Backreaction in the Lemaitre-Tolman-Bondi model
General Relativity and Quantum Cosmology
2008-11-26 v2 Astrophysics
High Energy Physics - Theory
Abstract
We study backreaction analytically using the parabolic Lemaitre-Tolman-Bondi universe as a toy model. We calculate the average expansion rate and energy density on two different hypersurfaces and compare the results. We also consider the Hubble law and find that backreaction slows down the expansion if measured with proper time, but speeds it up if measured with energy density.
Keywords
Cite
@article{arxiv.gr-qc/0408097,
title = {Backreaction in the Lemaitre-Tolman-Bondi model},
author = {Syksy Rasanen},
journal= {arXiv preprint arXiv:gr-qc/0408097},
year = {2008}
}
Comments
11 pages, JCAP-style. v2: Published version. One added reference, no major changes