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Backreaction in the Lemaitre-Tolman-Bondi model

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Published in Journal of Cosmology and Astroparticle Physics. 2004, vol. 10, no. 0411, p. 11
Abstract We study backreaction analytically using the parabolic Lemaˆıtre-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 gravitymean mass density
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RASANEN, Syksy. Backreaction in the Lemaitre-Tolman-Bondi model. In: Journal of Cosmology and Astroparticle Physics, 2004, vol. 10, n° 0411, p. 11. https://archive-ouverte.unige.ch/unige:2557

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Deposited on : 2009-08-31

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