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2023.10.19

Radio observations of fast variations in microquasars

<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>

2023.10.12

Formation of Merging Compact Binaries

<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>

2023.09.28

Cosmic neutrinos: a new window into the extreme Universe

<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>

2023.09.11

Stellar Object Formation and Evolution in AGN Disks

<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>

2023.09.21

Thermal convection in rapidly rotating oblate spheroidal planets

<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>

2023.09.07

Probing Galaxy Formation in the Cosmic Web at z~3: A View with the James Webb Space Telescope

<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>

2023.09.08

Eruptive YSOs in the large-survey era

<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>

2023.09.15

AGN Feedback in Dwarfs and Giants Near and Far

<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>

2023.08.30

eROSITA All Sky Survey: X-ray emission around galaxies

<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>

2023.08.24

Uncovering the Formation and Evolution of Planetary Systems: The Architecture of Hot Jupiter Systems and the Search for Young Planets

<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>