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DBI models for the unification of dark matter and dark energy

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Abstract

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.

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Authors and Affiliations

  1. Departamento de Física, Universidad de Buenos Aires, 1428, Buenos Aires, Argentina

    Luis P. Chimento

  2. Fisika Teorikoa, Zientzia eta Teknologia Fakultatea, Euskal Herriko Unibertsitatea, 644 Posta Kutxatila, 48080, Bilbao, Spain

    Ruth Lazkoz & Irene Sendra

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  1. Luis P. Chimento
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  2. Ruth Lazkoz
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  3. Irene Sendra
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Correspondence to Ruth Lazkoz.

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Chimento, L.P., Lazkoz, R. & Sendra, I. DBI models for the unification of dark matter and dark energy. Gen Relativ Gravit 42, 1189–1209 (2010). https://doi.org/10.1007/s10714-009-0901-z

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  • DOI: https://doi.org/10.1007/s10714-009-0901-z

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