Description of our cosmological spacetime as a perturbed conformal Newtonian metric and implications for the backreaction proposal for the accelerating universe

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dc.creatorKolb, Edward W.
dc.creatorMarra, Valerio
dc.creatorMatarrese, Sabino
dc.date2008-07-02
dc.date2008-11-05
dc.date.accessioned2026-07-07T11:52:13Z
dc.date.available2026-07-07T11:52:13Z
dc.descriptionIt has been argued that the spacetime of our universe can be accurately described by a perturbed conformal Newtonian metric, and hence even large density inhomogeneities in a dust universe can not change the observables predicted by the homogeneous dust model. In this paper we study a spherically symmetric dust model and illustrate conditions under which large spatial variations in the expansion rate can invalidate the argument.
dc.description22 pages, 8 figures; replaced to fit the version accepted for publication in Phys. Rev. D
dc.identifierhttps://arxiv.org/abs/0807.0401
dc.identifierhttp://arxiv.org/abs/0807.0401
dc.identifierPhys.Rev.D78:103002,2008
dc.identifierdoi:10.1103/PhysRevD.78.103002
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/204159
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleDescription of our cosmological spacetime as a perturbed conformal Newtonian metric and implications for the backreaction proposal for the accelerating universe
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