Bonn 2020 – scientific programme

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GR: Fachverband Gravitation und Relativitätstheorie

GR 9: Black Holes 2

GR 9.1: Talk

Wednesday, April 1, 2020, 14:00–14:15, H-HS IX

Gravitational Lensing by an Accelerating Black Hole — Torben Frost and •Volker Perlick — ZARM, University of Bremen, Bremen, Germany

The C-metric is an exact solution of Einstein's vacuum field equations. It generalises the Schwarzschild metric by introducing an acceleration parameter and describes the spacetime of an accelerating black hole. Although it is plagued by unphysical singularities, a conical singularity on the axis of acceleration and another one hidden behind the acceleration horizon, it can be used as a first attempt to describe linearly accelerating black holes. In our work we investigate the effect of the acceleration on classical lensing observables, e.g., redshift, lens map and travel time. We discuss the differences in comparison to the Schwarzschild metric and if and how the effects of the acceleration parameter can be investigated using astrophysical observations.