DBI models for the unification of dark matter and dark energy

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...

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Detalles Bibliográficos
Publicado: 2010
Materias:
Cosmological perturbations
Dark energy
Dark matter
DBI Lagrangians
Geometrical constraints
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00017701_v42_n5_p1189_Chimento
http://hdl.handle.net/20.500.12110/paper_00017701_v42_n5_p1189_Chimento
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00017701_v42_n5_p1189_Chimento
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spelling paper:paper_00017701_v42_n5_p1189_Chimento2023-06-08T14:21:37Z DBI models for the unification of dark matter and dark energy Cosmological perturbations Dark energy Dark matter DBI Lagrangians Geometrical constraints 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. 2010 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00017701_v42_n5_p1189_Chimento http://hdl.handle.net/20.500.12110/paper_00017701_v42_n5_p1189_Chimento
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Cosmological perturbations
Dark energy
Dark matter
DBI Lagrangians
Geometrical constraints
spellingShingle Cosmological perturbations
Dark energy
Dark matter
DBI Lagrangians
Geometrical constraints
DBI models for the unification of dark matter and dark energy
topic_facet Cosmological perturbations
Dark energy
Dark matter
DBI Lagrangians
Geometrical constraints
description 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.
title DBI models for the unification of dark matter and dark energy
title_short DBI models for the unification of dark matter and dark energy
title_full DBI models for the unification of dark matter and dark energy
title_fullStr DBI models for the unification of dark matter and dark energy
title_full_unstemmed DBI models for the unification of dark matter and dark energy
title_sort dbi models for the unification of dark matter and dark energy
publishDate 2010
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00017701_v42_n5_p1189_Chimento
http://hdl.handle.net/20.500.12110/paper_00017701_v42_n5_p1189_Chimento
_version_ 1768543921910054912

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