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学术报告(20180517)Spin Evolution of Massive Black Holes in Galactic Centers
发布时间:2018-05-17

报告题目: Spin Evolution of Massive Black Holes in Galactic Centers
报告人: 陆由俊研究员
报告人单位: 中国科学院国家天文台
报告时间: 2018年5月17日上午 2:30 -3:40
报告地点: 东七楼,四楼427会议室
报告摘要:  
  Massive Black Holes (MBHs) in galactic centers are believed to be described by the Kerr metric with only two parameters (mass and spin; no-hair theorem). The distribution of those MBHs on the mass and spin plane contains rich information on the MBH growth history. In this talk, I will report our recent investigations on the spin evolution of MBHs under various accretion processes. We show that different accretion modes (e.g., coherent, chaotic, or tidal star accretion) result in quite different spin distribution. Assuming a two phase accretion model, an initial coherent accretion followed by a later chaotic accretion phase, we use the current available spin measurements to obtain constraints on the MBH growth history. I will also talk about the correlation between the radiative efficiency of QSOs and the MBH mass.
报告人简介:  
  陆由俊,中国科学院百人计划入选者。中国科学院国家天文台研究员。研究领域包括理论天体物理,包括动力学,黑洞和星系物理,活动星系核和类星体,宇宙结构形成、演化和再电离过程等。

 

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