Testing black holes using X-ray reflection spectroscopy

主讲人 (Speaker): Cosimo Bambi

主讲人单位 (Speaker's Institute): 复旦大学

邀请人 (Invited by): 林伟鹏 教授

时间 (Time): 星期四, 2018/01/11 - 15:00 to 16:00

地点 (Location): 珠海校区海滨红楼17栋107会议室

摘要 (Abstract):

Einstein's gravity has been extensively tested in the weak field regime, mainly with experiments in the Solar System and observations of binary pulsars, and current data well agree with theoretical predictions. On the contrary, strong gravity is largely unexplored and there are a number of theories beyond Einstein's gravity having the same predictions for weak fields and presenting deviations only when gravity becomes strong. The best laboratory for testing strong gravity is the spacetime around astrophysical black holes. X-ray reflection spectroscopy can be a powerful tool to probe the strong gravity region around astrophysical black holes and test the nature of these objects. In this talk, I will present RELXILL_NK, which is the first Xspec reflection model to test Einstein's gravity in the strong field regime, and some preliminary constraints from XMM-Newton, NuSTAR, and Suzaku data.

主讲人简介 (Speaker's CV):

Education: 2007 Ph.D. in Physics. Ferrara University (Italy). Supervisor: Prof. Alexander D. Dolgov. 2003 Laurea in Physics summa cum laude. Florence University (Italy). Positions: 2016 -Present Xie Xide Junior Chair Professor of Physics. Fudan University (China) 2015 - Present Humboldt Fellow (visiting position). University of Tubingen (Germany) 2013 -2015 Full Professor. Fudan University (China). 2012 - 2013 Associate Professor (with tenure). Fudan University (China) 2011 - 2012 Postdoctoral Research Fellow. Dvali's Group, LMU Munich (Germany) 2008 - 2011 Project Researcher. IPMU, The University of Tokyo (Japan) 2007 - 2008 Postdoctoral Research Fellow. Wayne State University (Michigan) Honors and Awards: 2016 JSPS Invitation Fellowship for Research in Japan, Japan 2016 Named Xie Xide Junior Chair Professor of Physics at Fudan University, China 2015 Named Humboldt Fellow (Experienced Researcher), Germany 2012 Thousand Young Talents Award (Qingnian Qianren), China 2004 Ph.D. Fellowship of Ferrara University, Italy.