Speaker
Описание
Abstract
When two black holes merge, the final black hole settles down by emitting gravitational waves at characteristic tones called quasinormal modes. In general relativity, these tones depend only on the black hole's mass and spin, so measuring several of them tests whether astrophysical black holes are exactly what Einstein's theory predicts. This is black hole spectroscopy. As detectors improve, we also need to improve our theoretical understanding. Nonlinear interactions of gravitational waves, quasinormal mode excitation for generic configurations, non-modal effects, and simultaneously inferring multiple modes in noisy data are some of these challenges. I will review recent progress on these questions and argue that precision spectroscopy requires a nonlinear understanding of how black holes relax.
Links
https://arxiv.org/abs/2505.23895 and others