Title: Testing Relativity Through Stellar Orbits around Massive Black Hole

Speaker: Fupeng Zhang (Guangzhou University)

Time: 10:30, December 30, 2021

Location: 3-302, PMO Xianlin Campus

Abstract: The relativistic motion of stellar objects around a massive black hole (MBH) provide an ideal laboratory to test various relativistic effects in strong field regions of gravity. By using full-relativistic numerical methods, we can obtain the orbits of stellar objects and the propagation of photons around the MBH. In this talk we will introduce our predictions of the constraints of the spin parameter of the Sgr A* (The MBH in our Galatic center) by monitoring the orbital motions of S-stars using future telescopes (e.g., TMT) and pulsars (e.g., SKA). We will also introduce our recent work on the relativistic tests by monitoring the X-ray periodic eruptions due to star-disc collisions in some active galaxies.