A low Hubble constant from galaxy distribution observations
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1088/1475-7516/2020/09/053 http://hdl.handle.net/11449/206677 |
Resumo: | An accurate determination of the Hubble constant remains a puzzle in observational cosmology. The possibility of a new physics has emerged with a significant tension between the current expansion rate of our Universe measured from the cosmic microwave background by the Planck satellite and from local methods. In this paper, new tight estimates on this parameter are obtained by considering two data sets from galaxy distribution observations: galaxy cluster gas mass fractions and baryon acoustic oscillation measurements. Priors from the Big Bang nucleosynthesis (BBN) were also considered. By considering the flat ΛCDM and XCDM models, and the non-flat ΛCDM model, our main results are: H0 = 65.9+1−155 km s−1 Mpc−1, H0 = 65.9+4−4.04 km s−1 Mpc−1 and H0 = 64.3+4−454 km s−1 Mpc−1 in 2σ c.l., respectively. These estimates are in full agreement with the Planck satellite results. Our analyses in these cosmological scenarios also support a negative value for the deceleration parameter at least in 3σ c.l.. |
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Repositório Institucional da UNESP |
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A low Hubble constant from galaxy distribution observationsBaryon acoustic oscillationsGalaxy clustersAn accurate determination of the Hubble constant remains a puzzle in observational cosmology. The possibility of a new physics has emerged with a significant tension between the current expansion rate of our Universe measured from the cosmic microwave background by the Planck satellite and from local methods. In this paper, new tight estimates on this parameter are obtained by considering two data sets from galaxy distribution observations: galaxy cluster gas mass fractions and baryon acoustic oscillation measurements. Priors from the Big Bang nucleosynthesis (BBN) were also considered. By considering the flat ΛCDM and XCDM models, and the non-flat ΛCDM model, our main results are: H0 = 65.9+1−155 km s−1 Mpc−1, H0 = 65.9+4−4.04 km s−1 Mpc−1 and H0 = 64.3+4−454 km s−1 Mpc−1 in 2σ c.l., respectively. These estimates are in full agreement with the Planck satellite results. Our analyses in these cosmological scenarios also support a negative value for the deceleration parameter at least in 3σ c.l..Departamento de Física Teórica e Experimental Universidade Federal do Rio Grande do NorteEscola CAIC José Joffily Secretaria da Educação e da Ciência e Tecnologia Governo da ParaíbaDepartamento de Física e Química Universidade Estadual Paulista (UNESP) Faculdade de Engenharia de Guaratinguetá, Av. Ariberto Pereira da CunhaDepartamento de Física e Química Universidade Estadual Paulista (UNESP) Faculdade de Engenharia de Guaratinguetá, Av. Ariberto Pereira da CunhaUniversidade Federal do Rio Grande do NorteGoverno da ParaíbaUniversidade Estadual Paulista (Unesp)Holanda, R. F.L.Pordeus-Da-Silva, G.Pereira, S. H. [UNESP]2021-06-25T10:36:23Z2021-06-25T10:36:23Z2020-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1088/1475-7516/2020/09/053Journal of Cosmology and Astroparticle Physics, v. 2020, n. 9, 2020.1475-7516http://hdl.handle.net/11449/20667710.1088/1475-7516/2020/09/0532-s2.0-85092587155Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Cosmology and Astroparticle Physicsinfo:eu-repo/semantics/openAccess2021-10-23T09:34:06Zoai:repositorio.unesp.br:11449/206677Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T09:34:06Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
A low Hubble constant from galaxy distribution observations |
title |
A low Hubble constant from galaxy distribution observations |
spellingShingle |
A low Hubble constant from galaxy distribution observations Holanda, R. F.L. Baryon acoustic oscillations Galaxy clusters |
title_short |
A low Hubble constant from galaxy distribution observations |
title_full |
A low Hubble constant from galaxy distribution observations |
title_fullStr |
A low Hubble constant from galaxy distribution observations |
title_full_unstemmed |
A low Hubble constant from galaxy distribution observations |
title_sort |
A low Hubble constant from galaxy distribution observations |
author |
Holanda, R. F.L. |
author_facet |
Holanda, R. F.L. Pordeus-Da-Silva, G. Pereira, S. H. [UNESP] |
author_role |
author |
author2 |
Pordeus-Da-Silva, G. Pereira, S. H. [UNESP] |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Federal do Rio Grande do Norte Governo da Paraíba Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Holanda, R. F.L. Pordeus-Da-Silva, G. Pereira, S. H. [UNESP] |
dc.subject.por.fl_str_mv |
Baryon acoustic oscillations Galaxy clusters |
topic |
Baryon acoustic oscillations Galaxy clusters |
description |
An accurate determination of the Hubble constant remains a puzzle in observational cosmology. The possibility of a new physics has emerged with a significant tension between the current expansion rate of our Universe measured from the cosmic microwave background by the Planck satellite and from local methods. In this paper, new tight estimates on this parameter are obtained by considering two data sets from galaxy distribution observations: galaxy cluster gas mass fractions and baryon acoustic oscillation measurements. Priors from the Big Bang nucleosynthesis (BBN) were also considered. By considering the flat ΛCDM and XCDM models, and the non-flat ΛCDM model, our main results are: H0 = 65.9+1−155 km s−1 Mpc−1, H0 = 65.9+4−4.04 km s−1 Mpc−1 and H0 = 64.3+4−454 km s−1 Mpc−1 in 2σ c.l., respectively. These estimates are in full agreement with the Planck satellite results. Our analyses in these cosmological scenarios also support a negative value for the deceleration parameter at least in 3σ c.l.. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-09-01 2021-06-25T10:36:23Z 2021-06-25T10:36:23Z |
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/10.1088/1475-7516/2020/09/053 Journal of Cosmology and Astroparticle Physics, v. 2020, n. 9, 2020. 1475-7516 http://hdl.handle.net/11449/206677 10.1088/1475-7516/2020/09/053 2-s2.0-85092587155 |
url |
http://dx.doi.org/10.1088/1475-7516/2020/09/053 http://hdl.handle.net/11449/206677 |
identifier_str_mv |
Journal of Cosmology and Astroparticle Physics, v. 2020, n. 9, 2020. 1475-7516 10.1088/1475-7516/2020/09/053 2-s2.0-85092587155 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Cosmology and Astroparticle Physics |
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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1797789618596216832 |