Zoom link: https://gu-se.zoom.us/j/2119655087?pwd=UHJNdG9QT0doZnRtelowVzRvWDkzZz09
Title: Gravitational waves from ultra-compact stars: new theoretical results
Prof. Marek Abramowicz, University of Gothenburg
I present a recent analytic solution (Horak & Abramowicz 2021, unpublished) that describes quasi-normal modes of super-compact stars close to the Bondi limit. In the LIGO-Virgo terminology these are wave-fronts and frequencies of ringdowns and echoes. The new results will help distinguishing between black hole versus non black hole origin of the waves. They may also constrain some quantum-gravity ideas about the quantum black hole alternatives, like firewalls and gravastars.
Henrik Johannesson, email@example.com