HEAL DSpace

Cosmic acceleration driven by mirage inhomogeneities

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dc.contributor.author Galfard, C en
dc.contributor.author Germani, C en
dc.contributor.author Kehagias, A en
dc.date.accessioned 2014-03-01T01:23:45Z
dc.date.available 2014-03-01T01:23:45Z
dc.date.issued 2006 en
dc.identifier.issn 0264-9381 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/17128
dc.subject Cosmological Constant en
dc.subject Accelerated Phase en
dc.subject Dark Matter en
dc.subject Present Day en
dc.subject.classification Astronomy & Astrophysics en
dc.subject.classification Physics, Multidisciplinary en
dc.subject.classification Physics, Particles & Fields en
dc.subject.other DIGITAL-SKY-SURVEY en
dc.subject.other MICROWAVE-ANISOTROPY-PROBE en
dc.subject.other HOMOGENEITY en
dc.title Cosmic acceleration driven by mirage inhomogeneities en
heal.type journalArticle en
heal.identifier.primary 10.1088/0264-9381/23/6/010 en
heal.identifier.secondary http://dx.doi.org/10.1088/0264-9381/23/6/010 en
heal.language English en
heal.publicationDate 2006 en
heal.abstract A cosmological model based on an inhomogeneous D3-brane moving in an AdS5 × S5 bulk is introduced. Although there are no special points in the bulk, the brane universe has a centre and is isotropic around it. The model has an accelerating expansion and its effective cosmological constant is inversely proportional to the distance from the centre, giving a possible geometrical origin for the smallness of a present-day cosmological constant. Besides, if our model is considered as an alternative of early-time acceleration, it is shown that the early stage accelerating phase ends in a dust-dominated FRW homogeneous universe. Mirage-driven acceleration thus provides a dark matter component for the brane universe final state. We finally show that the model fulfils the current constraints on inhomogeneities. © 2006 IOP Publishing Ltd. en
heal.publisher IOP PUBLISHING LTD en
heal.journalName Classical and Quantum Gravity en
dc.identifier.doi 10.1088/0264-9381/23/6/010 en
dc.identifier.isi ISI:000237458400010 en
dc.identifier.volume 23 en
dc.identifier.issue 6 en
dc.identifier.spage 1999 en
dc.identifier.epage 2010 en


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