Fast Inflows Directly Feeding Black Hole Accretion Disk in Galactic Centers

报告摘要：As the most luminous cosmic lighthouses, active galactic nuclei are believed to be powered by accretion of interstellar mass onto a massive black hole. Despite the success of this black hole accretion paradigm since its first clear putting forward half a century ago, fundamental questions remain unanswered: whether and how the accretion disks are supplied with external mass? The answers are essential for understanding further questions as to what sets off, maintains, and terminates the black hole activity and how long the active phase lasts for? I will talk about how to track these black hole inflows using hydrogen and helium absorption lines and the first discovery of such long-awaited inflows.
报告人简介：周宏岩，男，1989年毕业于中国科学技术大学近代物理系。现任中国科学技术大学天文学系教授、博士生导师；中国极地研究中心研究员、南极天文学科负责人，国家极区空间碎片监测与应用创新团队负责人。研究方向:黑洞物理、星系天文和太阳系外行星。历任中国科学技术大学讲师、副教授，美国佛罗里达大学访问教授，德国马克斯-普朗克地外物理研究所洪堡学者。在ApJ、MNRAS、Nature等国际刊物发表学术论文约100多篇，被引用3000多次。代表性研究成果：发现黑洞引力辐射反冲第一个观测证据；首先提出可利用光学光谱和红外连续谱光变探测黑洞潮汐力瓦解吸积恒星；提出了确定类星体外流方向的新思想并发现极向外流；首次发现直供黑洞吸积盘的内流。