Use este identificador para citar ou linkar para este item:
https://repositorio.ufba.br/handle/ri/13898
Tipo: | Artigo de Periódico |
Título: | Evolution of density perturbations in decaying vacuum cosmology: the case of nonzero perturbations in the cosmological term |
Título(s) alternativo(s): | Physical Review D |
Autor(es): | Borges, H. A. Carneiro, Saulo Fabris, J. C. |
Autor(es): | Borges, H. A. Carneiro, Saulo Fabris, J. C. |
Abstract: | We extend the results of a previous paper where a model of interacting dark energy, with a cosmological term decaying linearly with the Hubble parameter, is tested against the observed mass power spectrum. In spite of the agreement with observations of type Ia supernovas, baryonic acoustic oscillations, and the cosmic microwave background, we had shown previously that no good concordance is achieved if we include the mass power spectrum. However, our analysis was based on the ad hoc assumption that the interacting cosmological term is strictly homogeneous. Now we perform a more complete analysis, by perturbing such a term. Although our conclusions are still based on a particular, scale-invariant choice of the primordial spectrum of dark energy perturbations, we show that a cosmological term decaying linearly with the Hubble parameter is indeed disfavored as compared to the standard model. |
País: | Brasil |
Tipo de Acesso: | Acesso Aberto |
URI: | http://repositorio.ufba.br/ri/handle/ri/13898 |
Data do documento: | 2008 |
Aparece nas coleções: | Artigo Publicado em Periódico (FIS) |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
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PhysRevD.78.123522.pdf | 183,24 kB | Adobe PDF | Visualizar/Abrir |
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