Cosmic acceleration driven by mirage inhomogeneities

Galfard, C; Germani, C; Kehagias, A

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