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https://repositorio.ufba.br/handle/ri/16050
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Campo DC | Valor | Idioma |
---|---|---|
dc.contributor.author | Carneiro, Saulo | - |
dc.contributor.author | Borges, H. A. | - |
dc.contributor.author | Zimdahl, W. | - |
dc.contributor.author | Fabris, J. C. | - |
dc.contributor.author | Ricaldi, W. S. Hipólito | - |
dc.creator | Carneiro, Saulo | - |
dc.creator | Borges, H. A. | - |
dc.creator | Zimdahl, W. | - |
dc.creator | Fabris, J. C. | - |
dc.creator | Ricaldi, W. S. Hipólito | - |
dc.date.accessioned | 2014-09-11T17:39:47Z | - |
dc.date.issued | 2011 | - |
dc.identifier.issn | 1475-7516 | - |
dc.identifier.uri | http://repositorio.ufba.br/ri/handle/ri/16050 | - |
dc.description | Texto completo: acesso restrito. p. 1-18 | pt_BR |
dc.description.abstract | We investigate a spatially flat Friedmann-Lemaˆıtre-Robertson-Walker cosmology in which a decaying vacuum term causes matter production at late times. Assuming a decay proportional to the Hubble rate, the ratio of the background energy densities of dark matter and dark energy changes with the cosmic scale factor as a−3/2. The intrinsically non-adiabatic two-component perturbation dynamics of this model is reduced to a single second-order equation. Perturbations of the vacuum term are shown to be negligible on scales that are relevant for structure formation. On larger scales, dark-energy perturbations give a somewhat higher contribution but remain always smaller than the dark-matter perturbations. | pt_BR |
dc.language.iso | en | pt_BR |
dc.rights | Acesso Aberto | pt_BR |
dc.source | http://dx.doi.org/ doi:10.1088/1475-7516/2011/04/028 | pt_BR |
dc.subject | Galaxy clustering | pt_BR |
dc.subject | Dark matter theory | pt_BR |
dc.subject | Dark energy theory | pt_BR |
dc.title | Non-adiabatic perturbations in decaying vacuum cosmology | pt_BR |
dc.title.alternative | Journal of Cosmology and Astroparticle Physics | pt_BR |
dc.type | Artigo de Periódico | pt_BR |
dc.identifier.number | sem v. | pt_BR |
dc.embargo.liftdate | 10000-01-01 | - |
Aparece nas coleções: | Artigo Publicado em Periódico (FIS) |
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