Heidelberg 2022 – wissenschaftliches Programm

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GR: Fachverband Gravitation und Relativitätstheorie

GR 1: Black Holes

GR 1.2: Vortrag

Montag, 21. März 2022, 09:20–09:40, GR-H2

Gravitational Lensing in the NUT Spacetime — •Torben C. Frost — ZARM, University of Bremen, 28359 Bremen, Germany — Institute for Theoretical Physics, Leibniz University Hannover, 30167 Hannover, Germany

The existence of a gravitomagnetic charge, the gravitational analogon to a hypothetical magnetic charge in electrodynamics, is a long-standing open question in physics. In my talk I will discuss how we can use gravitational lensing to identify if a black hole in nature carries a gravitomagnetic charge. For this purpose I will assume that they are described by the NUT metric. We will solve the geodesic equations using Legendre's elliptic integrals and Jacobi's elliptic functions. Then we will rederive the angular radius of the shadow, formulate a lens equation, derive redshift and travel time.