準正態模式的重力餘波


Seminar:- Tail of Gravitational Waves, Quasi-normal Modes 
 
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.
 
時間:2019.08.15(三) 14:00
地點:香港科技大學 李兆基校園 盧家驄薈萃樓 高研院4042室
講者:黃崇清 博士 Dr. Sam WONG(Columbia University)
語言:英語

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此活動由香港科技大學 賽馬會高等研究院主辦。