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(Jan. 23) Gravitational waves from extreme mass ratio inspirals

Last updated :2018-01-18

Topic: Gravitational waves from extreme mass ratio inspirals
Speaker: Dr. LONG Jiang
(Universite Libre de Bruxelles)
Invited by: Dr. ZHANG Jiandong
Time: 10:30-11:30 am, Tuesday, January 23, 2018
Venue: Conference Room, TianQin Research Center for Gravitational Physics, 8th Floor, Administration Building, Zhuhai Campus, SYSU

Abstract:
We analytically compute time domain gravitational waveforms produced in the final stages of extreme mass ratio inspirals of non-spinning compact objects into supermassive nearly extremal Kerr black holes. The resulting gravitational waveforms consist of an intermediate polynomial ringdown phase followed by an exponential quasi-normal mode decay. The waveform amplitude exhibits critical behavior when the orbital angular momentum tends to a minimal value determined by the innermost stable circular orbit. We show that either near-critical or large angular momentum leads to a significant extension of gravitational wave observation.