Black holes and scattering resonances
- Date: Wednesday 30 January 2019, 16:30 – 17:30
- Location: Roger Stevens LT 14 (10M.14)
- Type: Analysis and Applications, Seminars, Pure Mathematics
- Cost: Free
Claude Warnick, University of Cambridge. Part of the analysis and applications seminar series
Recent experiments have, for the first time, directly measured gravitational waves created by colliding black holes. An important part of the signal from such events is the `ringdown’ phase where a distorted black hole emits radiation at certain fixed (complex) frequencies called the quasinormal frequencies. To mathematically model this phenomenon, one should study geometric wave equations on a class of open geometries. I will discuss how the quasinormal frequencies can be realised as eigenvalues of a (non-standard) spectral problem, with connections to scattering resonances on asymptotically hyperbolic manifolds. If time permits I will also discuss recent work with Gajic on the asymptotically flat case.