Gravity seminar - Laura Sberna Seminar

Abstract: In the ringing of a black hole, the nonlinearity of Einstein’s theory can appear in weak and subtle ways. The importance of these nonlinearities has only been appreciated in the past few years, thanks to accurate numerical relativity simulations, and in anticipation of the next generation of gravitational-wave detectors. I will review our current understanding of quasinormal modes, the defining characteristic of black hole ringing, and discuss whether we can do perturbation theory using these modes.