科学研究
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2023.06.12
The Power of Milky Way's Stellar Streams Enabled by Multi-Object Spectroscopic Surveys
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...
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2023.06.09
3D Structure and Extinction of Nearby Molecular Clouds
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, a 3D extinction map and the structure of these MCs can be retrieved and the clouds that overlap in the sk...
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2023.06.09
Radiation MagnetoHydrodynamic Simulations of Astrophysical Systems: from massive stars to black holes
Evolutions of stars, black hole accretion as well as interactions between stars and black holes play an important role in various astrophysical systems, such as supernova, X-ray binaries, AGNs as well as various transient phenomena. I will discuss some long standing issues related to massive star and black hole systems. Then I will describe some examples on how we can make progress on some of ...
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2023.06.08
Structure and dynamics of the local group galaxies
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...
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2023.06.08
Structure and dynamics of the local group galaxies
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...
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