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GR: Fachverband Gravitation und Relativitätstheorie

GR 11: Gravitational Waves and Astrophysics II

GR 11.2: Invited Talk

Thursday, March 23, 2023, 11:45–12:30, ZEU/0260

Tracing beyond GR physics with gravitational waves — •Daniela Doneva — Theoretical Astrophysics, University of Tübingen, 72076 Tübingen, Germany

Gravitational waves are among the ultimate tools to test fundamental physics and promise to answer the long-waiting question about the nature of gravity in the regime of strong fields. The degeneracies between different effects are a serious obstacle, though, to fulfilling this goal since modified gravity often leads to smaller cumulative changes. In the present talk we will focus on a few examples of interesting new effects we can observe in the gravitational wave spectrum that differ qualitatively from the standard picture in general relativity. This includes gravitational phase transition of neutron stars, jumps in the gravitational wave emission from merging black holes, and inverse chirp signal of extreme mass-ratio inspirals. Such effects are valuable because they are a smoking gun of beyond-GR physics that can be easily traced in observations.