Artículos de revistas
DBI models for the unification of dark matter and dark energy
Fecha
2010-05Registro en:
Chimento, Luis Pascual; Lazkoz, Ruth; Sendra, Irene; DBI models for the unification of dark matter and dark energy; Springer/Plenum Publishers; General Relativity And Gravitation; 42; 5; 5-2010; 1189-1209
0001-7701
CONICET Digital
CONICET
Autor
Chimento, Luis Pascual
Lazkoz, Ruth
Sendra, Irene
Resumen
We propose a model based on a DBI action for the unification of dark matter and dark energy. This is supported by the results of the study of its background behavior at early and late times, and reinforced by the analysis of the evolution of perturbations. We also perform a Bayesian analysis to set observational constraints on the parameters of the model using type Ia SN, CMB shift and BAO data. Finally, to complete the study we investigate its kinematics aspects, such as the effective equation of state parameter, acceleration parameter and transition redshift. Particularizing those parameters for the best fit one appreciates that an effective phantom is preferred. © 2009 Springer Science+Business Media, LLC.