科学研究
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2023.11.13
Understanding the galaxy formation and metal-enrichment in the view of gas-regulator framework
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...
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2023.11.10
The binarity in massive star explosion -- A 12.4 day periodicity in a close binary system after a supernova
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 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 periodic undulations during...
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2023.11.10
Exploring galaxy dark matter with dynamical models using combined stellar and HI kinematics
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...
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2023.11.09
Like a wrecking ball: understanding giant planets as the key to finding Earths
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...
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2023.11.03
Unprecedented insights into the formation and evolution of the Galactic disk.
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...
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