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2022.10.20

Multi-faceted Views of Planetary Systems

<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>

2022.10.13

Cosmology with Massive Neutrinos

<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>

2022.09.29

Computational Imaging for Astronomy: from Exoplanets to Black Holes

<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>

2022.09.22

Black Hole and Magnetar Studies with the Imaging X-ray Polarimetry Explorer

<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>

2022.09.15

The Age of Discovery with JWST: Excavating the First Massive Black Holes and First Galaxies

<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>

2022.06.02

The importance of pre-processing for cluster galaxies

<p>Host: Emmet</p>

2022.06.09

Similarities in the formation and dynamical evolution between planetary systems, active galactic nuclei, and epicenters of gravitational waves

<p>Host: Yi Mao</p>

2022.05.26

Quasars in a Neutral Universe

<p>Host: Zheng Cai</p>

2022.05.25

Semi-analytic spectral fitting: simultaneously modelling the mass accumulation and chemical evolution in MaNGA spiral galaxies

<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>

2022.06.23

Unveiling the early stages of planet formation

<p>Host: Haochang Jiang</p>