Constraints on backreaction in dust universes

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http://hdl.handle.net/10138/310243

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Räsänen , S 2006 , ' Constraints on backreaction in dust universes ' , Classical and Quantum Gravity , vol. 23 , no. 6 , pp. 1823-1835 . https://doi.org/10.1088/0264-9381/23/6/001

Title: Constraints on backreaction in dust universes
Author: Räsänen, Syksy
Other contributor: University of Helsinki, Department of Physics
Date: 2006-02-23
Language: eng
Number of pages: 13
Belongs to series: Classical and Quantum Gravity
ISSN: 0264-9381
DOI: https://doi.org/10.1088/0264-9381/23/6/001
URI: http://hdl.handle.net/10138/310243
Abstract: We study backreaction in dust universes using exact equations which do not rely on perturbation theory, concentrating on theoretical and observational constraints. In particular, we discuss the recent suggestion (in hep-th/0503117) that superhorizon perturbations could explain present-day accelerated expansion as a useful example which can be ruled out. We note that a backreaction explanation of late-time acceleration will have to involve spatial curvature and subhorizon perturbations.
Subject: 114 Physical sciences
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