Inhomogeneity-Induced Cosmic Acceleration in a Dust Universe

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dc.creatorChuang, Chia-Hsun
dc.creatorGu, Je-An
dc.creatorHwang, W-Y. P.
dc.date2005-12-30
dc.date2008-08-21
dc.date.accessioned2026-07-07T11:57:18Z
dc.date.available2026-07-07T11:57:18Z
dc.descriptionIt is the common consensus that the expansion of a universe always slows down if the gravity provided by the energy sources therein is attractive and accordingly one needs to invoke dark energy as a source of anti-gravity for understanding the cosmic acceleration. To examine this point we find counter-examples for a spherically symmetric dust fluid described by the Lemaitre-Tolman-Bondi solution without singularity. Thus, the validity of this naive consensus is indeed doubtful and the effects of inhomogeneities should be restudied. These counter-intuitive examples open a new perspective on the understanding of the evolution of our universe.
dc.description41 pages, 12 figures, 4 tables; final version for publication
dc.identifierhttps://arxiv.org/abs/astro-ph/0512651
dc.identifierhttp://arxiv.org/abs/astro-ph/0512651
dc.identifierClass.Quant.Grav.25:175001,2008
dc.identifierdoi:10.1088/0264-9381/25/17/175001
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/205834
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleInhomogeneity-Induced Cosmic Acceleration in a Dust Universe
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