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Past Events
Detection of gravitational waves from black hole ringing
| Speaker: | Dr. Yifan WANG |
| Affiliation: | Max Planck Institute for Gravitational Physics |
| Date: | November 22, 2023 (Wednesday) |
| Time: | 2:15 p.m. |
| Venue: | Room 522, 5/F, Chong Yuet Ming Physics Building, The University of Hong Kong |
Abstract
The fourth observation run of LIGO, Virgo and KAGRA began in May of 2023, offering an exciting opportunity for gravitational-wave astronomy. I'll briefly highlight a couple of discoveries in the past few years. Then I'll discuss the gravitational wave from black hole ringdown. According to the no-hair theorem, the frequency is uniquely determined by the black hole mass and spin. Due to its analogy to atomic spectroscopy, this is often known as black hole spectroscopy. I'll present my recent work [1] and [2], where we report the detection of higher-order fundamental mode and overtone, respectively, from ringdown. These observations suggest black hole spectroscopy is a promising way to test general relativity.
Biography
Dr. Yifan Wang is a postdoc researcher at the Max Planck Institute for Gravitational Physics (Albert Einstein Institute), Germany. He obtained the Ph.D. degree from the Chinese University of Hong Kong with the thesis "Hunting for primordial black holes with stochastic gravitational-wave background". His current research interests are expanding the detection horizons of gravitational waves by searching for novel sources, such as highly spinning neutron stars, long gamma-ray burst counterparts, etc; he is also currently interested in probing black holes with gravitational waves from ringdown.
Anyone interested is welcome to attend.