潮汐崩潰事件作為超愛丁頓極限光度黑洞吸積的探測器


SEMINAR:- Tidal Disruption Events as a Probe of Super-Eddington Accretion onto Black Holes 
 
The tidal disruption of a star by a massive black hole provides a unique opportunity for us to understand the physics of accretion onto black holes. So far about 50 tidal disruption events (TDEs) have been detected using X-ray, UV, optical and radio telescopes. In the first few months of the burst, the rate that stellar materials is supplied to the black hole can greatly exceed the Eddington accretion rate, giving us a perfect window to peek into super-Eddington accretion. The understanding of super-Eddington accretion, such as whether the Eddington luminosity limit can be violated, has important implications for black hole growth and galaxy evolution in the early universe. In this talk, the speaker will first give a brief summary of the observational status of TDEs. Then she will give an introduction to the TDE physics, and present their theoretical calculations on what parameters of the black hole and star can make super-Eddington accretion happen. Lastly, the speaker will talk about their ongoing general relativistic radiation magnetohydrodynamics simulations of superEddington accretion disks in the context of TDEs. Results from these simulations can explain some previously poorly understood observational properties of TDEs, and can be applied to study other astrophysical systems such as active galactic nuclei and X-ray binaries. 
 
時間:2016.11.22(二) 15:30 ~ 16:15
地點:香港中文大學 科學館北座G25室
講者:戴麗心 博士 Dr. Lixin Jane DAI (Department of Physics University of Maryland, USA) 
語言:英語

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【訊息由張詠倫提供】

此活動由香港中文大學物理系主辦。

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