DBI models for the unification of dark matter and dark energy

Mostrar todas las versiones(2)

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...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Chimento, L.P., Lazkoz, R., Sendra, I.
Formato: JOUR
Materias:
Cosmological perturbations
Dark energy
Dark matter
DBI Lagrangians
Geometrical constraints
Acceso en línea: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 todo:paper_00017701_v42_n5_p1189_Chimento
record_format dspace
spelling todo:paper_00017701_v42_n5_p1189_Chimento2023-10-03T13:52:07Z DBI models for the unification of dark matter and dark energy Chimento, L.P. Lazkoz, R. Sendra, I. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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
Chimento, L.P.
Lazkoz, R.
Sendra, I.
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.
format JOUR
author Chimento, L.P.
Lazkoz, R.
Sendra, I.
author_facet Chimento, L.P.
Lazkoz, R.
Sendra, I.
author_sort Chimento, L.P.
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
url http://hdl.handle.net/20.500.12110/paper_00017701_v42_n5_p1189_Chimento
work_keys_str_mv AT chimentolp dbimodelsfortheunificationofdarkmatteranddarkenergy
AT lazkozr dbimodelsfortheunificationofdarkmatteranddarkenergy
AT sendrai dbimodelsfortheunificationofdarkmatteranddarkenergy
_version_ 1782029773795491840

Ejemplares similares