First evidence of running cosmic vacuum: challenging the concordance model

Despite the fact that a rigid Λ-term is a fundamental building block of the concordance ΛCDM model, we show that a large class of cosmological scenarios with dynamical vacuum energy density ρΛ and/or gravitational coupling G, together with a possible non-conservation of matter, are capable of seriou...

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Detalles Bibliográficos
Autores: Solà Peracaula, Joan, Gómez Valent, Adrià, Cruz Pérez, Javier de
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2017
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/119632
Acceso en línea:https://hdl.handle.net/2445/119632
Access Level:acceso abierto
Palabra clave:Energia fosca (Astronomia)
Matèria fosca (Astronomia)
Dark energy (Astronomy)
Dark matter (Astronomy)
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spelling First evidence of running cosmic vacuum: challenging the concordance modelSolà Peracaula, JoanGómez Valent, AdriàCruz Pérez, Javier deEnergia fosca (Astronomia)Matèria fosca (Astronomia)Dark energy (Astronomy)Dark matter (Astronomy)Despite the fact that a rigid Λ-term is a fundamental building block of the concordance ΛCDM model, we show that a large class of cosmological scenarios with dynamical vacuum energy density ρΛ and/or gravitational coupling G, together with a possible non-conservation of matter, are capable of seriously challenging the traditional phenomenological success of the ΛCDM. In this paper, we discuss these 'running vacuum models' (RVM's), in which ρΛ=ρΛ(H) consists of a nonvanishing constant term and a series of powers of the Hubble rate. Such generic structure is potentially linked to the quantum field theoretical description of the expanding Universe. By performing an overall fit to the cosmological observables SNIa+BAO+H(z)+LSS+BBN+CMB (in which the WMAP9, Planck 2013 and Planck 2015 data are taken into account), we find that the class of RVM's appears significantly more favored than the ΛCDM, namely at an unprecedented level of ≳4.2σ. Furthermore, the Akaike and Bayesian information criteria confirm that the dynamical RVM's are strongly preferred as compared to the conventional rigid Λ-picture of the cosmic evolution.Institute of Physics (IOP)2017info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/119632Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.3847/1538-4357/836/1/43Astrophysical Journal, 2017, vol. 836, num. 1, p. 43-56https://doi.org/10.3847/1538-4357/836/1/43(c) American Astronomical Society, 2017info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1196322026-05-27T06:46:51Z
dc.title.none.fl_str_mv First evidence of running cosmic vacuum: challenging the concordance model
title First evidence of running cosmic vacuum: challenging the concordance model
spellingShingle First evidence of running cosmic vacuum: challenging the concordance model
Solà Peracaula, Joan
Energia fosca (Astronomia)
Matèria fosca (Astronomia)
Dark energy (Astronomy)
Dark matter (Astronomy)
title_short First evidence of running cosmic vacuum: challenging the concordance model
title_full First evidence of running cosmic vacuum: challenging the concordance model
title_fullStr First evidence of running cosmic vacuum: challenging the concordance model
title_full_unstemmed First evidence of running cosmic vacuum: challenging the concordance model
title_sort First evidence of running cosmic vacuum: challenging the concordance model
dc.creator.none.fl_str_mv Solà Peracaula, Joan
Gómez Valent, Adrià
Cruz Pérez, Javier de
author Solà Peracaula, Joan
author_facet Solà Peracaula, Joan
Gómez Valent, Adrià
Cruz Pérez, Javier de
author_role author
author2 Gómez Valent, Adrià
Cruz Pérez, Javier de
author2_role author
author
dc.subject.none.fl_str_mv Energia fosca (Astronomia)
Matèria fosca (Astronomia)
Dark energy (Astronomy)
Dark matter (Astronomy)
topic Energia fosca (Astronomia)
Matèria fosca (Astronomia)
Dark energy (Astronomy)
Dark matter (Astronomy)
description Despite the fact that a rigid Λ-term is a fundamental building block of the concordance ΛCDM model, we show that a large class of cosmological scenarios with dynamical vacuum energy density ρΛ and/or gravitational coupling G, together with a possible non-conservation of matter, are capable of seriously challenging the traditional phenomenological success of the ΛCDM. In this paper, we discuss these 'running vacuum models' (RVM's), in which ρΛ=ρΛ(H) consists of a nonvanishing constant term and a series of powers of the Hubble rate. Such generic structure is potentially linked to the quantum field theoretical description of the expanding Universe. By performing an overall fit to the cosmological observables SNIa+BAO+H(z)+LSS+BBN+CMB (in which the WMAP9, Planck 2013 and Planck 2015 data are taken into account), we find that the class of RVM's appears significantly more favored than the ΛCDM, namely at an unprecedented level of ≳4.2σ. Furthermore, the Akaike and Bayesian information criteria confirm that the dynamical RVM's are strongly preferred as compared to the conventional rigid Λ-picture of the cosmic evolution.
publishDate 2017
dc.date.none.fl_str_mv 2017
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/119632
url https://hdl.handle.net/2445/119632
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.3847/1538-4357/836/1/43
Astrophysical Journal, 2017, vol. 836, num. 1, p. 43-56
https://doi.org/10.3847/1538-4357/836/1/43
dc.rights.none.fl_str_mv (c) American Astronomical Society, 2017
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) American Astronomical Society, 2017
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Institute of Physics (IOP)
publisher.none.fl_str_mv Institute of Physics (IOP)
dc.source.none.fl_str_mv Articles publicats en revistes (Física Quàntica i Astrofísica)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.300719

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