Constraints on backreaction in dust universes

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dc.creatorRasanen, Syksy
dc.date2005-04-01
dc.date2006-02-23
dc.date.accessioned2026-07-07T06:37:09Z
dc.date.available2026-07-07T06:37:09Z
dc.descriptionWe 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.
dc.description15 pages, 1 figure. v2: The numbers in observational constraints corrected (no qualitative change), added discussion and references. v3: More references, clearer presentation, a new section on theoretical bounds. Conclusions stronger. v4: Published version. No major changes
dc.identifierhttps://arxiv.org/abs/astro-ph/0504005
dc.identifierhttp://arxiv.org/abs/astro-ph/0504005
dc.identifierClass.Quant.Grav. 23 (2006) 1823-1835
dc.identifierdoi:10.1088/0264-9381/23/6/001
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/100294
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.titleConstraints on backreaction in dust universes
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