科学研究
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2022.04.11
The Milky Way Halo Stars toward the Galactic Center
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...
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2021.11.15
High-precision Astrometry (高精度天体测量)
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...
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2021.06.11
Bridging geometric and wave optics through the complex plane
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 ...
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2021.05.18
Testing General Relativity with black hole X-ray data: recent progress and future developments
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...
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2021.04.16
Galactic Mass and Anisotropy Profile with Halo K-Giant and Blue Horizontal Branch Stars from LAMOST/SDSS and Gaia
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 )...
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