New observational constraints on interacting dark energy using galaxy clusters virial equilibrium states
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , |
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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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 |
|
_version_ |
1808128671396921344 |