Brane cosmology, Weyl fluid, and density perturbations

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dc.creatorPal, Supratik
dc.date2008-06-16
dc.date2008-06-27
dc.date.accessioned2026-07-07T11:51:42Z
dc.date.available2026-07-07T11:51:42Z
dc.descriptionWe develop a technique to study relativistic perturbations in the generalised brane cosmological scenario, which is a generalisation of the multi-fluid cosmological perturbations to brane cosmology. The novelty of the technique lies in the inclusion of a radiative bulk which is responsible for bulk-brane energy exchange, and in turn, modifies the standard perturbative analysis to a great extent. The analysis involves a geometric fluid -- called the Weyl fluid -- whose nature and role have been studied extensively both for the empty bulk and the radiative bulk scenario. Subsequently, we find that this Weyl fluid can be a possible geometric candidate for dark matter in this generalised brane cosmological framework.
dc.description18 pages, 1 figure, accepted for publication in Phys.Rev.D
dc.identifierhttps://arxiv.org/abs/0806.2505
dc.identifierhttp://arxiv.org/abs/0806.2505
dc.identifierPhys.Rev.D78:043517,2008
dc.identifierdoi:10.1103/PhysRevD.78.043517
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/203986
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Theory
dc.titleBrane cosmology, Weyl fluid, and density perturbations
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