Seminar
Tail of Gravitational Waves, Quasi-normal Modes
Dr.
Sam WONG
Columbia University
15 August 2019 (Thursday)
2:00 pm
IAS4042, 4/F, Lo Ka Chung Building, Lee Shau Kee Campus, HKUST
Quasi-normal modes (QNM) describe the return to equilibrium of a perturbed system, in particular the ring-down phase of a black hole merger. In this talk, the speaker will first review QNM of a Schwarzschild black hole. As a globally defined quantity, QNM is highly sensitive to global spacetime structure. For instance, placing a star far away from a black hole alters the QNM spectrum by a huge amount. The speaker and his research team will demonstrate analytically how to identify the QNM spectrum of a localized object from the global QNM. Finally, the speaker will mention some mysterious properties of black hole QNM spectrum in Einstein gravity.
The seminar is free and open to the public. No registration is required. Seating is on a first come, first served basis.
HKUST Jockey Club Institute for Advanced Study
URL:
http://ias.ust.hk
Enquiries: ias@ust.hk / 2358 5912
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