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 |