Stringent Restriction from the Growth of Large-Scale Structure on Apparent Acceleration in Inhomogeneous Cosmological Models

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dc.contributor.ISNI0000 0001 2874 3832 (Ishak-Boushaki, M)
dc.contributor.authorIshak-Boushaki, Mustaphaen_US
dc.contributor.authorPeel, Austinen_US
dc.contributor.authorTroxel, M. A.en_US
dc.contributor.utdAuthorIshak-Boushaki, Mustaphaen_US
dc.contributor.utdAuthorPeel, Austinen_US
dc.contributor.utdAuthorTroxel, M. A.en_US
dc.date.accessioned2014-07-18T22:32:11Zen_US
dc.date.available2014-07-18T22:32:11Zen_US
dc.date.created2013-12-19en_US
dc.date.issued2013-12-19en_US
dc.date.submitted2013-07-01en_US
dc.description.abstractProbes of cosmic expansion constitute the main basis for arguments to support or refute a possible apparent acceleration due to different expansion rates in the Universe as described by inhomogeneous cosmological models. We present in this Letter a separate argument based on results from an analysis of the growth rate of large-scale structure in the Universe as modeled by the inhomogeneous cosmological models of Szekeres. We use the models with no assumptions of spherical or axial symmetries. We find that while the Szekeres models can fit very well the observed expansion history without a Λ, they fail to produce the observed late-time suppression in the growth unless Λ is added to the dynamics. A simultaneous fit to the supernova and growth factor data shows that the cold dark matter model with a cosmological constant (ΛCDM) provides consistency with the data at a confidence level of 99.65%, while the Szekeres model without Λ achieves only a 60.46% level. When the data sets are considered separately, the Szekeres with no Λ fits the supernova data as well as the ΛCDM does, but provides a very poor fit to the growth data with only 31.31% consistency level compared to 99.99% for the ΛCDM. This absence of late-time growth suppression in inhomogeneous models without a Λ is consolidated by a physical explanation.en_US
dc.description.sponsorshipThis material is based upon work "supported in part by NASA under Grant No. NNX09AJ55G."en_US
dc.identifier.bibliographicCitationIshak, M., A. Peel, and M. A. Troxel. 2013. "Stringent restriction from the growth of large-scale structure on apparent acceleration in inhomogeneous cosmological models." Physical Review Letters 111(25), doi:10.1103/PhysRevLett.111.251302en_US
dc.identifier.issn0031-9007en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/3733
dc.identifier.volume111en_US
dc.language.isoenen_US
dc.relation.urihttp://dx.doi.org/10.1103/PhysRevLett.111.251302
dc.rights©2013 American Physical Societyen_US
dc.sourcePhysical Review Letters
dc.subjectSzekeres, Peter, 1940-en_US
dc.subjectRed shiften_US
dc.subjectTime suppressionen_US
dc.subjectCosmological constantsen_US
dc.subjectCosmology--Mathematical modelsen_US
dc.titleStringent Restriction from the Growth of Large-Scale Structure on Apparent Acceleration in Inhomogeneous Cosmological Modelsen_US
dc.typeTexten_US
dc.type.genreArticleen_US

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