DBI models for the unification of dark matter and dark energy

Understand

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.