Scientific article
Open access

Constraints on backreaction in dust universes

ContributorsRasanen, Syksy
Published inClassical and quantum gravity, vol. 23, p. 1823-1835
Publication date2006

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.

Citation (ISO format)
RASANEN, Syksy. Constraints on backreaction in dust universes. In: Classical and quantum gravity, 2006, vol. 23, p. 1823–1835. doi: 10.1088/0264-9381/23/6/001
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Article (Accepted version)
ISSN of the journal0264-9381

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