科学研究
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2023.08.21
Uncovering the Formation and Evolution of Planetary Systems: The Architecture of Hot Jupiter Systems and the Search for Young Planets
The formation and evolution of planetary systems are critical links in understanding how we came to be. With an eye on exoplanet demography, my talk outlines two observational approaches for studying planet formation and evolution. In the first approach, I focus on the aftermath of planet formation by estimating the occurrence rate of hot jupiters with an inner companion planet through a system...
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2023.08.15
Active Galactic Nuclei in the NuSTAR Era
Active galactic nuclei (AGN), which represent the rapidly growing phase of the supermassive black holes (SMBH), radiate across the whole electromagnetic spectrum fromradio to Gamma-rays. X-rays, which are seen in most AGN, are an important tool to study the physics of AGN. Thanks to the launch of NuSTAR in 2012, we are able to probe AGN properties in the hard X-ray regime for the first time. In...
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2023.08.15
How tides change the orbit of binaries and a new open-source code, gyre_tides, to model stellar tides 潮汐如何改变双星系统的轨道以及介绍一个新的用于计算恒星潮汐的开源代码gyre-tides
GYRE is an open-source stellar oscillation code that calculates wave frequencies and functions for the (unforced) natural modes of an input stellar model. Recently, the code's capabilities have been extended to encompass forced oscillations, allowing it to calculate the interior perturbations of a star caused by the gravitational field of a companion. The standard approach to simulating tides i...
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2023.08.14
Simulating the first stars, galaxies, and black holes in the Universe
Prof. John Wise from Georgia Tech and the director at the Center for Relativistic Astrophysics (CRA)Host: Song Huan
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2023.08.10
Dynamics of Transneptunian Objects under the Influence of a Rogue Planet (Thesis Talk) 海王星外天体在流浪行星影响下的动力学
Over the past two decades, our knowledge of the Solar System’s transneptunian region (often called the Kuiper Belt) has been gradually increasing. Observational surveys have greatly expanded the inventory of Trans-Neptunian Objects (TNOs), which are distant icy bodies thought to be relics from the giant planet formation era.In the distant Kuiper Belt, several striking features seem to challeng...
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