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Göttingen 2012 – scientific programme

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GR: Fachverband Gravitation und Relativitätstheorie

GR 2: Kosmologie I

GR 2.1: Talk

Monday, February 27, 2012, 15:30–15:50, ZHG 002

Backreaction in the relativistic Zel'dovich approximation — •Alexander Wiegand1, Thomas Buchert2, and Charly Nayet21Fakultät für Physik, Universität Bielefeld, Deutschland — 2Centre de Recherche Astrophysique de Lyon, Frankreich

Zel'dovich's approximation is in Newtownian cosmology a practical tool to investigate the evolution of mildly nonlinear regions of the Universe. Its extension to the relativistic case is important for the investigation of the backreaction of inhomogeneities on the evolution history of spatial domains of the Universe. This talk presents a Lagrangian framework that allows for a one to one correspondence of Newtownian and general relativistic quantities and provides a perturbative backreaction model, together with domain-dependent quantitiative estimates of the backreaction effect.

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