Speaker
Dr
Zhen Pan
(T.D. Lee Institute, Shanghai Jiao-Tong University)
Description
Quasi-periodic eruptions (QPEs) are intense repeating soft X-ray bursts with recurrence times about a few hours to a few days from galactic nuclei. More and more analyses show that QPEs are the result of collisions between an EMRI and an accretion disk around a supermassive black hole (SMBH) in galactic nuclei (EMRI+disk model). In this talk, I will first review exisisting QPE observations and the evidence for the EMRI+disk model,then report a Bayesian framework we have constructed for analyzing QPE data, and show that QPEs (EM signals of EMRIs) are a sensitive probe to the EMRI orbits and the SMBH spacetime.
