Can dark matter–dark energy interaction alleviate the cosmic coincidence problem?

Detalhes bibliográficos
Autor(a) principal: Jesus, J. F. [UNESP]
Data de Publicação: 2022
Outros Autores: Escobal, A. A. [UNESP], Benndorf, D. [UNESP], Pereira, S. H. [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1140/epjc/s10052-022-10234-y
http://hdl.handle.net/11449/230664
Resumo: In this paper we study a model of interacting dark energy–dark matter where the ratio between these components is not constant, changing from early to late times in such a way that the model can solve or alleviate the cosmic coincidence problem (CP). The interaction arises from an assumed relation of the form ρx∝ρdα, where ρx and ρd are the energy densities of dark energy and dark matter components, respectively, and α is a free parameter. For a dark energy equation of state parameter w= - 1 we found that, if α= 0 , the standard Λ CDM model is recovered, where the coincidence problem is unsolved. For 0 < α< 1 , the CP would be alleviated and for α∼ 1 , the CP would be solved. The dark energy component is analyzed with both w= - 1 and w≠ - 1. Using Supernovae type Ia and Hubble parameter data constraints, in the case w= - 1 we find α=0.109-0.072+0.062 at 68% C.L., and the CP is alleviated. For w≠ - 1 , a degeneracy arises on the w–α plane. In order to break such degeneracy we add cosmic microwave background distance priors and baryonic acoustic oscillations data to the constraints, yielding α= - 0.075 ± 0.046 at 68% C.L. In this case we find that the CP is not alleviated even for 2σ interval for α. Furthermore, this last model is discarded against flat Λ CDM according to BIC analysis.
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spelling Can dark matter–dark energy interaction alleviate the cosmic coincidence problem?In this paper we study a model of interacting dark energy–dark matter where the ratio between these components is not constant, changing from early to late times in such a way that the model can solve or alleviate the cosmic coincidence problem (CP). The interaction arises from an assumed relation of the form ρx∝ρdα, where ρx and ρd are the energy densities of dark energy and dark matter components, respectively, and α is a free parameter. For a dark energy equation of state parameter w= - 1 we found that, if α= 0 , the standard Λ CDM model is recovered, where the coincidence problem is unsolved. For 0 < α< 1 , the CP would be alleviated and for α∼ 1 , the CP would be solved. The dark energy component is analyzed with both w= - 1 and w≠ - 1. Using Supernovae type Ia and Hubble parameter data constraints, in the case w= - 1 we find α=0.109-0.072+0.062 at 68% C.L., and the CP is alleviated. For w≠ - 1 , a degeneracy arises on the w–α plane. In order to break such degeneracy we add cosmic microwave background distance priors and baryonic acoustic oscillations data to the constraints, yielding α= - 0.075 ± 0.046 at 68% C.L. In this case we find that the CP is not alleviated even for 2σ interval for α. Furthermore, this last model is discarded against flat Λ CDM according to BIC analysis.Instituto de Ciências e Engenharia Universidade Estadual Paulista (UNESP), R. Geraldo Alckmin 519, SPDepartamento de Física Faculdade de Engenharia de Guaratinguetá Universidade Estadual Paulista (UNESP), Av. Dr. Ariberto Pereira da Cunha 333, SPInstituto de Ciências e Engenharia Universidade Estadual Paulista (UNESP), R. Geraldo Alckmin 519, SPDepartamento de Física Faculdade de Engenharia de Guaratinguetá Universidade Estadual Paulista (UNESP), Av. Dr. Ariberto Pereira da Cunha 333, SPUniversidade Estadual Paulista (UNESP)Jesus, J. F. [UNESP]Escobal, A. A. [UNESP]Benndorf, D. [UNESP]Pereira, S. H. [UNESP]2022-04-29T08:41:25Z2022-04-29T08:41:25Z2022-03-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1140/epjc/s10052-022-10234-yEuropean Physical Journal C, v. 82, n. 3, 2022.1434-60521434-6044http://hdl.handle.net/11449/23066410.1140/epjc/s10052-022-10234-y2-s2.0-85127416496Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengEuropean Physical Journal Cinfo:eu-repo/semantics/openAccess2024-07-01T20:52:17Zoai:repositorio.unesp.br:11449/230664Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T18:02:14.688444Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Can dark matter–dark energy interaction alleviate the cosmic coincidence problem?
title Can dark matter–dark energy interaction alleviate the cosmic coincidence problem?
spellingShingle Can dark matter–dark energy interaction alleviate the cosmic coincidence problem?
Jesus, J. F. [UNESP]
title_short Can dark matter–dark energy interaction alleviate the cosmic coincidence problem?
title_full Can dark matter–dark energy interaction alleviate the cosmic coincidence problem?
title_fullStr Can dark matter–dark energy interaction alleviate the cosmic coincidence problem?
title_full_unstemmed Can dark matter–dark energy interaction alleviate the cosmic coincidence problem?
title_sort Can dark matter–dark energy interaction alleviate the cosmic coincidence problem?
author Jesus, J. F. [UNESP]
author_facet Jesus, J. F. [UNESP]
Escobal, A. A. [UNESP]
Benndorf, D. [UNESP]
Pereira, S. H. [UNESP]
author_role author
author2 Escobal, A. A. [UNESP]
Benndorf, D. [UNESP]
Pereira, S. H. [UNESP]
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (UNESP)
dc.contributor.author.fl_str_mv Jesus, J. F. [UNESP]
Escobal, A. A. [UNESP]
Benndorf, D. [UNESP]
Pereira, S. H. [UNESP]
description In this paper we study a model of interacting dark energy–dark matter where the ratio between these components is not constant, changing from early to late times in such a way that the model can solve or alleviate the cosmic coincidence problem (CP). The interaction arises from an assumed relation of the form ρx∝ρdα, where ρx and ρd are the energy densities of dark energy and dark matter components, respectively, and α is a free parameter. For a dark energy equation of state parameter w= - 1 we found that, if α= 0 , the standard Λ CDM model is recovered, where the coincidence problem is unsolved. For 0 < α< 1 , the CP would be alleviated and for α∼ 1 , the CP would be solved. The dark energy component is analyzed with both w= - 1 and w≠ - 1. Using Supernovae type Ia and Hubble parameter data constraints, in the case w= - 1 we find α=0.109-0.072+0.062 at 68% C.L., and the CP is alleviated. For w≠ - 1 , a degeneracy arises on the w–α plane. In order to break such degeneracy we add cosmic microwave background distance priors and baryonic acoustic oscillations data to the constraints, yielding α= - 0.075 ± 0.046 at 68% C.L. In this case we find that the CP is not alleviated even for 2σ interval for α. Furthermore, this last model is discarded against flat Λ CDM according to BIC analysis.
publishDate 2022
dc.date.none.fl_str_mv 2022-04-29T08:41:25Z
2022-04-29T08:41:25Z
2022-03-01
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1140/epjc/s10052-022-10234-y
European Physical Journal C, v. 82, n. 3, 2022.
1434-6052
1434-6044
http://hdl.handle.net/11449/230664
10.1140/epjc/s10052-022-10234-y
2-s2.0-85127416496
url http://dx.doi.org/10.1140/epjc/s10052-022-10234-y
http://hdl.handle.net/11449/230664
identifier_str_mv European Physical Journal C, v. 82, n. 3, 2022.
1434-6052
1434-6044
10.1140/epjc/s10052-022-10234-y
2-s2.0-85127416496
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv European Physical Journal C
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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