Constraints on backreaction in a dust universe

Preprint

7 June 2005

preprint
Published by arXiv in arXiv

Abstract

We study backreaction in a dust universe 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.

Keywords

SUBHORIZON PERTURBATIONS
PERTURBATION THEORY
STUDY BACKREACTION
DUST UNIVERSE
USING EXACT
CONSTRAINTS
ACCELERATED

All Related Versions

Version 1, 2005-04-01, ArXiv
Version 2, 2005-04-14, ArXiv
Version 3, 2005-06-07, ArXiv
Version 4, 2006-02-23, ArXiv
Published version: Classical and Quantum Gravity, 23 (6), 1823.

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