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GR: Fachverband Gravitation und Relativitätstheorie

GR 1: Kosmologie

GR 1.3: Vortrag

Montag, 3. März 2008, 17:25–17:45, KGI-HS 1010

An attempt to investigate the Local spacetime geometry — •Hans Joerg Fahr and Mark Siewert — Argelander Institut für Astronomie , Universität Bonn, Auf dem Huegel 71, 53121 Bonn

It is expected that the global Robertson-Walker metric describing cosmological expansion is not valid close to singular masses. The answer given by Einstein and Straus, how to connect the global Robertson-Walker metric with the local outer Schwarzschild metric, is not satisfying in view of astronomical facts. Here we shall give a new description of a local metric which is of the Robertson-Walker type, but connected with a local scale function. We look for solutions of this local scale function as function of time and predict photon frequency shifts for photons freely propagating in such local spacetime metrics, e.g. valid in the heliosphere.