Scale dependence of cosmological backreaction

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dc.creatorLi, Nan
dc.creatorSchwarz, Dominik J.
dc.date2007-10-26
dc.date2008-10-13
dc.date.accessioned2026-07-07T11:53:49Z
dc.date.available2026-07-07T11:53:49Z
dc.descriptionDue to the non-commutation of spatial averaging and temporal evolution, inhomogeneities and anisotropies (cosmic structures) influence the evolution of the averaged Universe via the cosmological backreaction mechanism. We study the backreaction effect as a function of averaging scale in a perturbative approach up to higher orders. We calculate the hierarchy of the critical scales, at which 10% effects show up from averaging at different orders. The dominant contribution comes from the averaged spatial curvature, observable up to scales of 200 Mpc. The cosmic variance of the local Hubble rate is 10% (5%) for spherical regions of radius 40 (60) Mpc. We compare our result to the one from Newtonian cosmology and Hubble Space Telescope Key Project data.
dc.description6 pages, 2 figures; v3: substantial modifications, new figures
dc.identifierhttps://arxiv.org/abs/0710.5073
dc.identifierhttp://arxiv.org/abs/0710.5073
dc.identifierPhys.Rev.D78:083531,2008
dc.identifierdoi:10.1103/PhysRevD.78.083531
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/204678
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.titleScale dependence of cosmological backreaction
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