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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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2021.04.07
High dynamic range wide field imaging method in radio interferometry
Wide-field radio-interferometer surveys at high resolution, relatively low frequency and with very high dynamic range requirement play a prominent role in current and forthcoming radio astronomy progr...
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2021.03.31
Stormy weather on brown dwarfs and isolated young giant planets
Brown dwarfs and relatively isolated young extrasolar giant planets occupy an important parameter space to understand planetary atmospheres. Recent observations of these worlds have provided unprecede...
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2021.03.16
A new vocabulary for patterns and its cosmological applications, or, a CNN without training
Textures and patterns are ubiquitous in astronomical data but challenging to quantify. The speaker will present a novel statistical tool, called the “scattering transform”. It borrows ideas from con...
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2021.01.12
High-resolution spectroscopy of ionized plasmas in the Universe
Ionized plasmas are ubiquitous in the Universe: from stellar coronae to cosmic web filaments. Characterizing ionized plasmas is critical to address many astrophysical questions, for instance, the inte...
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2021.01.11
The radio-bright future of studying black holes
In recent years we witnessed tremendous progress in high frequency very long baseline radiointerferometry (VLBI). These developments were most notably marked by the first image of a supermassive black...
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2021.01.08
Bridging the Gap Between Galaxy and Star Formation with Star Clusters
Over the past decades, the discovery of a large number of young massive clusters (YMCs) in the local Universe and giant clumps in high-z galaxies suggests that clustered star formation is the dominant...
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