp;This data allows us, for the first time, to characterize the intracluster light (ICL) and intracluster globular clusters (ICGCs) in Perseus out to 600 kpc from the BCG. &nbsp;We find that within 500kpc of the BCG, there are 70,000 globular clusters and that the ICL account...</p> DTSTART;TZID=Asia/Shanghai:20240524T123000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240520T100409Z LOCATION: SUMMARY:A Euclid View of the Intracluster Light in the Perseus Cluster URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1784.htm END:VEVENT BEGIN:VEVENT UID:1838@kiaa.pku.edu.cn DTSTAMP:20240527T080229Z CREATED:20240527T080229Z DESCRIPTION:<p>The Planck mission measures the cosmic microwave background (CMB) with unprecedentedly precision. The angular spectra extracted from Planck&#39;s CMB measurements can be used to test gravitational theories and cosmological models. This is done by comparing the observational results with theoretical predictions that can be calculated by solving together the Boltzmann equation governing the evolution...</p> DTSTART;TZID=Asia/Shanghai:20240528T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240527T080229Z LOCATION: SUMMARY:Mathematica code for calculating CMB anisotropy URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1838.htm END:VEVENT BEGIN:VEVENT UID:1748@kiaa.pku.edu.cn DTSTAMP:20240517T154107Z CREATED:20240517T154107Z DESCRIPTION:<p>The dust content of protoplanetary disks plays a crucial role in the planet formation process. The key ingredients are not only the total budget of solid mass and the dust particle size distribution, but also how these are distributed throughout the protoplanetary disk. Characterizing the dust surface density, particle properties, and size distribution within the disk and its substructures is, ...</p> DTSTART;TZID=Asia/Shanghai:20240529T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240517T154107Z LOCATION: SUMMARY:A closer look at the building blocks of planetesimals: characterizing the dust content of protoplanetary disks URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1071/1748.htm END:VEVENT BEGIN:VEVENT UID:1485@kiaa.pku.edu.cn DTSTAMP:20240223T150604Z CREATED:20240223T150604Z DESCRIPTION:<p>30 years after the ROSAT all-sky survey (1990), eROSITA performed X-ray all-sky surveys again in 2020-2022, in which 90% of the sky was observed in the X-ray band with high resolution for the first time. The eROSITA all-sky surveys (eRASSs) will detect millions of AGNs and tens of thousands of galaxy clusters and open a large space of discoveries. I will introduce eRASS and three research topic...</p> DTSTART;TZID=Asia/Shanghai:20240530T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240223T150604Z LOCATION: SUMMARY:New windows in X-ray astronomy opened by eROSITA all-sky surveys URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1485.htm END:VEVENT BEGIN:VEVENT UID:1783@kiaa.pku.edu.cn DTSTAMP:20240524T095408Z CREATED:20240524T095408Z DESCRIPTION:<p>Satellite systems around Jupiter and Saturn have different characteristics. The Saturnian system is dominated by a giant moon, Titan, which holds over 95% of the total mass of Saturnian moons. On the other hand, the Jovian system has four large moons in a compact orbital area, and inner three, Io, Europa and Ganymede, are known to be in resonant orbits. Previous studies have shown that the spec...</p> DTSTART;TZID=Asia/Shanghai:20240531T123000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240524T095408Z LOCATION: SUMMARY:Formation of satellite systems around Jupiter and Saturn URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1783.htm END:VEVENT BEGIN:VEVENT UID:1669@kiaa.pku.edu.cn DTSTAMP:20240515T142612Z CREATED:20240515T142612Z DESCRIPTION:<p>Short-period super-Earths and sub-Neptunes are the most abundant type of planets. Their origin is key to understanding planet formation and the evolution of protoplanetary disks. Recent observations found that, contrary to mature systems, young planetary systems appear to be dominated by near-resonant configurations, suggesting a rich history of resonance capture followed by secular dynamical i...</p> DTSTART;TZID=Asia/Shanghai:20240603T110000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240515T142612Z LOCATION: SUMMARY:Planet Formation near the Inner Disk Edge URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1669.htm END:VEVENT BEGIN:VEVENT UID:1837@kiaa.pku.edu.cn DTSTAMP:20240603T093254Z CREATED:20240603T093254Z DESCRIPTION:<p>Investigating spatially resolved properties of galaxies offers important constraints on the mechanisms by which galaxies form stars and grow in stellar mass. The James Webb Space Telescope (JWST) not only facilitates a systematic exploration of high redshift galaxies, but also enables a detailed study of the rest-frame mid-infrared (mid-IR) and the optical emission lines of galaxies at intermed...</p> DTSTART;TZID=Asia/Shanghai:20240604T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240603T093254Z LOCATION: SUMMARY:Spatially Resolved Star Formation of Galaxies at z ~ 1 - 3 from HST and JWST Observations URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1837.htm END:VEVENT BEGIN:VEVENT UID:1747@kiaa.pku.edu.cn DTSTAMP:20240604T145329Z CREATED:20240604T145329Z DESCRIPTION:<p>Cosmological formation of globular cluster</p> DTSTART;TZID=Asia/Shanghai:20240605T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240604T145329Z LOCATION: SUMMARY:Cosmological formation of globular clusters URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1071/1747.htm END:VEVENT BEGIN:VEVENT UID:1484@kiaa.pku.edu.cn DTSTAMP:20240223T150728Z CREATED:20240223T150728Z DESCRIPTION:<p>Transients with fast brightness variance in UV/optical wavelengths (&quot;fast transients,&quot; such as early-phase supernovae, fast blue optical transients, kilonovae) are of great interest in astronomy. Although great progresses in time-domain astronomy have been made via wide, shallow, and day(s)-cadence surveys, the limited observing depth and low time resolution make traditional time-domain surveys...</p> DTSTART;TZID=Asia/Shanghai:20240606T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240223T150728Z LOCATION: SUMMARY:From Subaru to WFST: The Past, Present, and Future of Fast Transient Studies URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1484.htm END:VEVENT BEGIN:VEVENT UID:1782@kiaa.pku.edu.cn DTSTAMP:20240603T093651Z CREATED:20240603T093651Z DESCRIPTION:<p>The spin of neutron stars can be timed with exquisite precision and are seen observationally as pulsars. They are observed to spin-down steadily over long periods but once in a while, they can undergo a rapid and sudden increase in their spin, which is known as a glitch. For some cases, the glitch is followed by a post-glitch recovery. There are several models that predict the emission of conti...</p> DTSTART;TZID=Asia/Shanghai:20240607T123000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240603T093651Z LOCATION: SUMMARY:Glitching pulsars as sources of transient gravitational waves URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1782.htm END:VEVENT BEGIN:VEVENT UID:1836@kiaa.pku.edu.cn DTSTAMP:20240611T093532Z CREATED:20240611T093532Z DESCRIPTION:<p>Current and future galaxy surveys such as HETDEX, DESI, Euclid, PFS, and SPHEREx aim to address fundamental questions in cosmology. For all these galaxy surveys, galaxy clustering is the primary observable, so modeling the nonlinearities in galaxy clustering is essential to decipher the survey data. Perturbative modeling offers an efficient, flexible, and robust method to achieve this.In this t...</p> DTSTART;TZID=Asia/Shanghai:20240611T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240611T093532Z LOCATION: SUMMARY:Perturbative Modeling of Galaxy Large-scale Structure URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1836.htm END:VEVENT BEGIN:VEVENT UID:1483@kiaa.pku.edu.cn DTSTAMP:20240223T150919Z CREATED:20240223T150919Z DESCRIPTION:<p>With the fast development of high-precision large photometric surveys, weak lensing (WL) effects have become one of the major probes in cosmology. While the two-point shear correlations are the most extensively employed analyses, other statistics beyond that are desired because of the non-Gaussian nature of cosmic structures. In this presentation, I will discuss the cosmological application of ...</p> DTSTART;TZID=Asia/Shanghai:20240613T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240223T150919Z LOCATION: SUMMARY:Weak lensing cosmology beyond two-point shear correlations URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1483.htm END:VEVENT BEGIN:VEVENT UID:1781@kiaa.pku.edu.cn DTSTAMP:20240611T094629Z CREATED:20240611T094629Z DESCRIPTION:<p>What physical mechanisms heat the outer solar or stellar atmosphere to million-kelvin temperatures is a fundamental but long-standing open question. In particular, the solar corona in active-region cores contains an even hotter component reaching 10 MK, manifesting as persistent coronal loops in extreme ultraviolet and soft X-ray images, which imposes a stringent energy budget. Here, we present...</p> DTSTART;TZID=Asia/Shanghai:20240614T123000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240611T094629Z LOCATION: SUMMARY:Heating the Super-hot Corona in Solar Active Regions: Insights from RMHD Simulations URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1781.htm END:VEVENT BEGIN:VEVENT UID:1835@kiaa.pku.edu.cn DTSTAMP:20240617T094333Z CREATED:20240617T094333Z DESCRIPTION:<p>Despite the remarkable success of the Lambda Cold Dark Matter (LCDM) cosmological model, several challenges have recently emerged. One of the most prominent is the “Hubble tension”: the Hubble expansion rate (H_0) measured using the Cepheid-calibrated distance ladder of type Ia supernovae and the value extrapolated from the cosmic microwave background using LCDM disagree by 5 standard deviati...</p> DTSTART;TZID=Asia/Shanghai:20240618T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240617T094333Z LOCATION: SUMMARY:The strong-lensing revolution in the JWST-Rubin-Roman era: from resolving the Hubble tension to constraining baryonic feedback URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1835.htm END:VEVENT BEGIN:VEVENT UID:1482@kiaa.pku.edu.cn DTSTAMP:20240223T151119Z CREATED:20240223T151119Z DESCRIPTION:<p>While the exoplanetary field is replete with remarkable discoveries, perhaps the two most intriguing findings have been the detection of hot Jupiters – giant planets orbiting perilously close to their parent stars, and the startling abundance of super-Earths. The mere existence of these worlds was wholly unpredicted based on the expectations that were gleaned from centuries of observation of o...</p> DTSTART;TZID=Asia/Shanghai:20240620T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240223T151119Z LOCATION: SUMMARY:Towards a Unified Story for Planet Formation URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1482.htm END:VEVENT BEGIN:VEVENT UID:1780@kiaa.pku.edu.cn DTSTAMP:20240617T094925Z CREATED:20240617T094925Z DESCRIPTION:<p>Granulations are structures characterized by convection cells reaching the stellar surface and are well-known through observations of the Sun. However, similar granulation structures may also be present on the surfaces of the largest and brightest cool stars in the Universe—the red supergiants (RSGs)—potentially serving as the primary mechanism of their irregular light variations. As predicte...</p> DTSTART;TZID=Asia/Shanghai:20240621T123000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240617T094925Z LOCATION: SUMMARY:Granulation in Red Supergiants: The Scaling Relations URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1780.htm END:VEVENT BEGIN:VEVENT UID:1664@kiaa.pku.edu.cn DTSTAMP:20240617T144559Z CREATED:20240617T144559Z DESCRIPTION:<p>Turbulence features ubiquitously in the interstellar medium, especially in the high-redshift Universe. Photoionization models with turbulent ISM density fields can predict nebular emission lines more realistically than the former uniform density/pressure photoionization models. In this talk, we will briefly introduce a turbulent photoionization model grid created by the cutting-edge 3D Monte Ca...</p> DTSTART;TZID=Asia/Shanghai:20240624T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240617T144559Z LOCATION: SUMMARY:Photoionization models with turbulent structures URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1664.htm END:VEVENT BEGIN:VEVENT UID:1834@kiaa.pku.edu.cn DTSTAMP:20240624T095017Z CREATED:20240624T095017Z DESCRIPTION:<p>The JWST is ushering in a new era of observing galaxies in the reionization era, providing us new insights into this last major phase transition of the Universe. The Ly-alpha emission from young star forming galaxies, which is sensitive to the presence of neutral HI along the line of sight, has been used as an important probe of the reionization process. JWST/NIRSpec offers spectroscopic capabi...</p> DTSTART;TZID=Asia/Shanghai:20240625T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240624T095017Z LOCATION: SUMMARY:Probing Cosmic Reionization with JWST/NIRSpec Ly Observations URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1834.htm END:VEVENT BEGIN:VEVENT UID:1663@kiaa.pku.edu.cn DTSTAMP:20240625T093232Z CREATED:20240625T093232Z DESCRIPTION:<p>Unveiling the true nature of Dark Matter (DM), which manifests itself only through gravity, is one of the principal quests in physics. Leading candidates for DM are weakly interacting massive particles (WIMPs) or ultralight bosons (axions), at opposite extremes in mass scales, that have been postulated by competing theories to solve deficiencies in the Standard Model of particle physics. Wherea...</p> DTSTART;TZID=Asia/Shanghai:20240626T100000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240625T093232Z LOCATION: SUMMARY:Revealing Dark Matter under the Lens URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1663.htm END:VEVENT BEGIN:VEVENT UID:1779@kiaa.pku.edu.cn DTSTAMP:20240624T095424Z CREATED:20240624T095424Z DESCRIPTION:<p>Open clusters (OCs) are cradles of stars and building blocks of galaxies, offering insights into how stars and galaxies form. It is essential to precisely measure the parameters of OCs, such as age, metallicity, distance, dust extinction, stellar mass function (MF), and binary fraction. I propose a novel Bayesian framework that can identify OC candidates and simultaneously estimate these parame...</p> DTSTART;TZID=Asia/Shanghai:20240628T123000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240624T095424Z LOCATION: SUMMARY:Gaia + Bayesian Power: A Deep Dive into Open Cluster Mass Function & Binaries URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1779.htm END:VEVENT BEGIN:VEVENT UID:1662@kiaa.pku.edu.cn DTSTAMP:20240701T074602Z CREATED:20240701T074602Z DESCRIPTION:<p>The theory of core-collapse supernova (CCSN) has evolved significantly in the past few years with the help of &nbsp;long term 3D simulations. In this talk, I will present many new scientific results based on the large set of CCSN simulations calculated by the code Fornax, focusing on the important role of three dimensional effects. I will talk about theoretical observables such as explosion energy, ...</p> DTSTART;TZID=Asia/Shanghai:20240702T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240701T074602Z LOCATION: SUMMARY:New Results in Three-Dimensional Core-Collapse Supernova Theory URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1662.htm END:VEVENT BEGIN:VEVENT UID:1833@kiaa.pku.edu.cn DTSTAMP:20240701T120544Z CREATED:20240701T120544Z DESCRIPTION:<p>Recent observations reported a puzzling dearth of dark matter (DM) in a fraction of massive high-z galaxies and dwarf galaxies, challenging current simulation predictions within the standard ΛCDM scenario. This discrepancy underscores our limited understanding of the halo and galaxy structural evolution. Here, I will present a novel unified analytical framework for galaxy dynamical evolution d...</p> DTSTART;TZID=Asia/Shanghai:20240702T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240701T120544Z LOCATION: SUMMARY:Analytical Insights into Dark Matter Deficient Galaxies URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1833.htm END:VEVENT BEGIN:VEVENT UID:1665@kiaa.pku.edu.cn DTSTAMP:20240611T093952Z CREATED:20240611T093952Z DESCRIPTION:<p>Exoplanet atmospheres with imprints from their history open an important avenue to trace the origin and evolution of planets. With high-dispersion spectroscopy, we can resolve atomic and molecular spectral features into unique forests of lines that serve as fingerprints for identifying different species and probing structures and dynamics of exoplanet atmospheres. I will talk about high-resolut...</p> DTSTART;TZID=Asia/Shanghai:20240703T110000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240611T093952Z LOCATION: SUMMARY:Exoplanet atmospheres with high-resolution spectroscopy: chemistry, isotopes, and dynamics URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1665.htm END:VEVENT BEGIN:VEVENT UID:1668@kiaa.pku.edu.cn DTSTAMP:20240515T142813Z CREATED:20240515T142813Z DESCRIPTION:<p>When orbiting hotter stars, hot Jupiters are often highly inclined relative to their host star equator planes. By contrast, hot Jupiters orbiting cooler stars are more aligned. Prior attempts to explain this correlation between stellar obliquity and effective temperature have proven problematic. We show how resonance locking—the coupling of the planet&#39;s orbit to a stellar gravity mode (g-mode)...</p> DTSTART;TZID=Asia/Shanghai:20240708T110000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240515T142813Z LOCATION: SUMMARY:Damping Obliquities of Hot Jupiter Hosts by Resonance Locking URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1668.htm END:VEVENT BEGIN:VEVENT UID:1661@kiaa.pku.edu.cn DTSTAMP:20240812T101325Z CREATED:20240812T101325Z DESCRIPTION:<p>Despite the vital importance of interstellar dust to many areas of astronomy, its composition and properties are highly uncertain. The dust extinction curve (the relation of extinction vs. wavelength) depends on both the grain-size distribution and the chemistry of the dust, and is therefore a probe of dust properties. The dust extinction curve is typically characterized by R(V) ≡ A(V)/E(B − ...</p> DTSTART;TZID=Asia/Shanghai:20240816T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240812T101325Z LOCATION: SUMMARY:Unveiling the Milky Way Dust Extinction Curve in 3D URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1661.htm END:VEVENT BEGIN:VEVENT UID:1659@kiaa.pku.edu.cn DTSTAMP:20240812T102539Z CREATED:20240812T102539Z DESCRIPTION:<p>Current and future weak lensing surveys contain significant information about our universe. However, their optimal cosmological analysis is challenging, with traditional analyses often resulting in information loss due to reliance on summary statistics like two-point functions. While deep learning methods offer promise in capturing the complex non-linear features of these cosmological fields, t...</p> DTSTART;TZID=Asia/Shanghai:20240819T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240812T102539Z LOCATION: SUMMARY:Beyond Summary Statistics: Leveraging Generative Models for Field-Level Weak Lensing Analysis URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1659.htm END:VEVENT BEGIN:VEVENT UID:1660@kiaa.pku.edu.cn DTSTAMP:20240812T101801Z CREATED:20240812T101801Z DESCRIPTION:<p>In this study, we investigated the role of the inner halo&#39;s angular momentum distribution on bar formation and evolution processes. We performed a series of high-resolution N-body experiments with Milky Way-type disk galaxies. These models were initiated with similar disks but with varying inner halo angular momentum in the surrounding dark matter halo. The bar triggered earlier in the model wi...</p> DTSTART;TZID=Asia/Shanghai:20240823T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240812T101801Z LOCATION: SUMMARY:Role of dark matter halo angular momentum distribution on bar formation, evolution and dynamical friction URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1660.htm END:VEVENT BEGIN:VEVENT UID:1658@kiaa.pku.edu.cn DTSTAMP:20240813T114709Z CREATED:20240813T114709Z DESCRIPTION:<p>Stars born in dense clusters often form binary systems, surrounded by circumbinary discs of gas and dust. Misalignments between these discs and the binary orbit are common during stellar evolution, driven by dissipation. My research, utilizing 3D hydrodynamical simulations, focuses on the evolution of highly misaligned circumbinary discs. I demonstrate that polar-aligned circumbinary discs are ...</p> DTSTART;TZID=Asia/Shanghai:20240826T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240813T114709Z LOCATION: SUMMARY:The stellar environment's influence on protoplanetary discs and planet formation URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1658.htm END:VEVENT BEGIN:VEVENT UID:1746@kiaa.pku.edu.cn DTSTAMP:20240823T155559Z CREATED:20240823T155559Z DESCRIPTION:<p>Photometric and spectroscopic observations of individual stars, binaries, and group of stars in coeval populations offer valuable insights into various stellar characteristics, such as chemical abundance, radial velocity, multiplicity, mass, distance, and age. The chemical abundances provide critical information about the internal physics of stars, the interactions between planets and their hos...</p> DTSTART;TZID=Asia/Shanghai:20240829T150000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240823T155559Z LOCATION: SUMMARY:Exploring Stellar Astrophysics and Star-Planet Interactions Through Observational Studies URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1071/1746.htm END:VEVENT BEGIN:VEVENT UID:1745@kiaa.pku.edu.cn DTSTAMP:20240902T130744Z CREATED:20240902T130744Z DESCRIPTION:<p>Despite the efforts made in recent decades to obtain more realistic stellar models, considerable uncertainties still remain due to our incomplete knowledge of some complex physical processes that occur within them, such as accretion, convection, mass loss, rotation, to name a few of them. Modeling these processes still relies on empirical calibrations and this has a significant impact on theore...</p> DTSTART;TZID=Asia/Shanghai:20240903T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240902T130744Z LOCATION: SUMMARY:The role of mixing, mass-loss and rotation in stellar evolution URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1071/1745.htm END:VEVENT BEGIN:VEVENT UID:1655@kiaa.pku.edu.cn DTSTAMP:20240903T161844Z CREATED:20240903T161844Z DESCRIPTION:<p>The past and ongoing gravitational wave detections have fostered a wide interest in understanding the formation of binary black holes (BBHs). Several formation scenarios have been proposed, including the evolution of isolated massive binaries. While most of the observed merging black holes are at cosmological distances, and thus likely at low metallicity, the Small Magellanic Cloud (SMC) provid...</p> DTSTART;TZID=Asia/Shanghai:20240904T150000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240903T161844Z LOCATION: SUMMARY:Comprehensive population synthesis predictions for massive binary stars in the Small Magellanic Cloud URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1655.htm END:VEVENT BEGIN:VEVENT UID:1657@kiaa.pku.edu.cn DTSTAMP:20240828T101904Z CREATED:20240828T101904Z DESCRIPTION:<p>Fast radio bursts (FRBs) are typically milli-second-duration luminous radio transients whose source remain debatable. &nbsp;Caltech/ OVRO&#39;s Deep Synoptic Array-110 (DSA-110) is the only radio interferometer designed specifically for FRB searching and localization. &nbsp;By mid-2023, DSA-110 has doubled the number of localized FRBs. &nbsp;First, I will highlight the high-resolution burst morphology of a sample...</p> DTSTART;TZID=Asia/Shanghai:20240905T100000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240828T101904Z LOCATION: SUMMARY:Deep Synoptic Array and FRB URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1657.htm END:VEVENT BEGIN:VEVENT UID:1656@kiaa.pku.edu.cn DTSTAMP:20240830T094118Z CREATED:20240830T094118Z DESCRIPTION:<p>I will present a measurement of the supermassive black hole (SMBH) mass in NGC 383, a nearby lenticular galaxy hosting a low-power radio jet, based on ALMA observations of the CO(2-1) emission line with an angular resolution of 0.′′050 × 0.′′024 (≈ 16 pc × 8 pc). These observations spatially resolve the nuclear molecular gas disc down to ≈ 41300 Schwarzschild radii and the SMBH sphere of...</p> DTSTART;TZID=Asia/Shanghai:20240905T153000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240830T094118Z LOCATION: SUMMARY:A precise measurement of the supermassive black hole mass in the galaxy NGC 383 using molecular gas kinematics down to the circumnuclear disc URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1656.htm END:VEVENT BEGIN:VEVENT UID:1744@kiaa.pku.edu.cn DTSTAMP:20240903T161453Z CREATED:20240903T161453Z DESCRIPTION:<p>In the standard cosmological model, the matter content of the Universe is dominated by cold dark matter (CDM), collisionless particles that interact with ordinary matter (baryons) only through gravity. Gravitationally bound dark-matter halos form hierarchically, with the most massive systems growing through mergers of smaller ones. As structure assembles in this fashion, large dark-matter halos...</p> DTSTART;TZID=Asia/Shanghai:20240912T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240903T161453Z LOCATION: SUMMARY:Tensions on small scales: Too many galaxy-galaxy strong lenses in galaxy clusters? URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1071/1744.htm END:VEVENT BEGIN:VEVENT UID:1481@kiaa.pku.edu.cn DTSTAMP:20240812T104905Z CREATED:20240812T104905Z DESCRIPTION:<p>Supermassive black holes are extensively discussed in this talk:&nbsp;1) cosmic evolution of SMBHs;&nbsp;2) masses and spins;&nbsp;3) SMBH binaries and nano-Hz gravitational waves;&nbsp;4) Satellite black holes around SMBH;&nbsp;5) new opportunity of SMBH research in the JWST and VLTI era.BIOJianming Wang is astrophysics professor in IHEP. He got PhD in USTC in 1995 and originally from National University of Defense Te...</p> DTSTART;TZID=Asia/Shanghai:20240912T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240812T104905Z LOCATION: SUMMARY:Supermassive black holes in the Universe URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1481.htm END:VEVENT BEGIN:VEVENT UID:1778@kiaa.pku.edu.cn DTSTAMP:20240911T130130Z CREATED:20240911T130130Z DESCRIPTION:<p>Motivated by the vast gap between photometric and spectroscopic data volumes, there is great potential in using 5D kinematic information to identify and study substructures of the Milky Way. We identify substructures in the Galactic halo using 46,575 RR Lyrae stars (RRLs) from Gaia DR3 with the photometric metallicities and distances newly estimated by Li et al. (2023). Assuming a Gaussian prio...</p> DTSTART;TZID=Asia/Shanghai:20240913T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240911T130130Z LOCATION: SUMMARY:Identifying the Galactic Substructures in 5D Space Using All-sky RR Lyrae Stars in Gaia DR3 URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1778.htm END:VEVENT BEGIN:VEVENT UID:1480@kiaa.pku.edu.cn DTSTAMP:20240812T105227Z CREATED:20240812T105227Z DESCRIPTION:<p>Circumstellar disks as young as 0.5 Myr bear gaps and rings as tentative planet signposts, which aligns with accumulating evidence of early planet formation. However, such young disks are poorly understood both observationally and theoretically. They are likely affected by the star formation environment becoming warped or eccentric. The disk flow can become peculiar, and various instabilities f...</p> DTSTART;TZID=Asia/Shanghai:20240919T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240812T105227Z LOCATION: SUMMARY:Dynamic and Untamed: the early life of circumstellar disks URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1480.htm END:VEVENT BEGIN:VEVENT UID:1777@kiaa.pku.edu.cn DTSTAMP:20240918T180101Z CREATED:20240918T180101Z DESCRIPTION:<p>Weak G-band stars, or carbon-deficient red giants (CDGs), characterised by weak or absent G-band absorption of the CH molecule driven by low carbon abundances, have remained mysterious for decades. Here, we present a significant increase in the known CDG population identified through systematic spectroscopic surveys. This expanded sample confirms their rarity (&lt;1% of giants). Combining asterose...</p> DTSTART;TZID=Asia/Shanghai:20240920T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240918T180101Z LOCATION: SUMMARY:Unveiling the 70-year mystery of the nature of carbon-deficient red giants URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1777.htm END:VEVENT BEGIN:VEVENT UID:1832@kiaa.pku.edu.cn DTSTAMP:20240923T094201Z CREATED:20240923T094201Z DESCRIPTION:<p>Being the first spectral line of HI, Lyman-alpha permeates the cosmic web in emission. It has been largely used to study the close environment of galaxies and QSOs (Lyman-alpha blobs/nebulae); but being a resonant line it should scatter through the intergalactic medium. This should make Lyman-alpha an interesting candidate for Intensity Mapping (IM): the study of large-scale by integrating the ...</p> DTSTART;TZID=Asia/Shanghai:20240925T150000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240923T094201Z LOCATION: SUMMARY:Lyman-alpha Intensity Mapping with optical imaging surveys: Future prospects URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1832.htm END:VEVENT BEGIN:VEVENT UID:1479@kiaa.pku.edu.cn DTSTAMP:20240812T105339Z CREATED:20240812T105339Z DESCRIPTION:<p>The discovery of neutrino oscillation established a non-zero mass of neutrino. &nbsp;The origin of neutrino and its non-zero mass is an one of the most important experimental clues to the new physics beyond the standard model. &nbsp;Neutrinos are ubiquitous in the universe, accompanying most of the weak-interacting physics processes. I shall review natural and artificial sources of neutrinos with an emph...</p> DTSTART;TZID=Asia/Shanghai:20240926T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240812T105339Z LOCATION: SUMMARY:Quest for the origin of neutrinos URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1479.htm END:VEVENT BEGIN:VEVENT UID:1776@kiaa.pku.edu.cn DTSTAMP:20240923T132222Z CREATED:20240923T132222Z DESCRIPTION:<p>The study of the spectral energy distribution (SED) of active galactic nuclei (AGN) plays an important role in several aspects of the evolution of the galaxy. In this work, we model the black hole (BH) accretion flow for a wide range of BH mass and accretion rate. The accretion flow is divided into two regimes based on the Eddington-normalized accretion rate value - the ADAFs for low accretion ...</p> DTSTART;TZID=Asia/Shanghai:20240927T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240923T132222Z LOCATION: SUMMARY:AGN SED Modeling: AGN luminosity in the simulated universe and implications on the era of reionization URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1776.htm END:VEVENT BEGIN:VEVENT UID:1469@kiaa.pku.edu.cn DTSTAMP:20240812T111151Z CREATED:20240812T111151Z DESCRIPTION:<p>The Standard Model of particle physics assumes that fundamental physical constants, including the fine-structure constant alpha, are universal and constant. On the other hand, modern theories beyond the Standard Model predict or even require the variation of the fundamental constants. Recently, we developed a new method to probe the variation in alpha using narrow and strong [O III] emitting ga...</p> DTSTART;TZID=Asia/Shanghai:20241010T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240812T111151Z LOCATION: SUMMARY:Probing the spacetime variation of the fine-structure constant using emission-line galaxies URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1469.htm END:VEVENT BEGIN:VEVENT UID:1775@kiaa.pku.edu.cn DTSTAMP:20241008T133014Z CREATED:20241008T133014Z DESCRIPTION:<p>X-ray surveys have been an effective way to study growing supermassive black holes (SMBHs). Utilizing X-ray survey fields that have extensive multiwavelength data coverage, we can probe how SMBH growth links with the properties of their host galaxies, which will ultimately help to investigate the physical mechanisms behind the potential coevolution of SMBHs and their hosts. In my talk, I will p...</p> DTSTART;TZID=Asia/Shanghai:20241011T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20241008T133014Z LOCATION: SUMMARY:Investigating the link between the growth of SMBHs and their host galaxies with X-ray surveys URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1775.htm END:VEVENT BEGIN:VEVENT UID:1478@kiaa.pku.edu.cn DTSTAMP:20240812T105448Z CREATED:20240812T105448Z DESCRIPTION:<p>The so-called Hypervelocity stars (HVSs; with velocities even greater than 1000 km/s) were first predicted from the theoretical arguments of Hills (1988), and attributed to be the result of tidal interaction between a close stellar binary system and a supermassive black hole (SMBH) in the Galactic center, commonly referred to as the “Hills mechanism”. HVSs or High-Velocity stars (HiVels) can ...</p> DTSTART;TZID=Asia/Shanghai:20241017T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240812T105448Z LOCATION: SUMMARY:Hypervelocity stars: energetic guys “kissed” by massive black holes URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1478.htm END:VEVENT BEGIN:VEVENT UID:1774@kiaa.pku.edu.cn DTSTAMP:20241012T160923Z CREATED:20241012T160923Z DESCRIPTION:<p>Current efforts of the Event Horizon Telescope aim at resolving the black hole shadow, mainly with the goal to probe the nature of the black hole and thus the underlying theory of gravity. Here, including other lensing features, in particular multiple images either of individual sources or in form of the so-called photon rings, will allow to place much tighter constrains on the spacetime parame...</p> DTSTART;TZID=Asia/Shanghai:20241018T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20241012T160923Z LOCATION: SUMMARY:Gravitational Lensing in the Kerr Spacetime: An Analytic Approach for Light and High-Frequency Gravitational Waves URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1774.htm END:VEVENT BEGIN:VEVENT UID:1654@kiaa.pku.edu.cn DTSTAMP:20241012T160406Z CREATED:20241012T160406Z DESCRIPTION:<p>This collaborative talk introduces the recent work in COSMO-3D group at EPFL’s Laboratory of Astrophysics (LASTRO). Jiaxi Yu (PhD student) will begin with a historical review of cosmology. The Universe started from a Big Bang, followed by inflation. The emission of the first light of the Universe, cosmic microwave background (CMB), happened in an opaque and dark era of the Universe afterwards....</p> DTSTART;TZID=Asia/Shanghai:20241022T150000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20241012T160406Z LOCATION: SUMMARY:Mapping the 3D Universe: From the Past to the Future, Bridging Theories and Observations URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1654.htm END:VEVENT BEGIN:VEVENT UID:1831@kiaa.pku.edu.cn DTSTAMP:20241021T131020Z CREATED:20241021T131020Z DESCRIPTION:<p>The presence of large fractions of metal-poor stars in dwarf galaxies still belonging to GCs raises questions about cluster mass loss and their formation mechanisms. These high ratios of metal-poor GCs relative to the number of low-metallicity field stars could imply that clusters in dwarfs have not lost enough mass, compared to more massive galaxies, or that the formation of field stars was su...</p> DTSTART;TZID=Asia/Shanghai:20241023T153000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20241021T131020Z LOCATION: SUMMARY:The influence of GC evolution on the specific frequency in dwarf galaxies URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1831.htm END:VEVENT BEGIN:VEVENT UID:1477@kiaa.pku.edu.cn DTSTAMP:20240812T105613Z CREATED:20240812T105613Z DESCRIPTION:<p>Open clusters provide an ideal laboratory for testing and calibrating our understanding of stellar physics and single stellar population. In this talk, I will discuss how astronomers use open clusters as a well-defined single population of stars to study the Milky Way disk and stellar evolution. Additionally, I will explore how open clusters can be used to validate pipeline results from large p...</p> DTSTART;TZID=Asia/Shanghai:20241024T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240812T105613Z LOCATION: SUMMARY:Stellar physics and population in the open cluster lab (英文报告) URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1477.htm END:VEVENT BEGIN:VEVENT UID:1773@kiaa.pku.edu.cn DTSTAMP:20241014T104310Z CREATED:20241014T104310Z DESCRIPTION:<p>Galaxy clusters, as massive, virialized halos within the cosmic web, serve as ideal laboratories for advancing our understanding of cosmology, plasma physics, and the nature of dark matter. High-resolution spectroscopy in soft X-rays will open a new window to map multiphase gas in galaxy clusters and probe physics of the intracluster medium, including but not limited to chemical enrichment hist...</p> DTSTART;TZID=Asia/Shanghai:20241025T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20241014T104310Z LOCATION: SUMMARY:Galaxy Cluster Studies in the Era of High-resolution X-ray Spectroscopy URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1773.htm END:VEVENT BEGIN:VEVENT UID:1830@kiaa.pku.edu.cn DTSTAMP:20241028T113331Z CREATED:20241028T113331Z DESCRIPTION:<p>The cosmic microwave background (CMB) holds valuable information about the early Universe, including an imprint of its mass distribution that overshadows the faint signal from primordial gravitational waves, likely generated during inflation. Removing this imprint is crucial for future CMB observations to tightly constrain the tensor-to-scalar ratio r. This talk focuses on achieving the tightes...</p> DTSTART;TZID=Asia/Shanghai:20241030T153000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20241028T113331Z LOCATION: SUMMARY:Constraints on the tensor-to-scalar ratio r via a likelihood-based, optimal lensing reconstruction URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1830.htm END:VEVENT BEGIN:VEVENT UID:1476@kiaa.pku.edu.cn DTSTAMP:20240812T105732Z CREATED:20240812T105732Z DESCRIPTION:<p>Planets between the size of Earth and Neptune, also known as sub-Neptunes, pose a conundrum. They are absent in the solar system, but more than half of all Sun-like stars in the Galaxy host a sub-Neptune interior to 1 au. Although the number of sub-Neptunes atmospheres probed so far has been very low, a major breakthrough in exo-atmospheres science is happening right now thanks to the increased...</p> DTSTART;TZID=Asia/Shanghai:20241031T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240812T105732Z LOCATION: SUMMARY:Current and future characterization of small exoplanet atmospheres from ground and space URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1476.htm END:VEVENT BEGIN:VEVENT UID:1772@kiaa.pku.edu.cn DTSTAMP:20241030T142924Z CREATED:20241030T142924Z DESCRIPTION:<p>QPE(Quasi Periodic Eruptions) is new type of &nbsp;X-ray transient event first observed in 2018. It&#39;s characterized by the periodic X-ray outbursts in contrast to its quiescent radiation. One of the proposed model for QPE events involves a secondary body orbiting around the central massive black hole, generating periodic flares as the mass of the secondary object accretes onto the BH. These systems ...</p> DTSTART;TZID=Asia/Shanghai:20241101T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20241030T142924Z LOCATION: SUMMARY:Finding QPE-like systems in MOCCA simulation URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1772.htm END:VEVENT BEGIN:VEVENT UID:1743@kiaa.pku.edu.cn DTSTAMP:20241104T101439Z CREATED:20241104T101439Z DESCRIPTION:<p>TBD</p> DTSTART;TZID=Asia/Shanghai:20241106T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20241104T101439Z LOCATION: SUMMARY:A chemical survey of exoplanet atmospheres with Ariel URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1071/1743.htm END:VEVENT BEGIN:VEVENT UID:1829@kiaa.pku.edu.cn DTSTAMP:20241101T163500Z CREATED:20241101T163500Z DESCRIPTION:<p>Supermassive black holes (SMBHs) are indispensable components of galaxy ecosystems. Their origin, growth, and feedback to the host galaxies are among the most fundamental questions in galaxy formation. In this talk, I will introduce a theoretical framework that coherently describes the formation of SMBHs from their seeding epoch to the present within the cosmological context. I will show that t...</p> DTSTART;TZID=Asia/Shanghai:20241106T153000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20241101T163500Z LOCATION: SUMMARY:Breeding seeds to grow supermassive black holes in the cosmological context: theory and semi-analytical forecasts URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1829.htm END:VEVENT BEGIN:VEVENT UID:1475@kiaa.pku.edu.cn DTSTAMP:20240812T105943Z CREATED:20240812T105943Z DESCRIPTION:<p>Recent observations from ALMA and JWST have revealed the complex and turbulent nature of galaxies at high redshift, during the epoch of formation of globular clusters. The emergence of large disks at cosmic dawn (z &gt; 10) and the almost ubiquity of massive star forming clumps at cosmic noon (z~2) question the formation scenarios of globular clusters. Although gravitational lensing pushes the obs...</p> DTSTART;TZID=Asia/Shanghai:20241107T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240812T105943Z LOCATION: SUMMARY:Cosmic evolution of the physical conditions for star and star cluster formation URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1475.htm END:VEVENT BEGIN:VEVENT UID:1771@kiaa.pku.edu.cn DTSTAMP:20241104T102710Z CREATED:20241104T102710Z DESCRIPTION:<p>Massive galaxies usually observed as symmetric stellar motions and can be fitted well by the commonly used symmetric dynamical models. However, the stellar kinematics of many low-mass galaxies typically contain lots of small patches, causing the stellar second moment of velocity distribution to be non-smooth in small-scales and far from symmetry, we call these patches kinematical small-scale fl...</p> DTSTART;TZID=Asia/Shanghai:20241108T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20241104T102710Z LOCATION: SUMMARY:A study on Kinematical Small-scale Fluctuations Vary with Galaxy Surface Density URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1771.htm END:VEVENT BEGIN:VEVENT UID:1828@kiaa.pku.edu.cn DTSTAMP:20241111T100743Z CREATED:20241111T100743Z DESCRIPTION:<p>The increasing sophistication of research and data quality has revealed a complex interplay between the internal and external environments of galaxies. While galaxies are demonstrably connected to their cosmic ecosystems, their interiors are also comprised of diverse components with intricate interactions, forming a &quot;galaxy ecosystem&quot;. Stars and the interstellar medium (ISM) are two crucial con...</p> DTSTART;TZID=Asia/Shanghai:20241113T153000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20241111T100743Z LOCATION: SUMMARY:Two Bridges in Galaxy Ecosystem: Star – InterStellar Medium Interaction and Observation – Theory Connection [EN] URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1828.htm END:VEVENT BEGIN:VEVENT UID:1742@kiaa.pku.edu.cn DTSTAMP:20241111T161103Z CREATED:20241111T161103Z DESCRIPTION:<p>Using a novel new teaching tool that uses a game engine to create an interactive astronomy universe Professor Matthew Bailes will talk about the highlights of the MeerTime program at MeerKAT. These include the discovery and timing of many new pulsars in globular clusters, giant pulse studies, many new pulsar masses, insights from the eclipses of the double pulsar and a tantalising Hellings and ...</p> DTSTART;TZID=Asia/Shanghai:20241114T100000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20241111T161103Z LOCATION: SUMMARY:Highlights of the MeerTime Key Science Project with MeerKAT [EN] URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1071/1742.htm END:VEVENT BEGIN:VEVENT UID:1474@kiaa.pku.edu.cn DTSTAMP:20240812T110139Z CREATED:20240812T110139Z DESCRIPTION:<p>The Einstein Probe (EP, renamed 天关 in Chinese last week), launched on January 9th, 2024, is a space X-ray observatory of the Chinese Academy of Sciences in collaboration with ESA, MPE and CNES. It is detecting high-energy transient and variable sources in the X-ray band with better sensitivity and spatial resolution by at least one order of magnitude than the other operating wide-field monito...</p> DTSTART;TZID=Asia/Shanghai:20241114T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240812T110139Z LOCATION: SUMMARY:Einstein Probe: starting to reveal a deeper and clearer view of the dynamic X-ray universe [EN] URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1474.htm END:VEVENT BEGIN:VEVENT UID:1770@kiaa.pku.edu.cn DTSTAMP:20241111T101501Z CREATED:20241111T101501Z DESCRIPTION:<p>The Voids-within-Voids-within-Voids (VVV) project developed a series of extremely high-resolution N-body simulations to study haloes over the entire range of ΛCDM halo masses, from Earth mass to the largest clusters. In this talk, I will present our latest results about how baryons could modify these results for haloes with masses between 10^4 and 10^7 M_sun, below the threshold for galaxy for...</p> DTSTART;TZID=Asia/Shanghai:20241115T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20241111T101501Z LOCATION: SUMMARY:Halo Responses to Baryonic Mechanisms at Small Scale [EN] URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1770.htm END:VEVENT BEGIN:VEVENT UID:1653@kiaa.pku.edu.cn DTSTAMP:20241107T095050Z CREATED:20241107T095050Z DESCRIPTION:<p>Numerical integrations of Kepler-like tightly packed planetary systems show that they are chaotic, with fairly short Lyapunov times, but that they can be stable against planet-planet or planet-star collisions for billions of years. Recent work by Petit et al. showed that this behavior was due to the overlap of three-body mean motion resonances. Caleb Lammers, Sam Hadden and I recently showed th...</p> DTSTART;TZID=Asia/Shanghai:20241120T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20241107T095050Z LOCATION: SUMMARY:[PDS seminar] The instability mechanism of compact multiplanet systems [EN] URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1653.htm END:VEVENT BEGIN:VEVENT UID:1827@kiaa.pku.edu.cn DTSTAMP:20241118T104713Z CREATED:20241118T104713Z DESCRIPTION:<p>In the past few years, we develop a method to estimate the dust attenuation curve of galaxies from full optical spectral fitting. One important advantage of this method is that the estimated dust attenuation curve is independent of the shape of theoretical dust attenuation curves. Based on the method, we investigate the dust attenuation in both stellar populations and ionized gas in kpc-scale r...</p> DTSTART;TZID=Asia/Shanghai:20241120T153000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20241118T104713Z LOCATION: SUMMARY:Estimating and Studying Dust Attenuation From Galactic Spectra [EN] URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1827.htm END:VEVENT BEGIN:VEVENT UID:1652@kiaa.pku.edu.cn DTSTAMP:20241111T165312Z CREATED:20241111T165312Z DESCRIPTION:<p>The variations in the size of galaxies, and consequently, the formation of Low Surface Brighntess Galaxies (LSBGs) could be followed from one of two different effects: variations in the spin parameter of the halo (λ) or variations in the density of dark matter halos (McGaugh 2021). We test both scenarios by employing a simulated sample of galaxies drawn from the TNG100 run of the IllustrisTNG ...</p> DTSTART;TZID=Asia/Shanghai:20241121T100000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20241111T165312Z LOCATION: SUMMARY:On the Formation, Evolution and the Environment of Low Surface Brightness Galaxies [EN] URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1652.htm END:VEVENT BEGIN:VEVENT UID:1473@kiaa.pku.edu.cn DTSTAMP:20240812T110239Z CREATED:20240812T110239Z DESCRIPTION:<p>The current model of accretion disks, that of Shakura and Sunyaev (1973) asserts that such disks are geometrically thin, and are prone to a number of instabilities. One such instability is that of fragmentation due to self-gravity at radii larger than a few hundred black hole gravitational radii, which would limit the mass accretion rate to be well below that observed to occur. Recent GIZMO (La...</p> DTSTART;TZID=Asia/Shanghai:20241121T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240812T110239Z LOCATION: SUMMARY:A new picture of active galactic nuclei disks [EN] URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1473.htm END:VEVENT BEGIN:VEVENT UID:1769@kiaa.pku.edu.cn DTSTAMP:20241118T112300Z CREATED:20241118T112300Z DESCRIPTION:<p>Observations have shown that the termination of the star-forming activity in galaxies (quenching of star formation) is closely related to the structure of the galaxies, in the sense that passive galaxies tend to possess more compact structure. The surface mass density in the core region effectively describes the compactness of galaxies, and therefore have served to be one of the most sensitive ...</p> DTSTART;TZID=Asia/Shanghai:20241122T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20241118T112300Z LOCATION: SUMMARY:On the Role of Structural Bimodality on Galaxy Quenching in Local Universe [EN] URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1769.htm END:VEVENT BEGIN:VEVENT UID:1826@kiaa.pku.edu.cn DTSTAMP:20241125T102909Z CREATED:20241125T102909Z DESCRIPTION:<p>The standard cosmological model (ΛCDM) relies on six free parameters, five of which have direct cosmological origins, while the sixth, the optical depth (τ), is an ad hoc parameter used to model the scattering effects experienced by cosmic microwave background (CMB) photons. CMB photons decoupled from the primordial plasma at z ~ 1100 when neutral hydrogen formed, reducing the abundance of fr...</p> DTSTART;TZID=Asia/Shanghai:20241127T153000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20241125T102909Z LOCATION: SUMMARY:Five parameters are all you need [EN] URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1826.htm END:VEVENT BEGIN:VEVENT UID:1472@kiaa.pku.edu.cn DTSTAMP:20240812T110401Z CREATED:20240812T110401Z DESCRIPTION:<p>Enceladus, a small icy satellite of Saturn, was found to have a subsurface water ocean and evidence of ongoing hydrothermal activity in the seafloor. The ocean water, sampled via a plume, was inferred to contain substantial levels of inorganic and organic carbon as well as ammonia. However, there are very few constraints on the availability of other bio-essential nutrients, including phosphorus...</p> DTSTART;TZID=Asia/Shanghai:20241128T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240812T110401Z LOCATION: SUMMARY:Water chemistry of the Enceladus ocean and the habitability of icy moons [EN] URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1472.htm END:VEVENT BEGIN:VEVENT UID:1768@kiaa.pku.edu.cn DTSTAMP:20241125T102559Z CREATED:20241125T102559Z DESCRIPTION:<p>In the standard LambdaCDM cosmological framework, cosmic structures grow through a hierarchical process. As fundamental building blocks of the dark matter universe, halos are believed to follow a self-similar structure distribution. Thus, we could stacking the weak lensing signal of multiple halos with the galaxy-galaxy lensing (gglens) method, and obtain the average profile of halos. (A.) With...</p> DTSTART;TZID=Asia/Shanghai:20241129T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20241125T102559Z LOCATION: SUMMARY:The research of dark matter halos with galaxy-galaxy lensing method URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1768.htm END:VEVENT BEGIN:VEVENT UID:1741@kiaa.pku.edu.cn DTSTAMP:20241129T163019Z CREATED:20241129T163019Z DESCRIPTION:<p>The new generation of infrared high-contrast imagers and sub-mm interferometer has been revolutionising our view of planet formation for the last decade. Protoplanetary discs have now been imaged at a high level of detail, revealing a wealth of structures including cavities, annular gaps, spiral arms, shadows and asymmetries. In order to connect these structures to forming planets and provide t...</p> DTSTART;TZID=Asia/Shanghai:20241204T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20241129T163019Z LOCATION: SUMMARY:Imaging Giant Planet Formation [EN] URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1071/1741.htm END:VEVENT BEGIN:VEVENT UID:1825@kiaa.pku.edu.cn DTSTAMP:20241129T133444Z CREATED:20241129T133444Z DESCRIPTION:<p>The detection of the extended Lyman-alpha emission (or Lyman-alpha halos) around star-forming galaxies opens a new window for probing the circum-galactic medium (CGM) at high redshifts. With IFU observations (e.g., through MUSE), we are already capable of measuring the spatially resolved Lya spectra around individual galaxies, revealing a diverse population of the Lya emission. However, interpr...</p> DTSTART;TZID=Asia/Shanghai:20241204T153000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20241129T133444Z LOCATION: SUMMARY:Emulating Extended Lyman Alpha Halos Around Star-Forming Galaxies [EN] URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1825.htm END:VEVENT BEGIN:VEVENT UID:1471@kiaa.pku.edu.cn DTSTAMP:20240812T110737Z CREATED:20240812T110737Z DESCRIPTION:<p>Galaxy groups and clusters are the least massive systems where the bulk of baryons are accounted for and also the most massive systems that are gravitationally bound. They contain a wealth of galaxies sampling the broad spectra of galaxy properties, including the most massive galaxies (and probably the most massive supermassive black holes) and galaxies with the highest velocities in the univer...</p> DTSTART;TZID=Asia/Shanghai:20241205T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240812T110737Z LOCATION: SUMMARY:Multi-phase medium in galaxy groups and clusters [EN] URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1471.htm END:VEVENT BEGIN:VEVENT UID:1767@kiaa.pku.edu.cn DTSTAMP:20241129T163625Z CREATED:20241129T163625Z DESCRIPTION:<p>The Primordial non-Gaussianity provides fundamental insights into the early Universe and constitutes a crucial area of research in contemporary cosmology. Recently, we extended the cosmological analysis presented in Ibitoye2024 beyond the intergalactic medium (IGM) to investigate the primordial non-Gaussianity parameter (f^0_NL) in the squeezed limit, using the auto- and cross-power spectra of ...</p> DTSTART;TZID=Asia/Shanghai:20241206T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20241129T163625Z LOCATION: SUMMARY:Investigating the Squeezed Limit of Primordial Non-Gaussianity: New Constraints from CMB Anisotropies [EN] URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1767.htm END:VEVENT BEGIN:VEVENT UID:1824@kiaa.pku.edu.cn DTSTAMP:20241209T103046Z CREATED:20241209T103046Z DESCRIPTION:<p>Since DESI has released their cosmological constraints from BAO and Full-shape Analysis with DESI Y1 data in April and November respectively, in the seminar next week, Siyi Zhao and Wenshuo Xu (both are 4th year graduate students) are going to briefly present and discuss DESI Y1 results, including a general introduction to DESI project, methodology and their key cosmological constraints. Welcom...</p> DTSTART;TZID=Asia/Shanghai:20241211T153000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20241209T103046Z LOCATION: SUMMARY:Discussion on DESI Y1 results [EN] URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1824.htm END:VEVENT BEGIN:VEVENT UID:1740@kiaa.pku.edu.cn DTSTAMP:20241206T112027Z CREATED:20241206T112027Z DESCRIPTION:<p>Dark Matter (DM) is the clearest sign that the Standard Model of particle physics is incomplete. &nbsp;A determination of the DM particle mass will rule out entire classes of hypothetical extensions to the Standard Model, thus pointing the correct path towards New Physics. &nbsp;In this talk, I describe how gravitational lensing can differentiate between the two top contenders for DM: ultra-massive (WIMP...</p> DTSTART;TZID=Asia/Shanghai:20241212T100000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20241206T112027Z LOCATION: SUMMARY:Dark Matter under the Gravitational Lens [EN] URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1071/1740.htm END:VEVENT BEGIN:VEVENT UID:1470@kiaa.pku.edu.cn DTSTAMP:20240812T110948Z CREATED:20240812T110948Z DESCRIPTION:<p>As datasets continue to grow, machine learning/artificial intelligence (ML/AI) has taken on an increasingly large role in scientific analyses as both a practical necessity (to handle the data volumes) but also as a way to &quot;bypass&quot; theoretical models by learning directly from the data. However, this speed, complexity, and flexibility also have proved to be one of the main challenges involved in ...</p> DTSTART;TZID=Asia/Shanghai:20241212T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240812T110948Z LOCATION: SUMMARY:Trust me, I am an Astrophysics Foundation Model [EN] URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1470.htm END:VEVENT BEGIN:VEVENT UID:1766@kiaa.pku.edu.cn DTSTAMP:20241209T100452Z CREATED:20241209T100452Z DESCRIPTION:<p>The mass distribution of black holes identified through X-ray emission suggests a paucity of black holes in the mass range of 3 to 5 solar masses. Modified theories have been devised to explain this mass gap, and it is suggested that natal kicks during a supernova explosion can more easily disrupt binaries with lower-mass black holes. Although recent Laser Interferometer Gravitational-Wave Obse...</p> DTSTART;TZID=Asia/Shanghai:20241213T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20241209T100452Z LOCATION: SUMMARY:A potential mass-gap black hole in a wide binary with a circular orbit URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1766.htm END:VEVENT BEGIN:VEVENT UID:1468@kiaa.pku.edu.cn DTSTAMP:20240909T102424Z CREATED:20240909T102424Z DESCRIPTION:<p>Jupiter&#39;s radio emissions have been intensively studied since their discovery some 70 years ago. Space missions have extended these studies to radio emissions from all planetary magnetospheres in the solar system. Main emission characteristics have been determined (source location, directivity, power, polarization, etc.) and their microscopic generation process elucidated (primarily the electro...</p> DTSTART;TZID=Asia/Shanghai:20241219T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20240909T102424Z LOCATION: SUMMARY:Magnetospheric Radio Emissions: from Jupiter to exoplanets and stars [EN] URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1468.htm END:VEVENT BEGIN:VEVENT UID:1765@kiaa.pku.edu.cn DTSTAMP:20241216T101403Z CREATED:20241216T101403Z DESCRIPTION:<p>We present the stellar obliquity measurement of TOI-880 c (TOI-880.01) using Rossiter-McLaughlin (RM) observations obtained with the Keck Planet Finder (KPF). TOI-880 is a compact multi-transiting system with 3 transiting planets. Our independent analysis revealed that the host star is a K-type star. Planet b (TOI-880.02) has a radius of 2.23 ± 0.10R⊕ and an orbital period of 2.6 days; planet ...</p> DTSTART;TZID=Asia/Shanghai:20241220T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20241216T101403Z LOCATION: SUMMARY:TOI-880 Has An Aligned, Coplanar Multi-planet System [EN] URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1765.htm END:VEVENT BEGIN:VEVENT UID:1651@kiaa.pku.edu.cn DTSTAMP:20241224T141000Z CREATED:20241224T141000Z DESCRIPTION:<p>The James Webb Space Telescope (JWST) is transforming our understanding on galaxy formation and evolution, revealing distant galaxies deep into the epoch of reionization and uncovering red sources that were simply unknown pre-JWST. In this talk, I will discuss two key areas, with a focus on the challenges in modeling the spectral energy distributions in the JWST era. First, a central science go...</p> DTSTART;TZID=Asia/Shanghai:20241224T150000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20241224T141000Z LOCATION: SUMMARY:Uncovering Early Galaxy Formation with JWST: A Modeling Perspective URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1651.htm END:VEVENT BEGIN:VEVENT UID:1823@kiaa.pku.edu.cn DTSTAMP:20241223T105521Z CREATED:20241223T105521Z DESCRIPTION:<p>As one main target of cosmological surveys, the galaxy peculiar velocity field encodes information about the cosmic structure growth history and significantly contributes to the study of dark energy and dark matter. Its detection is typically made by the redshift space distortion (RSD) and kinetic Sunyaev-Zel’dovich (kSZ) effects in cosmology. In this talk, I will present high signal-to-noise ...</p> DTSTART;TZID=Asia/Shanghai:20241225T153000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20241223T105521Z LOCATION: SUMMARY:Studying cosmology and astrophysics by the synergy of RSD and kSZ effects URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1073/1823.htm END:VEVENT BEGIN:VEVENT UID:1764@kiaa.pku.edu.cn DTSTAMP:20241223T111923Z CREATED:20241223T111923Z DESCRIPTION:<p>Extinction correction is crucial for understanding the intrinsic properties of celestial objects within and beyond the Milky Way, especially with Gaia’s photometric precision reaching millimagnitude levels. Leveraging millions of high-quality spectra and precise atmospheric parameters from LAMOST, we have achieved unprecedented accuracy in extinction measurements. Using the “star-pair” techn...</p> DTSTART;TZID=Asia/Shanghai:20241227T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20241223T111923Z LOCATION: SUMMARY:On Precise Correction of the Milky Way Dust Extinction URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1764.htm END:VEVENT BEGIN:VEVENT UID:1763@kiaa.pku.edu.cn DTSTAMP:20241226T093710Z CREATED:20241226T093710Z DESCRIPTION:<p>The first two-year results of JWST have unveiled an unexpectedly large number of accreting black holes in the early Universe. Unlike the general populations of super massive black holes at the low redshifts, these early black holes exhibit distinctly different properties. They appear over-massive compared to the stellar content of their host galaxies, generally show non-detection in the hard X-...</p> DTSTART;TZID=Asia/Shanghai:20250103T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20241226T093710Z LOCATION: SUMMARY:Deciphering the intriguing nature of early AGN with JWST URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1763.htm END:VEVENT BEGIN:VEVENT UID:1467@kiaa.pku.edu.cn DTSTAMP:20241230T130554Z CREATED:20241230T130554Z DESCRIPTION:<p>The field of asteroseismology has grown explosively in the past two decades. It has evolved from bespoke examination of individual variable stars, to now having become both our main means of constraining stellar properties at large scale, and our sole observational probe into the astrophysics of their interiors. I will lay out recent developments of its observational methods and discoveries, pa...</p> DTSTART;TZID=Asia/Shanghai:20250106T090000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20241230T130554Z LOCATION: SUMMARY:The Coming Asteroseismic Revolution URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1467.htm END:VEVENT BEGIN:VEVENT UID:1650@kiaa.pku.edu.cn DTSTAMP:20250106T115750Z CREATED:20250106T115750Z DESCRIPTION:<p>Gravitational waves (GWs) from binary neutron stars (BNSs) offer valuable understanding of the nature of compact objects and hadronic matter. However, the analyses accompanied require massive computational power due to the difficulties in Bayesian stochastic sampling. The third-generation (3G) GW detectors are expected to detect BNS signals with significantly extended signal duration, detection...</p> DTSTART;TZID=Asia/Shanghai:20250106T150000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250106T115750Z LOCATION: SUMMARY:Decoding binary neutron stars with the next-generation gravitational wave detectors: localization, parameter estimation, and equations of state URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1650.htm END:VEVENT BEGIN:VEVENT UID:1466@kiaa.pku.edu.cn DTSTAMP:20250102T104216Z CREATED:20250102T104216Z DESCRIPTION:<p>Extracting information from stochastic fields is a ubiquitous task in science. &nbsp;However, from cosmology to biology, it tends to be done either through correlation analyses, which is often too limited to capture the full complexity, or through the use of neural nets, which require large training sets and lack interpretability. &nbsp;I will present a new approach that borrows ideas from both extremes ...</p> DTSTART;TZID=Asia/Shanghai:20250109T090000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250102T104216Z LOCATION: SUMMARY:How to quantify textures and random fields in astrophysics? URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1466.htm END:VEVENT BEGIN:VEVENT UID:1465@kiaa.pku.edu.cn DTSTAMP:20250102T104534Z CREATED:20250102T104534Z DESCRIPTION:<p>As the only large spiral galaxy in which we can study a significant fraction of the individual stars, the Milky Way offers astronomers a unique laboratory to study the processes that shape galaxies. As much of our fundamental understanding of astrophysics is anchored in the Milky Way, study of our Galaxy is critical to broad areas of astrophysics, including extragalactic astronomy. Ongoing surv...</p> DTSTART;TZID=Asia/Shanghai:20250110T090000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250102T104534Z LOCATION: SUMMARY:Milky Way Structure and Dynamics URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1465.htm END:VEVENT BEGIN:VEVENT UID:1762@kiaa.pku.edu.cn DTSTAMP:20250107T115103Z CREATED:20250107T115103Z DESCRIPTION:<p>The faint, diffuse side of the Universe is largely unexplored, with numerous interesting low surface brightness (LSB) phenomena awaiting to be mapped and understood. With state-of-the-art instruments such as Euclid, Rubin and Roman, we are starting to access a wealth of unprecedentedly deep datasets that are ideally suited for LSB science in the next decade. To fully unlock the potential of the...</p> DTSTART;TZID=Asia/Shanghai:20250110T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250107T115103Z LOCATION: SUMMARY:The Misty and Mysterious Low Surface Brightness Universe Imaged by Dragonfly URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1762.htm END:VEVENT BEGIN:VEVENT UID:1648@kiaa.pku.edu.cn DTSTAMP:20250217T104013Z CREATED:20250217T104013Z DESCRIPTION:<p>天文及深空科学是主要由实测驱动的学科。观测设备的实测精度和能力的显著提高会大大促进人类对宇宙的认知，包括21世纪所面临的几个重大挑战包括暗物质、暗能量研究，高红移宇宙，以及外行星和生命起源。这些重大科学问题的攻克、前沿研究的突破性进展，已经越来越依赖于观测设备能力的不断提升，包括提高观测的灵敏度、谱分辨率、时间分辨率、角分辨率以及拓展波段覆盖区域。这些观测设备就需要功能强大性能卓越的焦面仪器系统...</p> DTSTART;TZID=Asia/Shanghai:20250218T150000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250217T104013Z LOCATION: SUMMARY:面向天文观测和深空探测的光电探测技术 [中文报告] URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1648.htm END:VEVENT BEGIN:VEVENT UID:1464@kiaa.pku.edu.cn DTSTAMP:20250220T140000Z CREATED:20250220T140000Z DESCRIPTION:<p>In this area of rapid development of AI, astronomers&#39; work is also evolving. What should we focus in training our students and our computers? In this talk I will present some of my thoughts on the subject and hope the audience will share in the discussion.BIOCharling Tao is an Emerita Director of Research in CNRS CPPM (Centre de Physique de Particules de Marseille) where she co-created the cosm...</p> DTSTART;TZID=Asia/Shanghai:20250220T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250220T140000Z LOCATION: SUMMARY:What is left for astronomers to do in the era of Artificial Intelligence? URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1464.htm END:VEVENT BEGIN:VEVENT UID:1463@kiaa.pku.edu.cn DTSTAMP:20250227T140000Z CREATED:20250227T140000Z DESCRIPTION:<p>The inner structures of active galactic nuclei (AGNs) are essential for probing the fundamental parameters of the central supermassive black hole (BH), understanding accretion physics, and investigating the physical connection between the BH and its host galaxy. The reverberation mapping (RM) technique has been widely used to study the broad-line region (BLR), the dust torus, and the accretion ...</p> DTSTART;TZID=Asia/Shanghai:20250227T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250227T140000Z LOCATION: SUMMARY:Probing Active Galactic Nuclei with unprecedented precision — insights from VLTI/GRAVITY(+) URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1463.htm END:VEVENT BEGIN:VEVENT UID:1761@kiaa.pku.edu.cn DTSTAMP:20250224T152306Z CREATED:20250224T152306Z DESCRIPTION:<p>Luminous high-z quasars provide direct probes of the buildup of supermassive black holes, the primeval massive galaxies hosting them, and the intergalactic medium during the epoch of reionization. Despite its extraordinary capabilities, a significant challenge remains: the lack of quasar samples at redshift larger than 7. The Euclid space telescope offers a promising avenue to enrich our quasar...</p> DTSTART;TZID=Asia/Shanghai:20250228T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250224T152306Z LOCATION: SUMMARY:First Euclid High-z Quasars In the Wide Survey URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1761.htm END:VEVENT BEGIN:VEVENT UID:1647@kiaa.pku.edu.cn DTSTAMP:20250214T110857Z CREATED:20250214T110857Z DESCRIPTION:<p>Galaxy quenching is a crucial phase of galaxy evolution. For years the over-quenching problem has posed a big challenge to galaxy evolution models at low redshift. In this talk, I will introduce how we improve the semi-analytic model GAEA step-by-step to reproduce the observed quenched fractions, and the lessons we learned. Then we apply this model to high redshift to understand the galaxy quen...</p> DTSTART;TZID=Asia/Shanghai:20250306T100000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250214T110857Z LOCATION: SUMMARY:Galaxy quenching from the perspective of semi-analytic model GAEA [EN] URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1647.htm END:VEVENT BEGIN:VEVENT UID:1462@kiaa.pku.edu.cn DTSTAMP:20250306T140000Z CREATED:20250306T140000Z DESCRIPTION:<p>SVOM (Space-based multiband Variable Object Monitor) is a Chinese-French space mission mainly designed to study Gamma-Ray Bursts. The satellite has four instruments to detect and localize the prompt GRB emission and measure the evolution of the afterglow in the visible band and in soft X-rays, and a VHF communication system enabling the fast transmission of SVOM alerts to the ground. The ground...</p> DTSTART;TZID=Asia/Shanghai:20250306T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250306T140000Z LOCATION: SUMMARY:The progress of the SVOM Mission [EN] URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1462.htm END:VEVENT BEGIN:VEVENT UID:1760@kiaa.pku.edu.cn DTSTAMP:20250303T100240Z CREATED:20250303T100240Z DESCRIPTION:<p>The interstellar medium (ISM) is turbulent, and the energy sources driving this turbulence, particularly in HI gas, remain uncertain. Recently, stellar feedback, especially from supernovae (SNe), has been proposed as a potential mechanism for energy injection into the ISM. However, the specific processes involved are still unclear and require observational evidence. Using deep HI datacubes from...</p> DTSTART;TZID=Asia/Shanghai:20250307T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250303T100240Z LOCATION: SUMMARY:Turbulent HI Gas Driven by the SN Bubbles [EN] URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1760.htm END:VEVENT BEGIN:VEVENT UID:1461@kiaa.pku.edu.cn DTSTAMP:20250313T140000Z CREATED:20250313T140000Z DESCRIPTION:<p>The detections of gravitational waves (GWs) from merging binary black holes (BHs) have motivated extensive research on the dynamical formation of such compact black hole binaries (BHBs). Recent studies have highlighted the potential role of tertiary-induced mergers via von Zeipel-Lidov-Kozai (ZLK) oscillations in generating the BHBs detected by collaborations like LIGO/VIRGO/KAGRA. I will discu...</p> DTSTART;TZID=Asia/Shanghai:20250313T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250313T140000Z LOCATION: SUMMARY:Binary around a BIG black hole v.s. Star around a BIG binary [EN] URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1461.htm END:VEVENT BEGIN:VEVENT UID:1759@kiaa.pku.edu.cn DTSTAMP:20250307T163401Z CREATED:20250307T163401Z DESCRIPTION:<p>GW observations are now revealing the population of black holes via the detection of binary black hole mergers, and the numbers are set to grow rapidly in the coming years: the distribution of astrophysical properties of binary black holes provides a key to interpret their formation channels. In this regard, scientists have proposed a variety of models for the black hole distribution, broadly c...</p> DTSTART;TZID=Asia/Shanghai:20250314T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250307T163401Z LOCATION: SUMMARY:Expect the unexpected – Augmented astrophysical models for black hole population studies URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1759.htm END:VEVENT BEGIN:VEVENT UID:1460@kiaa.pku.edu.cn DTSTAMP:20250320T140000Z CREATED:20250320T140000Z DESCRIPTION:<p>Host: Hui L</p> DTSTART;TZID=Asia/Shanghai:20250320T160000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250320T140000Z LOCATION: SUMMARY:双星理论与观测 URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1460.htm END:VEVENT BEGIN:VEVENT UID:1758@kiaa.pku.edu.cn DTSTAMP:20250319T131648Z CREATED:20250319T131648Z DESCRIPTION:<p>Using the data from the Spitzer Space Telescope in the Deep HSC fields, we have found a mysterious population of objects that are detected at SNR&gt;5 in the 3-5 micron (IRAC ch1 and ch2) but are either very red with Y-ch1&gt;3.5 or totally invisible in the much deeper optical. Their median magnitudes are 23.95 and 23.68 AB in ch1 and ch2, respectively; 6% of the objects are also detected in IRAC ch3...</p> DTSTART;TZID=Asia/Shanghai:20250321T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250319T131648Z LOCATION: SUMMARY:Revealing the nature of IRAC Optical Dropouts in the Deep HSC fields [EN] URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1758.htm END:VEVENT BEGIN:VEVENT UID:1459@kiaa.pku.edu.cn DTSTAMP:20250327T140000Z CREATED:20250327T140000Z DESCRIPTION:<p>The Imaging X-ray Polarimetry Explorer (IXPE) opens a new window to map magnetic fields in regions of freshly accelerated high-energy particles. By capturing the first spatially resolved X-ray polarization images of supernova remnants—including Cassiopeia A, Tycho, SN 1006, Vela Jr., RX J1713.7−3946, and RCW 86—IXPE probes the turbulent magnetic fields shaped by the Galaxy’s fastest shocks....</p> DTSTART;TZID=Asia/Shanghai:20250327T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250327T140000Z LOCATION: SUMMARY:X-ray polarization study of supernova remnants [EN] URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1459.htm END:VEVENT BEGIN:VEVENT UID:1757@kiaa.pku.edu.cn DTSTAMP:20250326T103624Z CREATED:20250326T103624Z DESCRIPTION:<p>The Sun Yat-sen University (SYSU) 80cm infrared telescope is designed for near-infrared time-domain observations. It’s primary scientific objectives include follow-up of transients such as supernovae, gamma-ray burst afterglows, tidal disruption events, and monitoring of brown dwarfs, AGNs and variable stars. The telescope has an 80cm diameter with f/8, and is capable of observing in J and K b...</p> DTSTART;TZID=Asia/Shanghai:20250328T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250326T103624Z LOCATION: SUMMARY:Design, Testing, and Commissioning of the Sun Yat-sen University 80 cm Infrared Telescope [EN] URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1072/1757.htm END:VEVENT BEGIN:VEVENT UID:1458@kiaa.pku.edu.cn DTSTAMP:20250403T140000Z CREATED:20250403T140000Z DESCRIPTION:<p>Since the discovery of the accelerated expansion of the universe in the 2000, dark matter and dark energy have been the main drivers of research in observational cosmology. At the same time, gravitational lensing, boosted by the Hubble Space Telescope observations, has become a key probe of the dark sector. In this talk, I will review this topic and focus on my research in Euclid and in DESI. I...</p> DTSTART;TZID=Asia/Shanghai:20250403T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250403T140000Z LOCATION: SUMMARY:Exploring the dark sector with gravitational lensing and wide field surveys in imaging and spectroscopy [EN] URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1458.htm END:VEVENT BEGIN:VEVENT UID:1457@kiaa.pku.edu.cn DTSTAMP:20250410T140000Z CREATED:20250410T140000Z DESCRIPTION:<p>拉索在银河系内发现了许多“拍电子伏加速器(PaVetron)”，其中的一部分以第一个黑洞PaVetron源表的形式发表，清楚显示出一个新的宇宙线源的“类”。最引人瞩目的是存在一个“超级-PaVetron”。还发现了一个近乎完美的黑洞+喷流的系统，让人类能够细致的研究黑洞吸积盘、喷流的产生等基本的物理问题。更重要的是我们发现，大约10个左右的源，将足以提供宇宙线“膝”及其以上的宇宙线的流量。拉索刚刚发表了质子在膝附近的能谱，...</p> DTSTART;TZID=Asia/Shanghai:20250410T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250410T140000Z LOCATION: SUMMARY:拉索发现黑洞是PeV宇宙线加速器 URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1457.htm END:VEVENT BEGIN:VEVENT UID:1646@kiaa.pku.edu.cn DTSTAMP:20250414T082504Z CREATED:20250414T082504Z DESCRIPTION:<p>通过联合宇宙微波背景和射电波段的观测可以揭示宇宙从早期到晚期不同阶段的演化历史。未来对宇宙微波背景偏振信号的高精度测量，将有助于探测由主要扰动及次级效应产生的新偏振信号，为早期宇宙物理机制及大尺度结构的形成与演化提供重要观测依据。同时，中性氢21厘米线信号可在不同红移和空间尺度上追踪暗物质主导的大尺度结构，为暗物质和暗能量的研究提供重要线索。宇宙微波背景与21厘米线信号在时间和空间尺度上的互补性，...</p> DTSTART;TZID=Asia/Shanghai:20250416T150000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250414T082504Z LOCATION: SUMMARY:基于宇宙微波背景与射电观测的宇宙学研究 URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1646.htm END:VEVENT BEGIN:VEVENT UID:1456@kiaa.pku.edu.cn DTSTAMP:20250414T083026Z CREATED:20250414T083026Z DESCRIPTION:<p>We will discuss the possibility that dark matter is composed of sufficiently light particles (such as axions) that it effectively behaves as a collection of waves. We will review the particle physics motivations and the&nbsp;rich wave phenomenology, and discuss the implications for astronomical observations and experimental detection.BIOHui Lam got his PhD from&nbsp;Massachusetts Institute of Technology....</p> DTSTART;TZID=Asia/Shanghai:20250417T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250414T083026Z LOCATION: SUMMARY:Wave dark matter URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1456.htm END:VEVENT BEGIN:VEVENT UID:1645@kiaa.pku.edu.cn DTSTAMP:20250414T084001Z CREATED:20250414T084001Z DESCRIPTION:<p>This presentation is divided into three main parts:Overview of Large-Scale Structure (LSS) Studies in CosmologyThis section introduces the theoretical framework behind the formation and evolution of large-scale structure, observations on LSS, statistical techniques used for LSS data analysis, and key phenomena (BAO, RSD and AP effect) associated with LSS.Introduction to 4MOST and the Cosmologic...</p> DTSTART;TZID=Asia/Shanghai:20250421T150000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250414T084001Z LOCATION: SUMMARY:Clustering analysis on 4MOST Cosmology Redshift survey URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1645.htm END:VEVENT BEGIN:VEVENT UID:1644@kiaa.pku.edu.cn DTSTAMP:20250414T084051Z CREATED:20250414T084051Z DESCRIPTION:<p>Several astrophysical and cosmological phenomena are consistent with the existence of a non-luminous, non-interacting “Dark Matter.” In this talk I describe efforts to detect Cold Dark Matter with particle experiments and the current limits. I then give an overview of the astrophysical constraints on Warm, Self-Interacting, and Fuzzy Dark Matter and a future outlook on Dark Matter searches.BI...</p> DTSTART;TZID=Asia/Shanghai:20250422T150000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250414T084051Z LOCATION: SUMMARY:Shedding light on the particle nature of dark matter URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1644.htm END:VEVENT BEGIN:VEVENT UID:1455@kiaa.pku.edu.cn DTSTAMP:20250414T084101Z CREATED:20250414T084101Z DESCRIPTION:<p>The interaction of galaxies is known to regulate the star-formation activities in the merging systems, or galaxy pairs, however, whether and how such interactions affect the central supermassive black hole, often manifested as active galactic nuclei---AGNs, is still under debate. Controversies exist as to whether AGN activities are enhanced or suppressed during the different merging phases. The...</p> DTSTART;TZID=Asia/Shanghai:20250424T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250414T084101Z LOCATION: SUMMARY:Active galactic nuclei and mergers in IR-bright galaxies URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1455.htm END:VEVENT BEGIN:VEVENT UID:1643@kiaa.pku.edu.cn DTSTAMP:20250414T084534Z CREATED:20250414T084534Z DESCRIPTION:<p>The X-ray-emitting hot gas is one of the primary components of the X-ray emission in normal galaxies and is crucial for understanding the evolution of the galactic ecosystem. The Virgo Cluster is the nearest and a rich galaxy cluster at its early evolutionary stage, which offers a great opportunity to study the hot gas content of its member galaxies and the cluster environmental effects. In thi...</p> DTSTART;TZID=Asia/Shanghai:20250428T120000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250414T084534Z LOCATION: SUMMARY:eROSITA Survey of the Hot Gaseous Halo of the Member Galaxies in Virgo URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1643.htm END:VEVENT BEGIN:VEVENT UID:1642@kiaa.pku.edu.cn DTSTAMP:20250414T085058Z CREATED:20250414T085058Z DESCRIPTION:<p>Integrated field unit (IFU) spectroscopy provides a unique window to explore gas-phase oxygen abundances in the interstellar medium (ISM) of galaxies in the local Universe. Two-point correlations are one of the next-generation methodologies proposed to extract new information on ISM diffusion from metal fields inside galaxies. I will present two-point correlation analyses using CALIFA and MUSE ...</p> DTSTART;TZID=Asia/Shanghai:20250507T150000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250414T085058Z LOCATION: SUMMARY:Metallicity Correlations in Galaxies URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1642.htm END:VEVENT BEGIN:VEVENT UID:1454@kiaa.pku.edu.cn DTSTAMP:20250414T085112Z CREATED:20250414T085112Z DESCRIPTION:<p>The discovery of thousands of exoplanets in our galaxy has unveiled an extraordinary diversity in planetary compositions and properties, challenging conventional theories of planet formation and evolution. These observations have spurred the development of new theoretical models that incorporate additional physical processes to bridge the gap between theory and data. Informed by recent high-pre...</p> DTSTART;TZID=Asia/Shanghai:20250508T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250414T085112Z LOCATION: SUMMARY:New Insights into Exoplanets: Connecting Theory with Measurements from Space and Lab URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1454.htm END:VEVENT BEGIN:VEVENT UID:1639@kiaa.pku.edu.cn DTSTAMP:20250512T104916Z CREATED:20250512T104916Z DESCRIPTION:<p>I will discuss the role of non-thermal pressure support as a major source of the difference between the hydrostatic and the total ``true&#39;&#39; halo mass in galaxy clusters. I will present new models and methods to constrain the non-thermal pressure, highlighting the role of the next generation of X-ray observatories, like XRISM and NewAthena, in constructing a consistent picture of the formation an...</p> DTSTART;TZID=Asia/Shanghai:20250514T133000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250512T104916Z LOCATION: SUMMARY:Non-thermal pressure in galaxy clusters: methods, models, constraints URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1639.htm END:VEVENT BEGIN:VEVENT UID:1453@kiaa.pku.edu.cn DTSTAMP:20250417T151439Z CREATED:20250417T151439Z DESCRIPTION:<p>GJ1214b is the archetype low-density sub-Neptune orbiting around a M-dwarf. The bulk composition of GJ1214b is of great interest to explore its origin; however, previous studies suffered from a degeneracy between a rocky core with a hydrogen-rich envelope or an icy core with a water-rich envelope. To break the degeneracy, atmospheric observations had been conducted for over a decade; however, t...</p> DTSTART;TZID=Asia/Shanghai:20250515T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250417T151439Z LOCATION: SUMMARY:A Possible Metal-dominated Atmosphere below the Thick Aerosols of GJ 1214 b Suggested by Its JWST Panchromatic Transmission Spectrum URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1453.htm END:VEVENT BEGIN:VEVENT UID:1640@kiaa.pku.edu.cn DTSTAMP:20250512T093017Z CREATED:20250512T093017Z DESCRIPTION:<p>Ultra-Diffuse Galaxies (UDGs) represent an extraordinary class of galaxies with effective radii comparable to the Milky Way yet stellar masses only 1/100 to 1/1000 of our Galaxy. Found in a variety of cosmic environments—from galaxy clusters and groups to large-scale filaments and cosmic voids—their origins remain a subject of intense debate, positioning them at the forefront of extragalactic...</p> DTSTART;TZID=Asia/Shanghai:20250516T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250512T093017Z LOCATION: SUMMARY:从小尺度到宇宙大尺度探索超弥散星系的形成机制 Unveiling the Formation Mechanisms of Ultra-Diffuse Galaxies: From Small Scale to Large Scale URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1640.htm END:VEVENT BEGIN:VEVENT UID:1452@kiaa.pku.edu.cn DTSTAMP:20250417T151454Z CREATED:20250417T151454Z DESCRIPTION:<p>Following the Big Bang the Universe was homogeneous in matter, energy and barren of chemistry. It is the stars which, through their life and death, built up the periodic table. Astronomers have now identified several classes of cosmic explosions of which supernovae constitute the largest group. The Palomar Transient Factory was an innovative 2-telescope, and its successor, the Zwicky Transient ...</p> DTSTART;TZID=Asia/Shanghai:20250522T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250417T151454Z LOCATION: SUMMARY:The Restless (the birth of the periodic table) URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1452.htm END:VEVENT BEGIN:VEVENT UID:1451@kiaa.pku.edu.cn DTSTAMP:20250417T151510Z CREATED:20250417T151510Z DESCRIPTION:<p>Compact objects, including white dwarfs, neutron stars, and black holes, serve as exceptional laboratories for probing fundamental physical processes under extreme conditions in the universe. Binary systems hosting these compact objects represent a crucial pathway for characterizing their properties and advancing our understanding of accretion physics and stellar evolution. While compact object...</p> DTSTART;TZID=Asia/Shanghai:20250529T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250417T151510Z LOCATION: SUMMARY:Exploring Compact Object Binaries via Optical Observations and Surveys URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1451.htm END:VEVENT BEGIN:VEVENT UID:1450@kiaa.pku.edu.cn DTSTAMP:20250417T151530Z CREATED:20250417T151530Z DESCRIPTION:<p>Ultra-hot Jupiter is a class of giant exoplanets with extremely high temperatures. Due to their unique chemical and physical properties, this class of exoplanet have become a popular research subject in recent years. In this talk, I will present observed results of ultra-hot Jupiters using both transmission and emission spectroscopy. We conducted a survey of a dozen ultra-hot Jupiters using gro...</p> DTSTART;TZID=Asia/Shanghai:20250605T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250417T151530Z LOCATION: SUMMARY:Ultra-hot Jupiter's atmosphere unveiled by high-resolution spectroscopy URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1450.htm END:VEVENT BEGIN:VEVENT UID:1896@kiaa.pku.edu.cn DTSTAMP:20250908T154906Z CREATED:20250908T154906Z DESCRIPTION:Visit Duration: 2025-6-9 to 2025-7-15Talk: Galaxy growth from the early universe to cosmic noo DTSTART;TZID=Asia/Shanghai:20250609T090000 DTEND;TZID=Asia/Shanghai:20250715T170000 LAST-MODIFIED:20250908T154906Z LOCATION: SUMMARY:Stjin Wuyts (Bath) URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1092/1896.htm END:VEVENT BEGIN:VEVENT UID:1894@kiaa.pku.edu.cn DTSTAMP:20250609T161646Z CREATED:20250609T161646Z DESCRIPTION: DTSTART;TZID=Asia/Shanghai:20250609T090000 DTEND;TZID=Asia/Shanghai:20250610T180000 LAST-MODIFIED:20250609T161646Z LOCATION: SUMMARY:ISSI-BJ银河系热重子巡天观测国际论坛 URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cnhttps://astro.tsinghua.edu.cn//info/1088/1996.htm END:VEVENT BEGIN:VEVENT UID:1635@kiaa.pku.edu.cn DTSTAMP:20250609T153528Z CREATED:20250609T153528Z DESCRIPTION:Advances in astrophysics are often data driven. Yet, large observing facilities capable of collecting the most sensitive data are expensive. Telescope time therefore constitutes a precious resource, part of which is allocated via an open and competitive process. In this session, I will share reflections on observing proposal writing, aimed primarily at junior scientists (PhDs, postdocs) who are... DTSTART;TZID=Asia/Shanghai:20250610T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250609T153528Z LOCATION: SUMMARY:Do's and don'ts of observing proposal writing URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1635.htm END:VEVENT BEGIN:VEVENT UID:1636@kiaa.pku.edu.cn DTSTAMP:20250609T132003Z CREATED:20250609T132003Z DESCRIPTION:The Universe started without the heavy elements that make the complexity of our surrounding world (e.g. carbon, oxygen). In this talk, I will showcase advances in the numerical modelling of how these chemical elements are produced in stars, how they are dispersed around young galaxies by energetic events, and how they get ionized to power the emission and absorption lines we observe in the spec... DTSTART;TZID=Asia/Shanghai:20250610T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250609T132003Z LOCATION: SUMMARY:New models to interpret near and far observations of the metal-poor Universe URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1636.htm END:VEVENT BEGIN:VEVENT UID:1641@kiaa.pku.edu.cn DTSTAMP:20250506T093007Z CREATED:20250506T093007Z DESCRIPTION:<p>The Local Group (LG), as a gravitationally bound system of the Milky Way and Andromeda, as well as their satellites, is a cornerstone of near-field cosmology. However, its utility as a cosmological probe requires understanding how it is related to the cosmic web. Using the ABACUSSUMMIT simulation, we identify LG analogues and quantify their environmental dependence. We find that the coupling en...</p> DTSTART;TZID=Asia/Shanghai:20250611T150000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250506T093007Z LOCATION: SUMMARY:Local Group Analogs in a cosmological context: Relating the velocity structure to the cosmic web URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1641.htm END:VEVENT BEGIN:VEVENT UID:1868@kiaa.pku.edu.cn DTSTAMP:20250612T171739Z CREATED:20250612T171739Z DESCRIPTION: DTSTART;TZID=Asia/Shanghai:20250612T090000 DTEND;TZID=Asia/Shanghai:20250615T170000 LAST-MODIFIED:20250612T171739Z LOCATION: SUMMARY:The 3rd HUBS workshop (2025) URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cnhttps://astro.tsinghua.edu.cn//info/1088/1999.htm END:VEVENT BEGIN:VEVENT UID:1637@kiaa.pku.edu.cn DTSTAMP:20250606T142136Z CREATED:20250606T142136Z DESCRIPTION:Blurred reflection features are commonly observed in the X-ray spectra of accreting black holes. In the presence of high-quality data and with the correct astrophysical model, X-ray reflection spectroscopy is a powerful tool to probe the strong gravity region of black holes, study the morphology of the accreting matter, measure black hole spins, and test Einstein&#39;s theory of General Relativity ... DTSTART;TZID=Asia/Shanghai:20250616T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250606T142136Z LOCATION: SUMMARY:Towards a new generation of reflection models for precision measurements of accreting black holes URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1637.htm END:VEVENT BEGIN:VEVENT UID:1893@kiaa.pku.edu.cn DTSTAMP:20250618T161005Z CREATED:20250618T161005Z DESCRIPTION: DTSTART;TZID=Asia/Shanghai:20250618T090000 DTEND;TZID=Asia/Shanghai:20250620T180000 LAST-MODIFIED:20250618T161005Z LOCATION: SUMMARY:“星系生态系统的百亿年演化规律”专题研讨会 URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cnhttps://astro.tsinghua.edu.cn//info/1088/2000.htm END:VEVENT BEGIN:VEVENT UID:1638@kiaa.pku.edu.cn DTSTAMP:20250512T110017Z CREATED:20250512T110017Z DESCRIPTION:<p>The hierarchical assembly of galaxies and dynamics in galactic nuclei naturally predict a significant population of off-nuclear massive black holes (MBHs), yet direct observational evidence remains scarce. The demographics of these off-nuclear MBHs offer critical insights into the formation of MBH mergers, the nature of ultra-compact dwarf galaxies, and the co-evolution of MBHs and their host g...</p> DTSTART;TZID=Asia/Shanghai:20250619T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250512T110017Z LOCATION: SUMMARY:Probing wandering black holes with off-nuclear tidal disruption events URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1638.htm END:VEVENT BEGIN:VEVENT UID:1892@kiaa.pku.edu.cn DTSTAMP:20250702T153953Z CREATED:20250702T153953Z DESCRIPTION: DTSTART;TZID=Asia/Shanghai:20250702T090000 DTEND;TZID=Asia/Shanghai:20250702T170000 LAST-MODIFIED:20250702T153953Z LOCATION: SUMMARY:银河系热重子探测DIXE科学研讨会 URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cnhttps://astro.tsinghua.edu.cn//info/1088/2009.htm END:VEVENT BEGIN:VEVENT UID:1633@kiaa.pku.edu.cn DTSTAMP:20250708T093040Z CREATED:20250708T093040Z DESCRIPTION:Over the past few years, JWST&#39;s exquisite sensitivity, wavelength coverage and resolution have dramatically advanced observational studies of distant galaxies. Ground-based facilities have added to this complementary views from wide-area imaging, integral-field spectroscopy and (sub)-mm probes. In this talk, I will share recent discoveries on rapidly maturing galaxies from the first billion yea... DTSTART;TZID=Asia/Shanghai:20250709T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250708T093040Z LOCATION: SUMMARY:Galaxy growth from the early universe to cosmic noon URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1633.htm END:VEVENT BEGIN:VEVENT UID:1634@kiaa.pku.edu.cn DTSTAMP:20250708T092420Z CREATED:20250708T092420Z DESCRIPTION:Massive black holes (MBHs) are found in the centres of most massive galaxies. When two galaxies merge, their respective MBHs are brought together, some of them will eventually coalesce and become powerful sources of gravitational waves (GWs). The detection of GWs from stellar-mass black hole binaries by the Laser Interferometer Gravitational-Wave Observatory (LIGO) marked the dawn of the GW ast... DTSTART;TZID=Asia/Shanghai:20250709T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250708T092420Z LOCATION: SUMMARY:The Population of LISA MBHBs: What we have learned from simulations URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1634.htm END:VEVENT BEGIN:VEVENT UID:1872@kiaa.pku.edu.cn DTSTAMP:20250815T102353Z CREATED:20250815T102353Z DESCRIPTION:Full-shape clustering measurements from DESI DR1 leverage information from the linear to quasi-nonlinear scales to deliver percent-level constraints on cosmological parameters. However, FS analyses relying on broad priors frequently suffer from projection effects, where marginalization over poorly constrained nuisance parameters can bias the inferred posteriors. To address this, we introduce ph... DTSTART;TZID=Asia/Shanghai:20250815T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250815T102353Z LOCATION: SUMMARY:DESI DR1 Full-Shape analysis: constraining cosmology and mitigating projection effects ​ URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1872.htm END:VEVENT BEGIN:VEVENT UID:1873@kiaa.pku.edu.cn DTSTAMP:20250815T102624Z CREATED:20250815T102624Z DESCRIPTION:The Baryon Acoustic Oscillations (BAO) is a powerful large-scale structure probe that is used to constrain dark energy models, and is the main goal of the latest large cosmology survey, eBOSS and Dark Energy Spectroscopic Instrument (DESI). I will present DESI second Data Release (DR2) cosmological results with a particular focus on the measurement of BAO from Lyman-α forest. We measure the is... DTSTART;TZID=Asia/Shanghai:20250818T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250815T102624Z LOCATION: SUMMARY:Cosmological Constraints from the Measurements of Baryon Acoustic Oscillations using Lyman alpha forests from DESI and CSST URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1873.htm END:VEVENT BEGIN:VEVENT UID:1874@kiaa.pku.edu.cn DTSTAMP:20250815T100047Z CREATED:20250815T100047Z DESCRIPTION:In this talk, I will present analysis of a spectroscopic sample of 23 broad-line AGNs (BLAGNs) at 3≲z≲6 selected using F322W2+F444W NIRCam/WFSS grism spectroscopy of the central 100 arcmin2 area of the NEXUS survey. Among these BLAGNs, 15 are classified as Little Red Dots (LRDs) based on their rest-frame UV-optical spectral slopes and compact morphology. The number density of LRDs is ∼1e-5 c... DTSTART;TZID=Asia/Shanghai:20250820T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250815T100047Z LOCATION: SUMMARY:NEXUS: A Spectroscopic Census of Broad-line AGNs and Little Red Dots at 3≲z≲6 URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1874.htm END:VEVENT BEGIN:VEVENT UID:1876@kiaa.pku.edu.cn DTSTAMP:20250818T115149Z CREATED:20250818T115149Z DESCRIPTION:Although the Moon today has no global magnetic field, paleomagnetic measurements of Apollo samples indicate the existence of an ancient field from at least 4.25 to 1.92 billion years ago. It has been proposed that the paleofield was generated by a core dynamo. However, the paleofield’s apparent high intensity and longevity are major challenges to current theory. Three key difficulties have bee... DTSTART;TZID=Asia/Shanghai:20250821T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250818T115149Z LOCATION: SUMMARY:What drove the lunar dynamo? URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1071/1876.htm END:VEVENT BEGIN:VEVENT UID:1877@kiaa.pku.edu.cn DTSTAMP:20250903T111555Z CREATED:20250903T111555Z DESCRIPTION:Strong gravitational lensing is a powerful tool for astrophysics and cosmology. I will present the Euclid Collaboration's current lens-finding efforts, including the "lens-finding engine" in Euclid's Quick Release 1, and the project I lead on double-source-plane lenses (DSPLs). DSPLs—systems with two Einstein rings at different source redshifts—are uniquely valuable for both cosmological dist... DTSTART;TZID=Asia/Shanghai:20250911T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250903T111555Z LOCATION: SUMMARY:Strong lensing studies with Euclid URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1877.htm END:VEVENT BEGIN:VEVENT UID:1897@kiaa.pku.edu.cn DTSTAMP:20250910T102109Z CREATED:20250910T102109Z DESCRIPTION:1）1982年我们把凝聚态物理学和粒子物理学相结合提出了中子星内中子超流涡旋运动发出的中微子回旋辐射作为长周期脉冲星自转减慢的一种新的可能机制。 2）我们利用中微子火箭喷流模型可以合理地解释天文观测发现的高匝速中子星现象。Host: Xinyu L DTSTART;TZID=Asia/Shanghai:20250911T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250910T102109Z LOCATION: SUMMARY:脉冲星自转减慢和高速中子星中子超流 ―涡旋体的中微子辐射及其效应 URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1897.htm END:VEVENT BEGIN:VEVENT UID:1898@kiaa.pku.edu.cn DTSTAMP:20250910T161100Z CREATED:20250910T161100Z DESCRIPTION:In this talk, I will summarize growing observational evidence from JWST that suggests accelerated structure formation in the early universe. Some are challenging canonical galaxy formation models in the standard LambdaCDM cosmology. I will begin by briefly reviewing potential resolutions to these tensions within the standard cosmological framework. Then I will focus on two extensions beyond the... DTSTART;TZID=Asia/Shanghai:20250911T150000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250910T161100Z LOCATION: SUMMARY:Cosmic Dawn as a portal to New Physics URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1898.htm END:VEVENT BEGIN:VEVENT UID:1899@kiaa.pku.edu.cn DTSTAMP:20250912T170624Z CREATED:20250912T170624Z DESCRIPTION:Dwarf galaxies serve as powerful probes of both the nature of dark matter and the effects of baryonic processes. Over the past two decades, observations of nearby dwarf galaxies have revealed tensions with predictions from simulations based on the standard ΛCDM cosmology. In this talk, I will present the Merian Survey, a medium-band imaging survey conducted with the Dark Energy Camera (DECam),... DTSTART;TZID=Asia/Shanghai:20250917T110000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250912T170624Z LOCATION: SUMMARY:Constraining halo properties of low-mass galaxies with large imaging and spectroscopic surveys URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1899.htm END:VEVENT BEGIN:VEVENT UID:1879@kiaa.pku.edu.cn DTSTAMP:20250904T133319Z CREATED:20250904T133319Z DESCRIPTION:The interstellar medium plays a central role in the galaxy evolution process; it is the reservoir that fuels galaxy growth via star formation, the repository of material formed by these stars, and a sensitive tracer of internal and external processes that affect entire galaxies (e.g. accretion and feedback). This overview talk will discuss how observations of the interstellar medium are sheddin... DTSTART;TZID=Asia/Shanghai:20250918T150000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250904T133319Z LOCATION: SUMMARY:From cosmic web to molecular clouds: the multiple scales of galaxy evolution URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1879.htm END:VEVENT BEGIN:VEVENT UID:1900@kiaa.pku.edu.cn DTSTAMP:20250922T094950Z CREATED:20250922T094950Z DESCRIPTION:The Dark Energy Spectroscopic Instrument (DESI) enables precision cosmology by mapping the large-scale distribution of galaxies with unprecedented detail. A central component of this effort is the full-shape analysis of galaxy clustering, which extracts information beyond the baryon acoustic oscillation (BAO) feature. In this talk, I will present the main scientific results from the DESI DR1 fu... DTSTART;TZID=Asia/Shanghai:20250924T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250922T094950Z LOCATION: SUMMARY:Full-shape Galaxy Clustering Analysis in the Era of Precision Cosmology: Lessons from DESI DR1 and Beyond URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1900.htm END:VEVENT BEGIN:VEVENT UID:1880@kiaa.pku.edu.cn DTSTAMP:20250904T133354Z CREATED:20250904T133354Z DESCRIPTION:It is hard to see a plane cruising at 10 km, as the plane is tiny and faint in the sky. But, if we can see the contrail trailing behind the plane, we know where the plane is. Now, astronomers are applying the same principle to study how planets form by detecting and characterizing the structures that baby planets produce in their birth cradles — protoplanetary disks. This is a new field largel... DTSTART;TZID=Asia/Shanghai:20250925T150000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250904T133354Z LOCATION: SUMMARY:Observational Planet Formation URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1880.htm END:VEVENT BEGIN:VEVENT UID:1881@kiaa.pku.edu.cn DTSTAMP:20250904T133546Z CREATED:20250904T133546Z DESCRIPTION:Large-scale structure has become a precision laboratory for testing gravity and dark energy. I will present recent results from our multi-tracer analyses of SDSS-IV/eBOSS luminous red and emission-line galaxies, using both configuration- and Fourier-space approaches. A key element is a “chained” multipole estimator that suppresses angular systematics, enabling robust use of auto- and cross-co... DTSTART;TZID=Asia/Shanghai:20251009T150000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250904T133546Z LOCATION: SUMMARY:Dark energy studies with massive galaxy surveys URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1881.htm END:VEVENT BEGIN:VEVENT UID:1901@kiaa.pku.edu.cn DTSTAMP:20250926T142514Z CREATED:20250926T142514Z DESCRIPTION:In 2000, cosmic shear, namely the gravitational lensing effect generated by the large-scale structure, was first measured by photometric galaxy surveys. Since then, it has been playing an increasingly important role in modern cosmology, providing tight constraints on the matter density parameter (Omega_m) and fluctuation amplitude parameter (S8). With the improvement in image quality, sky cover... DTSTART;TZID=Asia/Shanghai:20251011T133000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250926T142514Z LOCATION: SUMMARY:Cosmology with galaxy surveys: from cosmic shear to 6x2pt URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1901.htm END:VEVENT BEGIN:VEVENT UID:1882@kiaa.pku.edu.cn DTSTAMP:20250904T133727Z CREATED:20250904T133727Z DESCRIPTION:Muztag-Ata 1.93meter Synergy Telescope is general Optical telescope located at Pamir Plateau with Altitude of 4500m.It is constructed by Beijing Normal University, Xinjiang Observatory of CAS, Nanjing Institute of Astronomical Optics & Technology and Xinjiang University.Its instrumentation includes a three-color simultaneous photometer and a double spectrograph.It is a perfect telescope for tim... DTSTART;TZID=Asia/Shanghai:20251016T150000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250904T133727Z LOCATION: SUMMARY:Introduction of Muztag-Ata 1.93meter Synergy Telescope and Time-Delay Cosmography URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1882.htm END:VEVENT BEGIN:VEVENT UID:1903@kiaa.pku.edu.cn DTSTAMP:20251011T112148Z CREATED:20251011T112148Z DESCRIPTION:Magnetic fields in the interstellar medium (ISM) play a fundamental role in regulating star formation, guiding cosmic rays transport and acceleration, and shaping the Galactic foregrounds that limit precision in cosmology. Yet their 3D structure has remained elusive: most traditional methods measure only partial 2D information. In this talk, I will present new progress toward directly recoverin... DTSTART;TZID=Asia/Shanghai:20251017T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20251011T112148Z LOCATION: SUMMARY:3D magnetic fields in the interstellar medium URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1903.htm END:VEVENT BEGIN:VEVENT UID:1904@kiaa.pku.edu.cn DTSTAMP:20251014T092611Z CREATED:20251014T092611Z DESCRIPTION:The large-scale structures such as Fermi Bubbles and eROSITA Bubbles provide a unique opportunity to study our Milky Way. However, the nature and origin of these large structures are still under debate. In this talk, I will present the identification of several kpc-scale magnetized structures based on their polarized radio emission and their gamma-ray counterparts, which can be interpreted as t... DTSTART;TZID=Asia/Shanghai:20251017T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20251014T092611Z LOCATION: SUMMARY:Galactic magnetized halo related to the eROSITA Bubbles URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1904.htm END:VEVENT BEGIN:VEVENT UID:1907@kiaa.pku.edu.cn DTSTAMP:20251020T162405Z CREATED:20251020T162405Z DESCRIPTION:Visit Duration: 2025-10-21 to 2025-10-23Talk: LOFAR Surveys: A New Window on the Univers DTSTART;TZID=Asia/Shanghai:20251021T090000 DTEND;TZID=Asia/Shanghai:20251023T170000 LAST-MODIFIED:20251020T162405Z LOCATION: SUMMARY:Huub Röttgering (Leiden) URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1092/1907.htm END:VEVENT BEGIN:VEVENT UID:1906@kiaa.pku.edu.cn DTSTAMP:20251015T165224Z CREATED:20251015T165224Z DESCRIPTION:The Low-Frequency Array (LOFAR) is a pan-European radio telescope with immense data collection and processing capabilities, making it an unprecedented and powerful instrument for conducting the deepest and widest radio surveys at the lowest frequencies accessible from the ground. Over recent years, we have addressed key issues related to the analysis and calibration of radio data, allowing us t... DTSTART;TZID=Asia/Shanghai:20251021T150000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20251015T165224Z LOCATION: SUMMARY:LOFAR Surveys: A New Window on the Universe URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1071/1906.htm END:VEVENT BEGIN:VEVENT UID:1902@kiaa.pku.edu.cn DTSTAMP:20251011T111753Z CREATED:20251011T111753Z DESCRIPTION:COLIBRE is a new set of state-of-the-art cosmological hydrodynamical simulations of galaxy formation that self-consistently model the cold interstellar medium (ISM) and the dust therein. Previous large-volume simulations are often calibrated against low-redshift observational constraints, particularly the stellar mass function (SMF), which relies on a number of uncertain assumptions such as sta... DTSTART;TZID=Asia/Shanghai:20251022T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20251011T111753Z LOCATION: SUMMARY:Let COLIBRE Be Light: Luminosity Functions of the New State-of-the-Art COLIBRE Simulation URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1902.htm END:VEVENT BEGIN:VEVENT UID:1908@kiaa.pku.edu.cn DTSTAMP:20251020T162853Z CREATED:20251020T162853Z DESCRIPTION:Visit Duration: 2025-10-22 to 2025-10-24Talk: Metal transport in the interstellar and circumgalactic mediu DTSTART;TZID=Asia/Shanghai:20251022T140000 DTEND;TZID=Asia/Shanghai:20251024T170000 LAST-MODIFIED:20251020T162853Z LOCATION: SUMMARY:Mark Krumholz (ANU) URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1092/1908.htm END:VEVENT BEGIN:VEVENT UID:1905@kiaa.pku.edu.cn DTSTAMP:20251015T105515Z CREATED:20251015T105515Z DESCRIPTION:稀释制冷机是一种能够连续产生10 mK极低温度的制冷系统，广泛应用于凝聚态物理、天文探测和量子计算等领域。本报告将介绍团队在全国产化10 mK脉冲管预冷稀释制冷机的最新进展。首先将介绍全国产化的4 K脉冲管制冷机，其制冷功率为1.4 W @4.2 K，40 W @45 K，最低温度可降至2.15 K，非常适合用于液化3He，并介绍其在1K制冷机中的应用。其次将介绍团队研发的新型同轴对流热开关、以及新型气隙热开关，最大开关比可达1000。最后针... DTSTART;TZID=Asia/Shanghai:20251023T110000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20251015T105515Z LOCATION: SUMMARY:稀释制冷机及其关键技术研究进展 URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1905.htm END:VEVENT BEGIN:VEVENT UID:1883@kiaa.pku.edu.cn DTSTAMP:20250904T133846Z CREATED:20250904T133846Z DESCRIPTION:Observations over the past decade have revealed that galaxies lose many of the metals they produce to the circumgalactic medium, and that the metals they retain are arranged in complex patterns that go beyond simple radial gradients. Theoretical models for how metals move through and out of the interstellar medium to produce these distributions are still in their infancy. In this talk, I discus... DTSTART;TZID=Asia/Shanghai:20251023T150000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250904T133846Z LOCATION: SUMMARY:Metal transport in the interstellar and circumgalactic medium URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1883.htm END:VEVENT BEGIN:VEVENT UID:1910@kiaa.pku.edu.cn DTSTAMP:20251024T151250Z CREATED:20251024T151250Z DESCRIPTION:This talk outlines the personal story of my long career in pulsar research. It began shortly before publication of the first pulsar discovery by Antony Hewish, Jocelyn Bell, et al. In 1968, and is still continuing. I have been involved in many aspects of pulsar research over the years. This talk emphasizes my role in the development of new receiver systems for the Parkes 64m radio telescope in ... DTSTART;TZID=Asia/Shanghai:20251027T103000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20251024T151250Z LOCATION: SUMMARY:57 Years of Pulsar Research URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1071/1910.htm END:VEVENT BEGIN:VEVENT UID:1909@kiaa.pku.edu.cn DTSTAMP:20251024T140203Z CREATED:20251024T140203Z DESCRIPTION:Structures such as gaps and rings in ALMA observations of protoplanetary disks have long been hailed as signposts of planet formation. However, it is still not clear how common such substructures are, when they become apparent in disks and how they are linked to the formation of planets. In this talk I will describe the latest insights on the commonality and evolution of substructures in disks,... DTSTART;TZID=Asia/Shanghai:20251027T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20251024T140203Z LOCATION: SUMMARY:Connecting protoplanetary disk observations with planet formation modeling URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1071/1909.htm END:VEVENT BEGIN:VEVENT UID:1911@kiaa.pku.edu.cn DTSTAMP:20251027T093201Z CREATED:20251027T093201Z DESCRIPTION:I will report the solution to a puzzle of more than 40 years' standing: Why is the lower limit on the mass of the Local Group of galaxies inferred from the Timing Argument of Kahn & Woltjer (1959), larger than the upper limit implied by the almost unperturbed Hubble flow which Sandage (1986) measured for nearby galaxies.BIOProf. Simon D. M. White is the Emeritus Director at the Max-Planck-Insti... DTSTART;TZID=Asia/Shanghai:20251028T150000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20251027T093201Z LOCATION: SUMMARY:A puzzle solved: the world is flat URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1071/1911.htm END:VEVENT BEGIN:VEVENT UID:1884@kiaa.pku.edu.cn DTSTAMP:20250904T134011Z CREATED:20250904T134011Z DESCRIPTION:During the 14 billion year journey from the last scattering surface to the Earth, cosmic microwave background (CMB) photons were deflected (CMB lensing), stretched (the ISW effect) and scattered (the Sunyaev Zel’dovich effect and patchy screening). The induced secondary CMB anisotropies contain invaluable information on missing baryons, dark matter, dark energy, gravity, and the origin mechani... DTSTART;TZID=Asia/Shanghai:20251030T150000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250904T134011Z LOCATION: SUMMARY:Seeing the Missing Worlds Using CMB as a Backlight 宇宙微光中的隐匿世界 URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1884.htm END:VEVENT BEGIN:VEVENT UID:1885@kiaa.pku.edu.cn DTSTAMP:20250904T134203Z CREATED:20250904T134203Z DESCRIPTION:Quasi-periodic eruptions (QPEs) are intense repeating soft X-ray bursts with recurrence times about a few hours to a few weeks from galactic nuclei. More and more observations show that QPEs are associated with tidal disruption events (TDEs), especially TDEs in recently faded active galactic nucleis (AGNs). The intriguing timing pattern of QPEs indicates that (at least a fraction of) QPEs are t... DTSTART;TZID=Asia/Shanghai:20251106T150000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250904T134203Z LOCATION: SUMMARY:Quasi-Periodic Eruptions: observation, origin and applications URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1885.htm END:VEVENT BEGIN:VEVENT UID:1921@kiaa.pku.edu.cn DTSTAMP:20251031T150651Z CREATED:20251031T150651Z DESCRIPTION:Core-collapse supernovae (CCSNe) are spectacular explosions of dying massive stars and play significant roles in various astrophysical processes. It is a key topic, and still a major difficulty, to determine the progenitors of different types of CCSNe. In this talk, I will describe the general understanding on this topic from past studies and introduce our recent work in this field on a wide ra... DTSTART;TZID=Asia/Shanghai:20251107T140000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20251031T150651Z LOCATION: SUMMARY:New Insights into the Progenitors of Core-Collapse Supernovae URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1921.htm END:VEVENT BEGIN:VEVENT UID:1886@kiaa.pku.edu.cn DTSTAMP:20250904T134259Z CREATED:20250904T134259Z DESCRIPTION:M87, the nearest radio galaxy hosting a supermassive black hole of six billion solar masses, offers a unique laboratory for probing black hole accretion and jet-launching mechanisms. Over the past two decades, high-resolution observations at multiple spatial scales have revealed striking structural variations in its jet and accretion system. By linking these variations across microarcsecond to ... DTSTART;TZID=Asia/Shanghai:20251113T150000 DTEND;TZID=Asia/Shanghai: LAST-MODIFIED:20250904T134259Z LOCATION: SUMMARY:Unveiling the Dynamic Heart of M87: Structural Variations Across Multiple Scales URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1886.htm END:VEVENT BEGIN:VEVENT UID:1923@kiaa.pku.edu.cn DTSTAMP:20251107T141219Z CREATED:20251107T141219Z DESCRIPTION:Blue Skies Space is a space science data company which has developed an innovative model for science satellites, leveraging recent advancements in space technology and the rapidly evolving global scientific landscape, enabling drastically reduced satellite development timescales and costs. Our vision is to accelerate and expand the availability of new datasets to researchers worldwide, compleme... DTSTART;TZID=Asia/Shanghai:20251119T140000 DTEND;TZID=Asia/Shanghai:20251119T150000 LAST-MODIFIED:20251107T141219Z LOCATION: SUMMARY:Mauve: A UV-Visible spectrophotometry satellite URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1096/1923.htm END:VEVENT BEGIN:VEVENT UID:1950@kiaa.pku.edu.cn DTSTAMP:20251107T142725Z CREATED:20251107T142725Z DESCRIPTION:The centers of all nearby massive galaxies contain supermassive black holes weighing millions to tens of billions times the mass of the Sun. Even many local low-mass galaxies contain intermediate-mass black holes, a population critical for predictions of next-generation gravitational wave experiments. Recent observations with JWST have discovered a remarkably abundant population of supermassive... DTSTART;TZID=Asia/Shanghai:20251119T190000 DTEND;TZID=Asia/Shanghai:20251119T203000 LAST-MODIFIED:20251107T142725Z LOCATION: SUMMARY:《天问》天文系列公众讲座 第二讲：宇宙时空中的超大质量黑洞 URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1097/1950.htm END:VEVENT BEGIN:VEVENT UID:1887@kiaa.pku.edu.cn DTSTAMP:20250904T134511Z CREATED:20250904T134511Z DESCRIPTION:The discovery of the "little red dots" (LRDs) with the James Webb Space Telescope has revealed a host of surprises about this mysterious class of high-redshift objects. Their physical nature remains hotly contested. I will argue that LRDs trace the initial phase of supermassive black holes that predates the formation of their host galaxies. As such, they offer a uniquely valuable laboratory to ... DTSTART;TZID=Asia/Shanghai:20251120T140000 DTEND;TZID=Asia/Shanghai:20251120T153000 LAST-MODIFIED:20250904T134511Z LOCATION: SUMMARY:Little Red Dots: A New Laboratory for Black Hole and Galaxy Formation URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1887.htm END:VEVENT BEGIN:VEVENT UID:1922@kiaa.pku.edu.cn DTSTAMP:20251104T143255Z CREATED:20251104T143255Z DESCRIPTION:SQ-A is a starburst in the intra-group medium (IGrM) of the famous compact group Stephan's Quintet (SQ). There has been a long controversy on whether SQ-A is triggered by a collision of two gas systems, one is associated with the IGrM (v~6900 km/s) and another with the intruder galaxy NGC 7318b (v~6000 km/s). The counter argument against the collisional scenario is based on the fact that in a l... DTSTART;TZID=Asia/Shanghai:20251125T103000 DTEND;TZID=Asia/Shanghai:20251125T113000 LAST-MODIFIED:20251104T143255Z LOCATION: SUMMARY:SQ-A: A Collision Triggered Starburst in Intra-Group Medium of Stephan's Quintet URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1071/1922.htm END:VEVENT BEGIN:VEVENT UID:1953@kiaa.pku.edu.cn DTSTAMP:20251121T142258Z CREATED:20251121T142258Z DESCRIPTION:Planet formation is far from understood. Observations of Free Floating Planets (FFPs), on the one hand, and of planets in tight stellar binaries, on the other, are challenging our leading (Core Accretion) scenario for planet formation strongly. This classical framework requires a prolonged epoch of gentle accumulation of small solids into ever larger bodies, yet both FFPs and planets in binarie... DTSTART;TZID=Asia/Shanghai:20251126T140000 DTEND;TZID=Asia/Shanghai:20251126T150000 LAST-MODIFIED:20251121T142258Z LOCATION: SUMMARY:Free Floating Planets and stellar binary formation URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1071/1953.htm END:VEVENT BEGIN:VEVENT UID:1954@kiaa.pku.edu.cn DTSTAMP:20251124T110715Z CREATED:20251124T110715Z DESCRIPTION:Recent observational campaigns and theoretical investigations  strongly indicate the presence ofa spinning supermassive black hole binary that spirals in due to the emission ofnano-Hertz gravitational waves in bright blazar OJ 287.I will briefly describe these efforts while focusingon our August 2019 observations and their implications.Additionally, I will touch upon  our ongoing efforts, relev... DTSTART;TZID=Asia/Shanghai:20251127T110000 DTEND;TZID=Asia/Shanghai:20251127T120000 LAST-MODIFIED:20251124T110715Z LOCATION: SUMMARY:OJ 287: The Rosetta Stone of Supermassive Black-Hole Binaries URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1954.htm END:VEVENT BEGIN:VEVENT UID:1952@kiaa.pku.edu.cn DTSTAMP:20251120T150732Z CREATED:20251120T150732Z DESCRIPTION:Icy moon oceans are promising targets in the search for extraterrestrial life, but characterizing their internal dynamics remains challenging, as most oceanic processes are obscured from direct observation by the overlying ice shell. In contrast, the ice shell itself is relatively accessible to observation and may serve as a window into the ocean below. As the only liquid layer in the system, t... DTSTART;TZID=Asia/Shanghai:20251127T150000 DTEND;TZID=Asia/Shanghai:20251127T160000 LAST-MODIFIED:20251120T150732Z LOCATION: SUMMARY:Icy ocean worlds -- from the surface to the interior URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1952.htm END:VEVENT BEGIN:VEVENT UID:1958@kiaa.pku.edu.cn DTSTAMP:20251202T124254Z CREATED:20251202T124254Z DESCRIPTION:We try to find an optimized methodology to constrain the cosmological parameters using the quasar dataset. Quasars can be the potential cosmic probe that can fill up the gap between the farthest observed Type Ia Supernovae and the Cosmic Microwave Background CMB. Quasars can be observed to the highest redshift of z ≈ 7.1. It can give valuable insight into the tensions of the cosmological param... DTSTART;TZID=Asia/Shanghai:20251203T110000 DTEND;TZID=Asia/Shanghai:20251203T120000 LAST-MODIFIED:20251202T124254Z LOCATION: SUMMARY:The use of the quasar dataset on Cosmology: consequences and prospects URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1958.htm END:VEVENT BEGIN:VEVENT UID:1956@kiaa.pku.edu.cn DTSTAMP:20251201T102101Z CREATED:20251201T102101Z DESCRIPTION:Euclid is a class-M space mission by ESA launched in July 2023. In the course of its six years lifetime, it will observ ~14,000 sq. degrees of the extragalactic sky with the aim of understanding the nature of dark matter and dark energy combining multiple cosmological probes such as weak lensing and galaxy clusters. Being designed for accurate shape measurements from space and having a space re... DTSTART;TZID=Asia/Shanghai:20251203T150000 DTEND;TZID=Asia/Shanghai:20251203T160000 LAST-MODIFIED:20251201T102101Z LOCATION: SUMMARY:Hunting for strong gravitational lenses with Euclid URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1956.htm END:VEVENT BEGIN:VEVENT UID:1888@kiaa.pku.edu.cn DTSTAMP:20250904T135025Z CREATED:20250904T135025Z DESCRIPTION:The detection of the first hot Jupiter around a main sequence star 30 years ago has opened the question about the origin of these planets. Considering that these planets accrete their gaseous envelope in the protoplanetary disc they are born in, it makes sense to relate the formation location of these planets to the chemical composition of the disc. In particular, the idea to related the atmosp... DTSTART;TZID=Asia/Shanghai:20251204T150000 DTEND;TZID=Asia/Shanghai:20251204T160000 LAST-MODIFIED:20250904T135025Z LOCATION: SUMMARY:Where do giant planets originate from? URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1888.htm END:VEVENT BEGIN:VEVENT UID:1959@kiaa.pku.edu.cn DTSTAMP:20251202T154533Z CREATED:20251202T154533Z DESCRIPTION:The origin of cosmic rays (CRs) remains an open question. The CR spectrum is characterized by two significant breaks: the knee at ~3 PeV (PeV=1e15 eV) and the ankle at ~3 EeV (EeV=1e18 eV). It is widely accepted that ultra-high-energy cosmic rays (UHECRs) above the ankle originate from extragalactic sources, with the transition energy between galactic and extragalactic components lying between ... DTSTART;TZID=Asia/Shanghai:20251208T110000 DTEND;TZID=Asia/Shanghai:20251208T120000 LAST-MODIFIED:20251202T154533Z LOCATION: SUMMARY:Particle acceleration and emission in jets of microquasars and active galactic nuclei URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1959.htm END:VEVENT BEGIN:VEVENT UID:1957@kiaa.pku.edu.cn DTSTAMP:20251201T112559Z CREATED:20251201T112559Z DESCRIPTION:This is the abstract: Understanding how galaxies form and evolve remains one of the central challenges in modern astrophysics. In this talk, I will present my research over the past decade on the multi-scale processes that govern galaxy formation, from the initial conditions imprinted in the cosmic microwave background to the assembly of galactic disks.I will show that the effect of the cosmic ... DTSTART;TZID=Asia/Shanghai:20251208T150000 DTEND;TZID=Asia/Shanghai:20251208T160000 LAST-MODIFIED:20251201T112559Z LOCATION: SUMMARY:Tracing Cosmic Evolution: From the CMB to the Web, the CGM, and Galactic Disks URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1957.htm END:VEVENT BEGIN:VEVENT UID:1889@kiaa.pku.edu.cn DTSTAMP:20250904T140329Z CREATED:20250904T140329Z DESCRIPTION:本报告将介绍国际暗能量研究的最新进展，介绍暗能量理论模型，特别是描述状态方程越过 宇宙学常数线的Quintom 理论的发展历史和研究现状; 介绍我国阿里原初引力波探测实验（AliCPT）的现状和下一步规划及预期科学目标; 介绍AliCPT 探测暗能量动力学机制的可能性。报告人简介张新民 研究员，阿里原初引力波探测实验首席科学家/AliCPT国际合作组发言人。1991年美国洛杉矶加州大学（UCLA）研究生毕业获博士学位，1996年回国在高能... DTSTART;TZID=Asia/Shanghai:20251211T150000 DTEND;TZID=Asia/Shanghai:20251211T160000 LAST-MODIFIED:20250904T140329Z LOCATION: SUMMARY:动力学暗能量与原初引力波探测新进展 URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1889.htm END:VEVENT BEGIN:VEVENT UID:1960@kiaa.pku.edu.cn DTSTAMP:20251208T145155Z CREATED:20251208T145155Z DESCRIPTION:Black holes have become unique tools in the understanding of a plethora of phenomena in vastly different fronts. From understanding spectacularly energetic events in our universe, from gaining insights on potential new particles to unraveling seemingly unrelated phenomena through a firm grasp of their dynamics is key. In this talk, we will connect with several of these fronts highlighting some ... DTSTART;TZID=Asia/Shanghai:20251215T140000 DTEND;TZID=Asia/Shanghai:20251215T150000 LAST-MODIFIED:20251208T145155Z LOCATION: SUMMARY:Plowing for physics with black holes​ URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1071/1960.htm END:VEVENT BEGIN:VEVENT UID:1961@kiaa.pku.edu.cn DTSTAMP:20251209T114502Z CREATED:20251209T114502Z DESCRIPTION:Most exoplanets likely begin life wrapped in hydrogen–helium envelopes that interact intensely with their molten or supercritical interiors for millions to billions of years. Yet, despite their pivotal role in shaping planetary formation, evolution, and atmospheric composition, our fundamental physical and chemical understanding of these interactions remains limited, in large part because they... DTSTART;TZID=Asia/Shanghai:20251215T150000 DTEND;TZID=Asia/Shanghai:20251215T160000 LAST-MODIFIED:20251209T114502Z LOCATION: SUMMARY:Connecting the Dots: From Electrons to Planets URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1961.htm END:VEVENT BEGIN:VEVENT UID:1962@kiaa.pku.edu.cn DTSTAMP:20251211T101821Z CREATED:20251211T101821Z DESCRIPTION:Processes operating in the outer layers of the Sun’s atmosphere, the fully ionised, magnetically dominated plasma of the corona, remain one of the major unsolved puzzles in solar physics. Intensively debated research topics include the enigmatic problem of coronal heating; the rapid release of enormous amounts of magnetic energy in solar flares and coronal mass ejections; the microphysical mec... DTSTART;TZID=Asia/Shanghai:20251216T133000 DTEND;TZID=Asia/Shanghai:20251216T143000 LAST-MODIFIED:20251211T101821Z LOCATION: SUMMARY:Magnetohydrodynamic Seismology of the Corona of the Sun URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1071/1962.htm END:VEVENT BEGIN:VEVENT UID:1890@kiaa.pku.edu.cn DTSTAMP:20250904T140437Z CREATED:20250904T140437Z DESCRIPTION:Thirty years after the discovery of an exoplanet orbiting a Sun-like star, we have confirmed over 6,000 exoplanets. However, the existence of a Solar System analog – let alone an exo-Earth – remains elusive. This gap in our knowledge reflects not the uniqueness of our home, but the technical challenge of directly detecting habitable worlds around Sun-like stars. High-contrast imaging, enabled... DTSTART;TZID=Asia/Shanghai:20251218T150000 DTEND;TZID=Asia/Shanghai:20251218T160000 LAST-MODIFIED:20250904T140437Z LOCATION: SUMMARY:Coronagraphs: From Proving Einstein to Imaging Exoplanetary/Extragalactic Systems URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1890.htm END:VEVENT BEGIN:VEVENT UID:1972@kiaa.pku.edu.cn DTSTAMP:20251215T104721Z CREATED:20251215T104721Z DESCRIPTION:With the ever-increasing census of protoplanetary disks observed in mm emission, disk population synthesis studies have become an important tool to constrain expected disk properties and the occurrence of sub-structures. Previous studies have revealed that the observed spectral indices are consistent with ubiquitous substructures emerging at early times. However, it still remains challenging to... DTSTART;TZID=Asia/Shanghai:20251219T100000 DTEND;TZID=Asia/Shanghai:20251219T110000 LAST-MODIFIED:20251215T104721Z LOCATION: SUMMARY:Disk Population Synthesis of structured disks with external photoevaporation URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1972.htm END:VEVENT BEGIN:VEVENT UID:1973@kiaa.pku.edu.cn DTSTAMP:20251216T143224Z CREATED:20251216T143224Z DESCRIPTION:随着量子技术的兴起以及天文观测等前沿研究的进一步深入，对于极低温技术的需求愈加旺盛。目前主要应用集中在20mK-300mK制冷温区，冷量大小在数μW至数百μW量级。主流的极低温制冷机包括吸附制冷机（250mK-1K）、绝热去磁制冷机(>30mK)以及稀释制冷机（>5mK）。本报告主要介绍三种极低温制冷技术以及近年来相关领域的代表性进展，同时介绍极低温技术的典型应用，并对未来技术发展趋势做一些初步探讨。报告人简介：戴巍，中国科... DTSTART;TZID=Asia/Shanghai:20251219T133000 DTEND;TZID=Asia/Shanghai:20251219T150000 LAST-MODIFIED:20251216T143224Z LOCATION: SUMMARY:主流极低温制冷技术及其典型应用 URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1973.htm END:VEVENT BEGIN:VEVENT UID:1971@kiaa.pku.edu.cn DTSTAMP:20251215T104202Z CREATED:20251215T104202Z DESCRIPTION:The measurements of the cosmic microwave background radiation is the pillar of modern precision cosmology. In this talk, I will give a brief overview of the experimental evolution of the cosmic microwave background radiation and highlight its phenomenal success and distinctive challenges. I will also discuss the current outstanding questions in modern cosmology and the prospects of the emergenc... DTSTART;TZID=Asia/Shanghai:20251219T140000 DTEND;TZID=Asia/Shanghai:20251219T150000 LAST-MODIFIED:20251215T104202Z LOCATION: SUMMARY:The 60 years of cosmic microwave background radiation (1965-2025): where new physics may emerge? URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1971.htm END:VEVENT BEGIN:VEVENT UID:1955@kiaa.pku.edu.cn DTSTAMP:20251128T103715Z CREATED:20251128T103715Z DESCRIPTION:Dark energy has attracted renewed attention since DESI reported a possible dynamical behavior crossing the cosmological constant boundary, favoring the (w0,wa) parametrization over a cosmological constant at more than 3\sigma. This apparent evolution is a manifestation of some discrepancies between DESI BAO, Planck CMB and supernovae measurements. An independent probe from DESI and SN is theref... DTSTART;TZID=Asia/Shanghai:20251223T140000 DTEND;TZID=Asia/Shanghai:20251223T150000 LAST-MODIFIED:20251128T103715Z LOCATION: SUMMARY:A new multiprobe analysis of modified gravity and evolving dark energy URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1955.htm END:VEVENT BEGIN:VEVENT UID:1974@kiaa.pku.edu.cn DTSTAMP:20251219T165330Z CREATED:20251219T165330Z DESCRIPTION:Notoriously difficult to constrain with observations and physically intricate to model in simulations, the non-thermal physics of cosmic rays (CRs) and magnetic fields (B-fields), and their effects on galaxies, remain mostly elusive. The study of these processes is timely and scientifically exigent. Current simulations are able to evolve CRs with magnetic fields in tandem with feedback from sta... DTSTART;TZID=Asia/Shanghai:20251223T153000 DTEND;TZID=Asia/Shanghai:20251223T163000 LAST-MODIFIED:20251219T165330Z LOCATION: SUMMARY:The non-thermal physics of cosmic rays and magnetic fields in galaxy formation and evolution URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1974.htm END:VEVENT BEGIN:VEVENT UID:1891@kiaa.pku.edu.cn DTSTAMP:20250904T140758Z CREATED:20250904T140758Z DESCRIPTION:近年来，多个历史性多波段成协事件的观测为高能暂现源的研究提供了重要突破。例如，GRB 170817A与引力波信号的成协，不仅证实了双致密星并合事件，还为引力波天文学的发展奠定了基础。XRB 200428与快速射电暴的成协揭示了磁星是部分FRB的起源。这些重要事件的成协证认及后续的数据分析和科学研究，首先依赖于对其准确定位，因此我们提出了改进的多卫星联合定位方法。我们还对这些爆发进行了准周期、谱延迟、最小光变时标、引力... DTSTART;TZID=Asia/Shanghai:20251225T150000 DTEND;TZID=Asia/Shanghai:20251225T160000 LAST-MODIFIED:20250904T140758Z LOCATION: SUMMARY:从高能暂现源的观测、研究到应用 URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1891.htm END:VEVENT BEGIN:VEVENT UID:1975@kiaa.pku.edu.cn DTSTAMP:20251226T170318Z CREATED:20251226T170318Z DESCRIPTION:Active galactic nuclei (AGN) are powered by accretion onto supermassive black holes (SMBHs) and play a central role in galaxy evolution by tracing SMBH growth across cosmic time. As some of the most luminous objects in the Universe, AGN provide unique laboratories for studying accretion physics and relativistic processes in extreme environments. However, the extremely small physical scales of t... DTSTART;TZID=Asia/Shanghai:20260105T093000 DTEND;TZID=Asia/Shanghai:20260105T103000 LAST-MODIFIED:20251226T170318Z LOCATION: SUMMARY:An X-ray View of Active Galactic Nuclei URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1975.htm END:VEVENT BEGIN:VEVENT UID:1981@kiaa.pku.edu.cn DTSTAMP:20260105T163232Z CREATED:20260105T163232Z DESCRIPTION:the past two decades, large-scale numerical simulations on parallel CPU clusters have been crucial for our theoretical understanding of star formation and stellar feedback. As modern supercomputers increasingly pivot toward GPU-dominated architectures, it has become essential to redesign our simulation tools to this new architecture in order to scale up these simulations. In this talk, I will g... DTSTART;TZID=Asia/Shanghai:20260106T100000 DTEND;TZID=Asia/Shanghai:20260106T110000 LAST-MODIFIED:20260105T163232Z LOCATION: SUMMARY:CPUs to GPUs: Transforming Star Formation Simulations with QUOKKA URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1981.htm END:VEVENT BEGIN:VEVENT UID:1977@kiaa.pku.edu.cn DTSTAMP:20251230T141037Z CREATED:20251230T141037Z DESCRIPTION:I will show that the low-mass stellar mass function in the Milky Way halo using a clean sample of metal-poor main-sequence stars from Gaia DR3 BP/RP (XP) spectra within 1 kpc. Combining probabilistic kinematic halo selection with XP-based [Fe/H] calibrated to SDSS-V/APOGEE, and a forward model with effective volumes, we find that below 0.5 solar mass the halo MF changes strongly with metallicit... DTSTART;TZID=Asia/Shanghai:20260107T100000 DTEND;TZID=Asia/Shanghai:20260107T110000 LAST-MODIFIED:20251230T141037Z LOCATION: SUMMARY:Variations of the Stellar Mass Function in the Milky Way Halo URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1977.htm END:VEVENT BEGIN:VEVENT UID:1976@kiaa.pku.edu.cn DTSTAMP:20251229T133333Z CREATED:20251229T133333Z DESCRIPTION:The Dark Energy Spectroscopic Instrument (DESI) has constructed the largest 3D map of galaxies and quasars to date, spanning the nearby Universe to a redshift of over 3. Recently, DESI has released cosmological measurements from its third-year (Y3) data, revealing evidences of dynamic dark energy. In this talk, I will review the DESI results, discuss potential problems and future developments.H... DTSTART;TZID=Asia/Shanghai:20260107T140000 DTEND;TZID=Asia/Shanghai:20260107T150000 LAST-MODIFIED:20251229T133333Z LOCATION: SUMMARY:DESI cosmology review URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1976.htm END:VEVENT BEGIN:VEVENT UID:1978@kiaa.pku.edu.cn DTSTAMP:20251230T141428Z CREATED:20251230T141428Z DESCRIPTION:The James Webb Space Telescope (JWST) has transformed our view of galaxy formation in the early Universe. One of its most powerful capabilities is NIRCam wide-field slitless spectroscopy (WFSS). Originally designed as an engineering mode, NIRCam WFSS has evolved into a discovery machine that delivers tens of thousands of spectroscopic redshifts from z=0 to 9. This provides a highly complete and... DTSTART;TZID=Asia/Shanghai:20260108T093000 DTEND;TZID=Asia/Shanghai:20260108T103000 LAST-MODIFIED:20251230T141428Z LOCATION: SUMMARY:A New Era in Extragalactic Astrophysics with JWST NIRCam Wide Field Slitless Spectroscopy URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1978.htm END:VEVENT BEGIN:VEVENT UID:1979@kiaa.pku.edu.cn DTSTAMP:20251230T141920Z CREATED:20251230T141920Z DESCRIPTION:Since 2010, pioneering time-domain photometric missions (CoRoT, Kepler, and TESS) together with extreme-precision radial-velocity instruments (VLT/ESPRESSO and Keck/KPF), have revealed a rich spectrum of low-amplitude stellar variability driven by rotation, convection, and oscillations. Among these phenomena, stellar oscillations provide a powerful probe of stellar interiors, enabling unique in... DTSTART;TZID=Asia/Shanghai:20260112T093000 DTEND;TZID=Asia/Shanghai:20260112T103000 LAST-MODIFIED:20251230T141920Z LOCATION: SUMMARY:Probing Stellar Interiors in the Golden Era of Precision Stellar Astrophysics URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1979.htm END:VEVENT BEGIN:VEVENT UID:1980@kiaa.pku.edu.cn DTSTAMP:20251231T094815Z CREATED:20251231T094815Z DESCRIPTION:Observational and theoretical studies of exoplanets have matured substantially since the discovery of the first planets outside our Solar System. We now know of thousands of such planets, and together with those in our Solar System, they show a vast diversity in their types, compositions, and orbital characteristics. Understanding this diversity requires understanding where planets form and evo... DTSTART;TZID=Asia/Shanghai:20260115T093000 DTEND;TZID=Asia/Shanghai:20260115T103000 LAST-MODIFIED:20251231T094815Z LOCATION: SUMMARY:Physical and Chemical Conditions of Planetary Birth Environments URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1980.htm END:VEVENT BEGIN:VEVENT UID:1993@kiaa.pku.edu.cn DTSTAMP:20260227T102528Z CREATED:20260227T102528Z DESCRIPTION:I present the first three-dimensional (3D), full-sky dust map that reveals variations in the extinction curve, parameterized by R(V). Using Gaia XP spectra, we measure extinction curves for over 130 million stars—more than two orders of magnitude more than previously available—enabling us to trace dust properties across the Milky Way with unprecedented detail. Surprisingly, trends in this map... DTSTART;TZID=Asia/Shanghai:20260302T140000 DTEND;TZID=Asia/Shanghai:20260302T150000 LAST-MODIFIED:20260227T102528Z LOCATION: SUMMARY:An All-Sky 3D Extinction-Curve Map of the Milky Way: Insights into Interstellar Organics URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1993.htm END:VEVENT BEGIN:VEVENT UID:1992@kiaa.pku.edu.cn DTSTAMP:20260227T102202Z CREATED:20260227T102202Z DESCRIPTION:The Trapezium Cluster in Orion teaches us that massive stars often form together in compact systems—but how such dense OB groupings are assembled remains an open question. In this talk, I will present high-resolution observations with the Atacama Large Millimeter/submillimeter Array (ALMA) that reveal an exceptionally young, deeply embedded massive quadruple OB system in the making. The four m... DTSTART;TZID=Asia/Shanghai:20260304T140000 DTEND;TZID=Asia/Shanghai:20260304T150000 LAST-MODIFIED:20260227T102202Z LOCATION: SUMMARY:A Trapezium-like OB cluster in the making URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1992.htm END:VEVENT BEGIN:VEVENT UID:1995@kiaa.pku.edu.cn DTSTAMP:20260228T104315Z CREATED:20260228T104315Z DESCRIPTION:Thousands of extrasolar planets have been discovered up to date. Although many of the known exoplanets do not resemble those in our Solar System, they have one thing in common - they all orbit a star. However,  theories of planet formation and evolution predict the existence of free-floating planets, gravitationally unattached to any star.Gravitational microlensing is uniquely suited for findin... DTSTART;TZID=Asia/Shanghai:20260304T153000 DTEND;TZID=Asia/Shanghai:20260304T163000 LAST-MODIFIED:20260228T104315Z LOCATION: SUMMARY:Discovering free-floating planets with gravitational microlensing URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1096/1995.htm END:VEVENT BEGIN:VEVENT UID:1991@kiaa.pku.edu.cn DTSTAMP:20260226T102012Z CREATED:20260226T102012Z DESCRIPTION:Fast Radio Bursts (FRBs) are millisecond-duration cosmological transients with unclear origins. Understanding their origins requires not only identifying their emission mechanism, but also characterizing the environments in which they reside. Taking advantage of the high sensitivity of the Five-hundred-meter Aperture Spherical radio Telescope (FAST), we conducted long-term monitoring of the rep... DTSTART;TZID=Asia/Shanghai:20260305T150000 DTEND;TZID=Asia/Shanghai:20260305T160000 LAST-MODIFIED:20260226T102012Z LOCATION: SUMMARY:Magneto-Ionic Environment Evolution of FRB 20220529: Clues to a Possible Binary Origin URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1991.htm END:VEVENT BEGIN:VEVENT UID:1997@kiaa.pku.edu.cn DTSTAMP:20260304T094058Z CREATED:20260304T094058Z DESCRIPTION:Magnetic fields play a fundamental role in regulating the evolution of interstellar medium and star formation in the Milky Way. However, a comprehensive picture of the 3-dimensional magnetic fields in the Galactic 3-dimensional interstellar space remains unavailable. Spectral-line polarization arising from the Zeeman effect and Goldreich-Kylafis effect probes magnetic fields with velocity infor... DTSTART;TZID=Asia/Shanghai:20260309T150000 DTEND;TZID=Asia/Shanghai:20260309T160000 LAST-MODIFIED:20260304T094058Z LOCATION: SUMMARY:Mapping 3D Interstellar Magnetic Fields in the Era of Wide-field Surveys URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1997.htm END:VEVENT BEGIN:VEVENT UID:1998@kiaa.pku.edu.cn DTSTAMP:20260305T112555Z CREATED:20260305T112555Z DESCRIPTION:Angular momentum is a key quantity linking the formation of galaxies to the dynamics of the cosmic web. Building on a series of recent observational and theoretical works, this talk will present a picture of how angular momentum is generated, transported and reprocessedacross scales—from megaparsec-scale filaments, through galaxy clusters, down to individual galaxies. I will first show how lar... DTSTART;TZID=Asia/Shanghai:20260310T103000 DTEND;TZID=Asia/Shanghai:20260310T113000 LAST-MODIFIED:20260305T112555Z LOCATION: SUMMARY:Cosmic Dance: Angular Momentum Transfer from Large-scale to Small-scale URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/1998.htm END:VEVENT BEGIN:VEVENT UID:2011@kiaa.pku.edu.cn DTSTAMP:20260310T132325Z CREATED:20260310T132325Z DESCRIPTION:The tidal disruption of a star by a supermassive black hole and consequent accretion can lead to a transient electromagnetic flare in multiple bands. However, the origin of the detected emission from such tidal disruption events (TDEs) remains an open question. In this talk, I will discuss the potential emission mechanisms in TDEs during accretion disk formation, implied by series of 3D radiati... DTSTART;TZID=Asia/Shanghai:20260311T151500 DTEND;TZID=Asia/Shanghai:20260311T161500 LAST-MODIFIED:20260310T132325Z LOCATION: SUMMARY:Simulating Accretion and Early Light Curve in Tidal Disruption Event (TDE) URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/2011.htm END:VEVENT BEGIN:VEVENT UID:1996@kiaa.pku.edu.cn DTSTAMP:20260302T095701Z CREATED:20260302T095701Z DESCRIPTION:Dark matter distribution in galaxies is a key to test the LCDM and galaxy formation models. We measure the dark-matter mass distribution for a representative sample of 140 nearby galaxies by combining IFU data from MaNGA and HI spectra from FAST. We find strong evidence that these galaxies exhibit a lower dark-matter densities in their inner regions than predicted by cosmological simulations in... DTSTART;TZID=Asia/Shanghai:20260312T150000 DTEND;TZID=Asia/Shanghai:20260312T160000 LAST-MODIFIED:20260302T095701Z LOCATION: SUMMARY:Uncovering dark matter distributions: from the Milky Way to nearby galaxies URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1996.htm END:VEVENT BEGIN:VEVENT UID:2012@kiaa.pku.edu.cn DTSTAMP:20260312T100920Z CREATED:20260312T100920Z DESCRIPTION:Exoplanet inference often involves nonlinear forward models, high-dimensional parameter spaces, and strongly degenerate posteriors. In this seminar, I will present my recent work on Bayesian exoplanet inference using differentiable models, focusing primarily on a differentiable N-body framework for transit timing variations (TTVs) in multi-transiting systems. I will show how this approach enabl... DTSTART;TZID=Asia/Shanghai:20260318T153000 DTEND;TZID=Asia/Shanghai:20260318T163000 LAST-MODIFIED:20260312T100920Z LOCATION: SUMMARY:Bayesian Analyses of Transiting and Microlensing Planets Using Differentiable Models URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1096/2012.htm END:VEVENT BEGIN:VEVENT UID:1999@kiaa.pku.edu.cn DTSTAMP:20260310T110327Z CREATED:20260310T110327Z DESCRIPTION:Supermassive black hole (SMBH) binaries, formed during galaxy mergers, are the primary targets for low-frequency gravitational wave (GW) observatories. Understanding the coalescence process of SMBH binaries in a cosmological galaxy formation context is crucial for accurate GW predictions. However, this has been a long-standing challenge: traditional galaxy formation simulations lack the force r... DTSTART;TZID=Asia/Shanghai:20260319T150000 DTEND;TZID=Asia/Shanghai:20260319T160000 LAST-MODIFIED:20260310T110327Z LOCATION: SUMMARY:Resolving small-scale dynamics of supermassive black holes in galaxy formation simulations URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/1999.htm END:VEVENT BEGIN:VEVENT UID:2021@kiaa.pku.edu.cn DTSTAMP:20260323T134408Z CREATED:20260323T134408Z DESCRIPTION:In this talk, I will present the 4-metre Multi-Object Spectroscopic telescope as well as the recent news related to the on-going Science Phase Verification which aims to make different tests for all 4MOST science cases. I will in a second time present in more details the Cosmology Redshift Survey, especially the Bright Galaxies and Luminous Red Galaxies samples, as well as the quality checks an... DTSTART;TZID=Asia/Shanghai:20260325T100000 DTEND;TZID=Asia/Shanghai:20260325T110000 LAST-MODIFIED:20260323T134408Z LOCATION: SUMMARY:4MOST-Cosmology Redshift Survey: Overview URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/2021.htm END:VEVENT BEGIN:VEVENT UID:2000@kiaa.pku.edu.cn DTSTAMP:20260310T110743Z CREATED:20260310T110743Z DESCRIPTION:Galaxies evolve via internal and external processes. Kinematically misaligned galaxies, primarily stemming from external gas acquisition, are ideal probes of this process. From final data release of MaNGA, we selected ~700 misaligned galaxies (gas-gas, gas-star, star-star) and systematically investigated their origin and physical properties. Key findings: (1) Misaligned gas, often perpendicular... DTSTART;TZID=Asia/Shanghai:20260326T150000 DTEND;TZID=Asia/Shanghai:20260326T160000 LAST-MODIFIED:20260310T110743Z LOCATION: SUMMARY:Gas cycling processes in nearby galaxies URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/2000.htm END:VEVENT BEGIN:VEVENT UID:2022@kiaa.pku.edu.cn DTSTAMP:20260331T133835Z CREATED:20260331T133835Z DESCRIPTION:The DESI collaboration (Dark Energy Spectroscopic Instrument) confirmed its groundbreaking results on dynamical dark energy through the largest 3-dimensional Universe map it observed. This talk highlights how DESI’s Baryon Acoustic Oscillation (BAO) measurements from Data Release 2 further challenge the ΛCDM paradigm, the standard cosmology for the past 30 years. The second part of this talk ... DTSTART;TZID=Asia/Shanghai:20260331T140000 DTEND;TZID=Asia/Shanghai:20260331T150000 LAST-MODIFIED:20260331T133835Z LOCATION: SUMMARY:Dark Energy and Neutrino Mass – the Latest Hints from DESI Using Baryon Acoustic Oscillations URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1070/2022.htm END:VEVENT BEGIN:VEVENT UID:2001@kiaa.pku.edu.cn DTSTAMP:20260310T110923Z CREATED:20260310T110923Z DESCRIPTION:Fast Radio Bursts (FRBs) are millisecond-duration, high-energy radio transients of unknown origin, whose large dispersion measures indicate extragalactic, and possibly cosmological, distances. With the rapid advancement of radio telescope capabilities, the number of detected FRBs has increased dramatically, greatly advancing studies of their physical origins and cosmological applications. Howev... DTSTART;TZID=Asia/Shanghai:20260402T150000 DTEND;TZID=Asia/Shanghai:20260402T160000 LAST-MODIFIED:20260310T110923Z LOCATION: SUMMARY:一颗持续活跃的快速射电暴 A Persistently Active Repeating Fast Radio Burst URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/2001.htm END:VEVENT BEGIN:VEVENT UID:2002@kiaa.pku.edu.cn DTSTAMP:20260310T111115Z CREATED:20260310T111115Z DESCRIPTION:Globular clusters are massive star clusters that formed in high-redshift galaxies and remained gravitationally bound until the present. They serve as tracers of most active episodes of galactic star formation and allow us to reconstruct the assembly history of the Milky Way and nearby galaxies. I will describe a long-term program to model the formation and disruption of globular clusters throug... DTSTART;TZID=Asia/Shanghai:20260409T150000 DTEND;TZID=Asia/Shanghai:20260409T160000 LAST-MODIFIED:20260310T111115Z LOCATION: SUMMARY:Evolution of Globular Cluster Systems from High Redshift to the Present URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/2002.htm END:VEVENT BEGIN:VEVENT UID:2003@kiaa.pku.edu.cn DTSTAMP:20260310T112149Z CREATED:20260310T112149Z DESCRIPTION:Dust grains are fundamental constituents of diffuse matter throughout the universe, mediating key processes from interstellar chemistry to planet formation. Yet their microscopic behaviors, presumably governed by interactions at surfaces, has traditionally been treated through empirical and semi-quantitative prescriptions in most astrophysical models. In this report, we present a series of bott... DTSTART;TZID=Asia/Shanghai:20260416T150000 DTEND;TZID=Asia/Shanghai:20260416T160000 LAST-MODIFIED:20260310T112149Z LOCATION: SUMMARY:Atoms, Grains, Infinity: Consistent update the understandings of dust grain physics in diffuse matter astrophysics URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/2003.htm END:VEVENT BEGIN:VEVENT UID:2004@kiaa.pku.edu.cn DTSTAMP:20260310T113229Z CREATED:20260310T113229Z DESCRIPTION:Host: Xuening Ba DTSTART;TZID=Asia/Shanghai:20260423T150000 DTEND;TZID=Asia/Shanghai:20260423T160000 LAST-MODIFIED:20260310T113229Z LOCATION: SUMMARY:Jianghui Ji's talk URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/2004.htm END:VEVENT BEGIN:VEVENT UID:2005@kiaa.pku.edu.cn DTSTAMP:20260310T113936Z CREATED:20260310T113936Z DESCRIPTION:Host: Wei Zh DTSTART;TZID=Asia/Shanghai:20260507T150000 DTEND;TZID=Asia/Shanghai:20260507T160000 LAST-MODIFIED:20260310T113936Z LOCATION: SUMMARY:Subo Dong's talk URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/2005.htm END:VEVENT BEGIN:VEVENT UID:2006@kiaa.pku.edu.cn DTSTAMP:20260310T131557Z CREATED:20260310T131557Z DESCRIPTION:Host: Feng Yua DTSTART;TZID=Asia/Shanghai:20260514T150000 DTEND;TZID=Asia/Shanghai:20260514T160000 LAST-MODIFIED:20260310T131557Z LOCATION: SUMMARY:Feng Yuan's talk URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/2006.htm END:VEVENT BEGIN:VEVENT UID:2007@kiaa.pku.edu.cn DTSTAMP:20260310T131804Z CREATED:20260310T131804Z DESCRIPTION:Host: Junjie Ma DTSTART;TZID=Asia/Shanghai:20260521T150000 DTEND;TZID=Asia/Shanghai:20260521T160000 LAST-MODIFIED:20260310T131804Z LOCATION: SUMMARY:Yongquan Xue's talk URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/2007.htm END:VEVENT BEGIN:VEVENT UID:2008@kiaa.pku.edu.cn DTSTAMP:20260310T131918Z CREATED:20260310T131918Z DESCRIPTION:Host: Wei Zh DTSTART;TZID=Asia/Shanghai:20260528T150000 DTEND;TZID=Asia/Shanghai:20260528T160000 LAST-MODIFIED:20260310T131918Z LOCATION: SUMMARY:Eiichiro Kokubo's talk URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/2008.htm END:VEVENT BEGIN:VEVENT UID:2009@kiaa.pku.edu.cn DTSTAMP:20260310T132032Z CREATED:20260310T132032Z DESCRIPTION:Host: Song Huan DTSTART;TZID=Asia/Shanghai:20260604T150000 DTEND;TZID=Asia/Shanghai:20260604T160000 LAST-MODIFIED:20260310T132032Z LOCATION: SUMMARY:Huiyuan Wang's talk URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/2009.htm END:VEVENT BEGIN:VEVENT UID:2010@kiaa.pku.edu.cn DTSTAMP:20260310T132144Z CREATED:20260310T132144Z DESCRIPTION:Host: Cheng Zha DTSTART;TZID=Asia/Shanghai:20260611T150000 DTEND;TZID=Asia/Shanghai:20260611T160000 LAST-MODIFIED:20260310T132144Z LOCATION: SUMMARY:Longlong Feng's talk URL;TYPE=URI:http://calendar.astro.tsinghua.edu.cn/info/1069/2010.htm END:VEVENT END:VCALENDAR