题目：Using supercomputers to search for black holes in globular and nuclear star clusters

报告人：Rainer Spurzem

时间：2023年11月2日（周四）15:30

地点：紫金港校区海纳苑8幢324室

摘要：Nuclear and globular star clusters (NSC and GC) are spectacular self-gravitating stellar systems in our Galaxy and across the Universe. Direct N-body simulations are the most computationally expensive but also the most astrophysically advanced method to simulated GC and NSC evolution, using massively parallel supercomputers with GPU acceleration. Algorithmic and astrophysical improvements of Nbody6++GPU in recent years are shown and selected current results. NSCs are of interest as sources of gravitational waves and tidal disruption events. On the contrary, recent high-resolution imaging is available for many GCs around galaxies in the Local Group. GCs therefore are the ideal laboratory for the concomitant study of stellar evolution and Newtonian as well as relativistic dynamics. Preliminary results applying all of this to NSC will be shown, together with a novel and detailed treatment of tidal disruption events, tidal disruption of binaries, direct capture of low-mass stars by the central supermassive black hole, and tidal capture through classical tidal dissipation or relativistic dynamics.

个人简介：

Rainer Spurzem is the Adjunct Professor at NAOC and KIAA

Rainer Spurzem was the first to simulate core collapse of a star cluster using a direct N-body algorithm on a supercomputer