科学研究
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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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