Heidelberg 2022 – wissenschaftliches Programm

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GR: Fachverband Gravitation und Relativitätstheorie

GR 1: Black Holes

GR 1.6: Vortrag

Montag, 21. März 2022, 10:40–11:00, GR-H2

Black hole shadows enlightening quantum gravity — •Michael Florian Wondrak, Kolja Kuijpers, Jesse Daas, Frank Saueressig, and Heino Falcke — Institute for Mathematics, Astrophysics and Particle Physics (IMAPP), Radboud University, Nijmegen, The Netherlands

With the advent of the Event Horizon Telescope, the shadow of supermassive black holes could be resolved for the first time. Tests of the general theory of relativity at this strong-field regime come into reach. Probing quantum gravity is particularly interesting.

In this talk, we focus on extending the Einstein–Hilbert action by higher curvature terms which necessarily arise as counterterms upon quantization. We numerically solve the equations, find solutions with and without horizons, and extract the corresponding shadow radii. The results are discussed regarding observability.