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Type: Artigo de periódico
Title: Degenerate Fermi gas perturbations at standard background cosmology
Author: Bernardini, AE
Perico, ELD
Abstract: The hypothesis of a tiny fraction of the cosmic inventory evolving cosmologically as a degenerate Fermi gas test fluid at some dominant cosmological background is investigated. Our analytical results allow for performing preliminary computations to the evolution of perturbations for relativistic and non-relativistic test fluids. The density fluctuation, delta, the fluid velocity divergence, theta , and an explicit expression for the dynamics of the shear stress, sigma, are obtained for a degenerate Fermi gas in the background regime of radiation. Extensions to the dominance of matter and to the Lambda CDM cosmological background are also investigated and lessons concerning the formation of large structures of degenerate Fermi gas are depicted.
Subject: astrophysical fluid dynamics
semi-analytic modeling
cosmological neutrinos
Country: Inglaterra
Editor: Iop Publishing Ltd
Citation: Journal Of Cosmology And Astroparticle Physics. Iop Publishing Ltd, n. 1, 2011.
Rights: fechado
Identifier DOI: 10.1088/1475-7516/2011/01/010
Date Issue: 2011
Appears in Collections:Unicamp - Artigos e Outros Documentos

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