【11.4; Seminar】2025年粒子天体物理全国重点实验室系列学术报告 #28：EMRI astrophysics in light of QPEs

时间/Time: 11月4日周二上午10:00/Tuesday, November 4, 10:00 a.m.

地点/Location: 多学科楼312会议室/Meeting Room 312, Multidisciplinary building

报告人/Speaker: 潘震（上海交通大学/李政道研究所）

题目/Title: EMRI astrophysics in light of QPEs

主持人/Host: 陶炼/Lian Tao

摘要/Abstract:

Quasi-periodic eruptions (QPEs) are intense repeating soft X-ray bursts with recurrence times about a few hours to a few weeks from galactic nuclei. More and more observations show that QPEs are associated with tidal disruption events (TDEs), especially TDEs in recently faded active galactic nucleis (AGNs). The intriguing timing pattern of QPEs indicates that (at least a fraction of) QPEs are the result of collisions between a stellar mass object and an accretion disk around a supermassive black hole (SMBH), i.e., EMRI (extreme mass ratio inspiral +disk model. From QPE timing, one can robustly measure the SMBH mass and the EMRI orbital parameters. The QPE timing method opens up the possibility for precision measurement of SMBHs, though the current bottleneck is the limited X-ray observation resources available. The multi-target X-ray telescope under construction, CATCH, will be the solution.

个人简介/Biography:

Zhen Pan earned his Ph.D. at the University of California, Davis in 2018 and continued his research as a postdoctoral fellow at the Perimeter Institute through 2023. He currently holds a junior faculty position at the T.D. Lee Institute and the Department of Astronomy Shanghai Jiao Tong University. His primary research efforts are dedicated to two-body and many-body problems in astrophysics.