New observational constraints on interacting dark energy using galaxy clusters virial equilibrium states

Detalhes bibliográficos
Autor(a) principal: Le Delliou, M. [UNESP]
Data de Publicação: 2019
Outros Autores: Marcondes, R. J.F., Lima Neto, G. B.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1093/mnras/stz2757
http://hdl.handle.net/11449/200079
Resumo: The nature of the dark sector components of the Universe still remains one of the largest unknown. Among many possibilities, it has been speculated that dark matter and dark energy may be more tightly coupled than usually thought, one component interacting with the other. Here, we continue to explore the possible dark sector interaction through means of the Layzer-Irvine equation together with a model of an interacting dark sector applied to clusters of galaxies. We have selected galaxy clusters that have their mass profiles determined by gravitational lensing effect (optical observations) and have their intracluster gas temperatures measured from X-ray observations and spectral fit found in the literature. Using a simple model based on semi-analytical simulations, we derived a putative dynamical evolution of the clusters and used it to estimate the coupling parameter of the dark sector interaction. Through a Bayesian analysis, we obtain a 3σ detection of the interaction strength for 11 clusters at −0.027 ± 0.009 that translates in a compounded Universal equilibrium virial ratio, U/T, of −0.61+0.04−0.03. We note that the X-ray temperature determination is sometimes inconsistent, depending on the instrument and/or methodology used. The level of detection and these inconsistencies call for caution. We expect that future observations will give us a clearer indication of an eventual dark sector interaction.
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spelling New observational constraints on interacting dark energy using galaxy clusters virial equilibrium statesCosmology: theoryDark energyDark matterGalaxies: clusters: generalGravitationLarge-scale structure of UniverseThe nature of the dark sector components of the Universe still remains one of the largest unknown. Among many possibilities, it has been speculated that dark matter and dark energy may be more tightly coupled than usually thought, one component interacting with the other. Here, we continue to explore the possible dark sector interaction through means of the Layzer-Irvine equation together with a model of an interacting dark sector applied to clusters of galaxies. We have selected galaxy clusters that have their mass profiles determined by gravitational lensing effect (optical observations) and have their intracluster gas temperatures measured from X-ray observations and spectral fit found in the literature. Using a simple model based on semi-analytical simulations, we derived a putative dynamical evolution of the clusters and used it to estimate the coupling parameter of the dark sector interaction. Through a Bayesian analysis, we obtain a 3σ detection of the interaction strength for 11 clusters at −0.027 ± 0.009 that translates in a compounded Universal equilibrium virial ratio, U/T, of −0.61+0.04−0.03. We note that the X-ray temperature determination is sometimes inconsistent, depending on the instrument and/or methodology used. The level of detection and these inconsistencies call for caution. We expect that future observations will give us a clearer indication of an eventual dark sector interaction.Institute of Theoretical Physics School of Physical Science and Technology Lanzhou University, No. 222, South Tianshui RoadInstituto de Astrofísica e Ciências do Espaço Universidade de Lisboa Faculdade de Ciências, Ed. C8, Campo GrandeInstituto de Física Teórica Universidade Estadual de São Paulo (IFT-UNESP), Rua Dr. Bento Teobaldo Ferraz 271, Bloco 2 - Barra FundaInstituto de Física Universidade de São Paulo Cidade Universitária, Rua do Matão 1371Instituto de Astronomia Geofísica e Ciências Atmosféricas Universidade de São Paulo, Rua do Matão 1226, Cidade UniversitáriaInstituto de Física Teórica Universidade Estadual de São Paulo (IFT-UNESP), Rua Dr. Bento Teobaldo Ferraz 271, Bloco 2 - Barra FundaLanzhou UniversityFaculdade de CiênciasUniversidade Estadual Paulista (Unesp)Universidade de São Paulo (USP)Le Delliou, M. [UNESP]Marcondes, R. J.F.Lima Neto, G. B.2020-12-12T01:57:10Z2020-12-12T01:57:10Z2019-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1944-1952http://dx.doi.org/10.1093/mnras/stz2757Monthly Notices of the Royal Astronomical Society, v. 490, n. 2, p. 1944-1952, 2019.1365-29660035-8711http://hdl.handle.net/11449/20007910.1093/mnras/stz27572-s2.0-85079619772Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMonthly Notices of the Royal Astronomical Societyinfo:eu-repo/semantics/openAccess2021-10-23T11:59:32Zoai:repositorio.unesp.br:11449/200079Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:34:02.031400Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv New observational constraints on interacting dark energy using galaxy clusters virial equilibrium states
title New observational constraints on interacting dark energy using galaxy clusters virial equilibrium states
spellingShingle New observational constraints on interacting dark energy using galaxy clusters virial equilibrium states
Le Delliou, M. [UNESP]
Cosmology: theory
Dark energy
Dark matter
Galaxies: clusters: general
Gravitation
Large-scale structure of Universe
title_short New observational constraints on interacting dark energy using galaxy clusters virial equilibrium states
title_full New observational constraints on interacting dark energy using galaxy clusters virial equilibrium states
title_fullStr New observational constraints on interacting dark energy using galaxy clusters virial equilibrium states
title_full_unstemmed New observational constraints on interacting dark energy using galaxy clusters virial equilibrium states
title_sort New observational constraints on interacting dark energy using galaxy clusters virial equilibrium states
author Le Delliou, M. [UNESP]
author_facet Le Delliou, M. [UNESP]
Marcondes, R. J.F.
Lima Neto, G. B.
author_role author
author2 Marcondes, R. J.F.
Lima Neto, G. B.
author2_role author
author
dc.contributor.none.fl_str_mv Lanzhou University
Faculdade de Ciências
Universidade Estadual Paulista (Unesp)
Universidade de São Paulo (USP)
dc.contributor.author.fl_str_mv Le Delliou, M. [UNESP]
Marcondes, R. J.F.
Lima Neto, G. B.
dc.subject.por.fl_str_mv Cosmology: theory
Dark energy
Dark matter
Galaxies: clusters: general
Gravitation
Large-scale structure of Universe
topic Cosmology: theory
Dark energy
Dark matter
Galaxies: clusters: general
Gravitation
Large-scale structure of Universe
description The nature of the dark sector components of the Universe still remains one of the largest unknown. Among many possibilities, it has been speculated that dark matter and dark energy may be more tightly coupled than usually thought, one component interacting with the other. Here, we continue to explore the possible dark sector interaction through means of the Layzer-Irvine equation together with a model of an interacting dark sector applied to clusters of galaxies. We have selected galaxy clusters that have their mass profiles determined by gravitational lensing effect (optical observations) and have their intracluster gas temperatures measured from X-ray observations and spectral fit found in the literature. Using a simple model based on semi-analytical simulations, we derived a putative dynamical evolution of the clusters and used it to estimate the coupling parameter of the dark sector interaction. Through a Bayesian analysis, we obtain a 3σ detection of the interaction strength for 11 clusters at −0.027 ± 0.009 that translates in a compounded Universal equilibrium virial ratio, U/T, of −0.61+0.04−0.03. We note that the X-ray temperature determination is sometimes inconsistent, depending on the instrument and/or methodology used. The level of detection and these inconsistencies call for caution. We expect that future observations will give us a clearer indication of an eventual dark sector interaction.
publishDate 2019
dc.date.none.fl_str_mv 2019-12-01
2020-12-12T01:57:10Z
2020-12-12T01:57:10Z
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/10.1093/mnras/stz2757
Monthly Notices of the Royal Astronomical Society, v. 490, n. 2, p. 1944-1952, 2019.
1365-2966
0035-8711
http://hdl.handle.net/11449/200079
10.1093/mnras/stz2757
2-s2.0-85079619772
url http://dx.doi.org/10.1093/mnras/stz2757
http://hdl.handle.net/11449/200079
identifier_str_mv Monthly Notices of the Royal Astronomical Society, v. 490, n. 2, p. 1944-1952, 2019.
1365-2966
0035-8711
10.1093/mnras/stz2757
2-s2.0-85079619772
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Monthly Notices of the Royal Astronomical Society
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 1944-1952
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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