Backreaction in the Lemaitre-Tolman-Bondi model

Details Backreaction in the Lemaitre-Tolman-Bondi model Backreaction in the Lemaitre-Tolman-Bondi model

2004-08-31

arxiv.org/abs/gr-qc/0408097v2

JCAP0411:010,2004

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

11 pages, JCAP-style. v2: Published version. One added reference, no major changes

Scientific paper

10.1088/1475-7516/2004/11/010

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.

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