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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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2020.12.22
Workflow of deep learning application on astronomical research: Hunting Giant Radio Galxy as an case study
Machine learning application upon astronomical studies can be traced back to 1990s, while it was until recent years that astronomical community started to pay significant attention to this area. In th...
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2020.12.15
Mass tranfer in AGB binaries - uncovering a new evolution channel by simulations
The origin of chemically peculiar stars and non-zero eccentricity in evolved close binaries have been long-standing problems in binary stellar evolution. Answers to these questions may trace back to a...
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2020.12.14
时域天文学与司天工程 Time-domain astrophysics and the "sitian” project
天文学的发展，持久的动力来自观测，特别是突破性的新发现。观测天文学目前已经从刻画静态宇宙发展到认识动态宇宙，通过多波段、时域监测来揭示宇宙中各类天体的变化并发现和探索各类新天体、新现象。时域天文学已然...
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