Can inhomogeneties accelerate the cosmic volume expansion?

Simple item page
dc.creatorKai, Tomohiro
dc.creatorKozaki, Hiroshi
dc.creatornakao, Ken-ichi
dc.creatorNambu, Yasusada
dc.creatorYoo, Chul-Moon
dc.date2006-05-22
dc.date2007-02-28
dc.date.accessioned2026-07-07T10:40:53Z
dc.date.available2026-07-07T10:40:53Z
dc.descriptionIf expanding and contracting regions coexist in the universe, the speed of the cosmic volume expansion can be accelerated. We construct simple inhomogeneous dust-filled universe models in which the speed of the cosmic volume expansion is accelerated for finite periods. These models are constructed by removing spherical domains from the Einstein-de Sitter universe and filling each domain with a Lemaitre-Tolman-Bondi dust sphere possessing the same gravitational mass as the removed region. This represents an exact solution of the Einstein equations. We find that acceleration of the cosmic volume expansion is realized in some cases when the size of the contracting region is comparable to the horizon radius of the Einstein-de Sitter universe though this model is very different from the universe observed today. This result implies that non-linear general relativistic effects of inhomogeneities are very important to realize the acceleration of the cosmic volume expansion.
dc.description12 pages,5 figures. version published in Progress of Theoretical Physics
dc.identifierhttps://arxiv.org/abs/gr-qc/0605120
dc.identifierhttp://arxiv.org/abs/gr-qc/0605120
dc.identifierProg.Theor.Phys.117:229-240,2007
dc.identifierdoi:10.1143/PTP.117.229
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/181466
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleCan inhomogeneties accelerate the cosmic volume expansion?
dc.typetext

Files

Collections

arXiv