Exact solutions of Brans-Dicke cosmology and the cosmic coincidence problem

Detalhes bibliográficos
Autor(a) principal: Carneiro,S.
Data de Publicação: 2005
Outros Autores: Montenegro Jr.,A. E.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Brazilian Journal of Physics
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332005000700009
Resumo: We present some cosmological solutions of Brans-Dicke theory, characterized by a decaying vacuum energy density and by a constant relative matter density. With these features, they shed light on the cosmological constant problems, leading to a presently small vacuum term, and to a constant ratio between the vacuum and matter energy densities. By fixing the only free parameter of our solutions, we obtain cosmological parameters in accordance with observations of the relative matter density, the universe age and redshift-distance relations.
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spelling Exact solutions of Brans-Dicke cosmology and the cosmic coincidence problemWe present some cosmological solutions of Brans-Dicke theory, characterized by a decaying vacuum energy density and by a constant relative matter density. With these features, they shed light on the cosmological constant problems, leading to a presently small vacuum term, and to a constant ratio between the vacuum and matter energy densities. By fixing the only free parameter of our solutions, we obtain cosmological parameters in accordance with observations of the relative matter density, the universe age and redshift-distance relations.Sociedade Brasileira de Física2005-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332005000700009Brazilian Journal of Physics v.35 n.4b 2005reponame:Brazilian Journal of Physicsinstname:Sociedade Brasileira de Física (SBF)instacron:SBF10.1590/S0103-97332005000700009info:eu-repo/semantics/openAccessCarneiro,S.Montenegro Jr.,A. E.eng2006-01-16T00:00:00Zoai:scielo:S0103-97332005000700009Revistahttp://www.sbfisica.org.br/v1/home/index.php/pt/ONGhttps://old.scielo.br/oai/scielo-oai.phpsbfisica@sbfisica.org.br||sbfisica@sbfisica.org.br1678-44480103-9733opendoar:2006-01-16T00:00Brazilian Journal of Physics - Sociedade Brasileira de Física (SBF)false
dc.title.none.fl_str_mv Exact solutions of Brans-Dicke cosmology and the cosmic coincidence problem
title Exact solutions of Brans-Dicke cosmology and the cosmic coincidence problem
spellingShingle Exact solutions of Brans-Dicke cosmology and the cosmic coincidence problem
Carneiro,S.
title_short Exact solutions of Brans-Dicke cosmology and the cosmic coincidence problem
title_full Exact solutions of Brans-Dicke cosmology and the cosmic coincidence problem
title_fullStr Exact solutions of Brans-Dicke cosmology and the cosmic coincidence problem
title_full_unstemmed Exact solutions of Brans-Dicke cosmology and the cosmic coincidence problem
title_sort Exact solutions of Brans-Dicke cosmology and the cosmic coincidence problem
author Carneiro,S.
author_facet Carneiro,S.
Montenegro Jr.,A. E.
author_role author
author2 Montenegro Jr.,A. E.
author2_role author
dc.contributor.author.fl_str_mv Carneiro,S.
Montenegro Jr.,A. E.
description We present some cosmological solutions of Brans-Dicke theory, characterized by a decaying vacuum energy density and by a constant relative matter density. With these features, they shed light on the cosmological constant problems, leading to a presently small vacuum term, and to a constant ratio between the vacuum and matter energy densities. By fixing the only free parameter of our solutions, we obtain cosmological parameters in accordance with observations of the relative matter density, the universe age and redshift-distance relations.
publishDate 2005
dc.date.none.fl_str_mv 2005-12-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332005000700009
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332005000700009
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-97332005000700009
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Física
publisher.none.fl_str_mv Sociedade Brasileira de Física
dc.source.none.fl_str_mv Brazilian Journal of Physics v.35 n.4b 2005
reponame:Brazilian Journal of Physics
instname:Sociedade Brasileira de Física (SBF)
instacron:SBF
instname_str Sociedade Brasileira de Física (SBF)
instacron_str SBF
institution SBF
reponame_str Brazilian Journal of Physics
collection Brazilian Journal of Physics
repository.name.fl_str_mv Brazilian Journal of Physics - Sociedade Brasileira de Física (SBF)
repository.mail.fl_str_mv sbfisica@sbfisica.org.br||sbfisica@sbfisica.org.br
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