Cosmic vector for dark energy: Constraints from supernovae, cosmic microwave background, and baryon acoustic oscillations

It has been recently shown that the presence of a vector field over cosmological scales could explain the observed accelerated expansion of the Universe without introducing either new scales or unnatural initial conditions in the early Universe, thus avoiding the coincidence problem. Here, we presen...

Descripción completa

Detalles Bibliográficos
Autores: López Maroto, Antonio, Beltrán Jiménez, José, Lazkoz, Ruth
Tipo de recurso: artículo
Fecha de publicación:2009
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/44341
Acceso en línea:https://hdl.handle.net/20.500.14352/44341
Access Level:acceso abierto
Palabra clave:53
Probe Wmap Observations
Equation-of-State
Cosmology
Constant
Lambda
Space
Física (Física)
22 Física
id ES_340cb36c6f09d0bfc86ecb30fafbcf6e
oai_identifier_str oai:docta.ucm.es:20.500.14352/44341
network_acronym_str ES
network_name_str España
repository_id_str
spelling Cosmic vector for dark energy: Constraints from supernovae, cosmic microwave background, and baryon acoustic oscillationsLópez Maroto, AntonioBeltrán Jiménez, JoséLazkoz, Ruth53Probe Wmap ObservationsEquation-of-StateCosmologyConstantLambdaSpaceFísica (Física)22 FísicaIt has been recently shown that the presence of a vector field over cosmological scales could explain the observed accelerated expansion of the Universe without introducing either new scales or unnatural initial conditions in the early Universe, thus avoiding the coincidence problem. Here, we present a detailed analysis of the constraints imposed by supernova type Ia (SNIa), cosmic microwave background (CMB), and baryon acoustic oscillation (BAO) data on the vector dark energy model with general spatial curvature. We find that contrary to standard cosmology, CMB data exclude a flat universe for this model and, in fact, predict a closed geometry for the spatial sections. We see that CMB and SNIa Gold data are perfectly compatible at the 1-sigma level, however the SNIa Union data set exhibits a 3-sigma tension with CMB. The same level of tension is also found between SNIa and BAO measurements.Amer Physical SocUniversidad Complutense de Madrid20092009-07-0120092009-07-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/44341reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/443412026-06-02T12:44:21Z
dc.title.none.fl_str_mv Cosmic vector for dark energy: Constraints from supernovae, cosmic microwave background, and baryon acoustic oscillations
title Cosmic vector for dark energy: Constraints from supernovae, cosmic microwave background, and baryon acoustic oscillations
spellingShingle Cosmic vector for dark energy: Constraints from supernovae, cosmic microwave background, and baryon acoustic oscillations
López Maroto, Antonio
53
Probe Wmap Observations
Equation-of-State
Cosmology
Constant
Lambda
Space
Física (Física)
22 Física
title_short Cosmic vector for dark energy: Constraints from supernovae, cosmic microwave background, and baryon acoustic oscillations
title_full Cosmic vector for dark energy: Constraints from supernovae, cosmic microwave background, and baryon acoustic oscillations
title_fullStr Cosmic vector for dark energy: Constraints from supernovae, cosmic microwave background, and baryon acoustic oscillations
title_full_unstemmed Cosmic vector for dark energy: Constraints from supernovae, cosmic microwave background, and baryon acoustic oscillations
title_sort Cosmic vector for dark energy: Constraints from supernovae, cosmic microwave background, and baryon acoustic oscillations
dc.creator.none.fl_str_mv López Maroto, Antonio
Beltrán Jiménez, José
Lazkoz, Ruth
author López Maroto, Antonio
author_facet López Maroto, Antonio
Beltrán Jiménez, José
Lazkoz, Ruth
author_role author
author2 Beltrán Jiménez, José
Lazkoz, Ruth
author2_role author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 53
Probe Wmap Observations
Equation-of-State
Cosmology
Constant
Lambda
Space
Física (Física)
22 Física
topic 53
Probe Wmap Observations
Equation-of-State
Cosmology
Constant
Lambda
Space
Física (Física)
22 Física
description It has been recently shown that the presence of a vector field over cosmological scales could explain the observed accelerated expansion of the Universe without introducing either new scales or unnatural initial conditions in the early Universe, thus avoiding the coincidence problem. Here, we present a detailed analysis of the constraints imposed by supernova type Ia (SNIa), cosmic microwave background (CMB), and baryon acoustic oscillation (BAO) data on the vector dark energy model with general spatial curvature. We find that contrary to standard cosmology, CMB data exclude a flat universe for this model and, in fact, predict a closed geometry for the spatial sections. We see that CMB and SNIa Gold data are perfectly compatible at the 1-sigma level, however the SNIa Union data set exhibits a 3-sigma tension with CMB. The same level of tension is also found between SNIa and BAO measurements.
publishDate 2009
dc.date.none.fl_str_mv 2009
2009-07-01
2009
2009-07-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/44341
url https://hdl.handle.net/20.500.14352/44341
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Amer Physical Soc
publisher.none.fl_str_mv Amer Physical Soc
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869405785862176768
score 15,300724

Similares en LA Referencia