Phantom matter: a challenging solution to the cosmological tensions

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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Detalhes bibliográficos
Autores: Gómez Valent, Adrià, Solà Peracaula, Joan
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2024
País:España
Recursos:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/221137
Acesso em linha:https://hdl.handle.net/2445/221137
Access Level:acceso abierto
Palavra-chave:Energia fosca (Astronomia)
Cosmologia
Dark energy (Astronomy)
Cosmology
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spelling Phantom matter: a challenging solution to the cosmological tensionsGómez Valent, AdriàSolà Peracaula, JoanEnergia fosca (Astronomia)CosmologiaDark energy (Astronomy)CosmologyDespite 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)2024info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/221137Articles 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/ad7a62Astrophysical Journal, 2024, vol. 975, num.1https://doi.org/10.3847/1538-4357/ad7a62cc-by (c) Gómez Valent et al., 2024http://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/2211372026-05-27T06:46:51Z
dc.title.none.fl_str_mv Phantom matter: a challenging solution to the cosmological tensions
title Phantom matter: a challenging solution to the cosmological tensions
spellingShingle Phantom matter: a challenging solution to the cosmological tensions
Gómez Valent, Adrià
Energia fosca (Astronomia)
Cosmologia
Dark energy (Astronomy)
Cosmology
title_short Phantom matter: a challenging solution to the cosmological tensions
title_full Phantom matter: a challenging solution to the cosmological tensions
title_fullStr Phantom matter: a challenging solution to the cosmological tensions
title_full_unstemmed Phantom matter: a challenging solution to the cosmological tensions
title_sort Phantom matter: a challenging solution to the cosmological tensions
dc.creator.none.fl_str_mv Gómez Valent, Adrià
Solà Peracaula, Joan
author Gómez Valent, Adrià
author_facet Gómez Valent, Adrià
Solà Peracaula, Joan
author_role author
author2 Solà Peracaula, Joan
author2_role author
dc.subject.none.fl_str_mv Energia fosca (Astronomia)
Cosmologia
Dark energy (Astronomy)
Cosmology
topic Energia fosca (Astronomia)
Cosmologia
Dark energy (Astronomy)
Cosmology
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 2024
dc.date.none.fl_str_mv 2024
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/2445/221137
url https://hdl.handle.net/2445/221137
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/ad7a62
Astrophysical Journal, 2024, vol. 975, num.1
https://doi.org/10.3847/1538-4357/ad7a62
dc.rights.none.fl_str_mv cc-by (c) Gómez Valent et al., 2024
http://creativecommons.org/licenses/by/3.0/es/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Gómez Valent et al., 2024
http://creativecommons.org/licenses/by/3.0/es/
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 15.812429

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