Decaying vacuum cosmology and its scalar field description

Autor(es)

Andrade-Oliveira, F. ^[1] ; Costa, F. E. M. ^{[1, 2]} ; Lima, J. A. S. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Astron, BR-05508900 Sao Paulo - Brazil

^[2] Univ Fed Rural Semi Arido, BR-59900000 Pau Dos Ferros, RN - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Classical and Quantum Gravity; v. 31, n. 4 FEB 2014.
• Citações Web of Science: 6

Resumo

We discuss the cosmological consequences of an interacting model in the dark sector in which the A component evolves as a truncated power series of the Hubble parameter. We also discuss some of the thermodynamic features of this model. In order to constrain the free parameters of the model we carry out a joint statistical analysis involving observational data from current type Ia supernovae, recent estimates of the cosmic microwave background shift parameter and baryon acoustic oscillations measurements. Finally, we adopt a theoretical method to derive the coupled scalar field version for this non-equilibrium decaying vacuum accelerating cosmology. (AU)

• Processo FAPESP: 04/13668-0 - Cosmologia na era da precisão: energia escura, matéria escura e radiação cósmica de fundo
• Beneficiário: Jose Ademir Sales de Lima
• Modalidade de apoio: Auxílio à Pesquisa - Temático