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GR: Fachverband Gravitation und Relativitätstheorie

GR 10: Relativistic Astrophysics I

GR 10.1: Talk

Wednesday, March 13, 2024, 14:00–14:20, HBR 14: HS 2

Timing of pulsars in extreme mass ratio systems — •Eva Hackmann — ZARM, Universität Bremen

Binary systems of a pulsar and a black hole are very promising laboratories to determine the features of the combined gravitational field and to test General Relativity. A pulsar orbiting Sagittarius A*, the supermassive galactic center black hole, should allow for the determination of its mass and spin to unprecedented accuracy and to test e.g. the no-hair theorem. It is therefore of great importance to accurately model the effects of General Relativity. Different from the usual post-Newtonian treatment, we present an analytical timing formula based on the test particle limit in the extreme mass ratio system. The resulting relativistic delays of the pulsar signal are discussed.

Keywords: Pulsar timing; black hole; geodesics; extreme mass ratio