报告题目：Constraining modified gravity theory

in strong gravitational lensing and black hole shadow observations

报告人：况小梅 教授（扬州大学）

报告时间：2022年11月10日（周四）下午15:00-16:00

报告地点：在线报告（腾讯会议ID：442 4477 5872）

报告摘要：

In this talk, I will present the constraint on the parameter in modified gravity (MOG) theory with the use of Event Horizon Telescope observations for supermassive M87* and SgrA* black holes respectively, which is much tighter compared with the result obtained from the orbital precession of the S2 star. Then I will show the differences in lensing observables (including the image position, separation, magnification and the time delays between the relativistic images) between the rotating black hole in MOG and the Kerr black hole in general relativity, which are presupposed as supermassive black holes in M87* and SgrA*. I will argue that the evaluations on lensing observables can help to distinguish the MOG from GR.

参考文献：

[1]Xiao-Mei Kuang*, Zi-Yu Tang, Bin Wang, Anzhong Wang, Constraining a modified gravity theory in strong gravitational lensing and black hole shadow observations, PHYS. REV. D 106, 064012 (2022), [arXiv:2206.05878].
[2]Yuan Meng, Xiao-Mei Kuang*, Zi-Yu Tang, Photon regions, shadow observables and constraints from M87* of a charged rotating black hole, PHYS. REV. D 106, 064006 (2022), [arXiv:2204.00897].

报告人简介：

况小梅，扬州大学教授。2014年于上海交通大学获得理学博士学位。 随后分别在希腊雅典国家技术大学、智利瓦尔帕莱索天主教大学做博士后。2017年底加入扬州大学工作，2018年获聘江苏省特聘教授。近年来研究兴趣集中在黑洞稳定性、黑洞阴影及全息引力等。在PRD、JHEP、EPJC等发表学术论文65篇, INSPIRE引用千余次。

报告链接：

Constraining modified gravity theory in strong gravitational lensing and black_哔哩哔哩_bilibili