The cosmic coincidence in Brans–Dicke cosmologies

Detalhes bibliográficos
Autor(a) principal: Carneiro, Saulo
Data de Publicação: 2005
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://repositorio.ufba.br/ri/handle/ri/13357
Resumo: Texto completo: acesso restrito. p.2201-2206
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spelling Carneiro, SauloCarneiro, Saulo2013-10-30T18:05:16Z20050218-2718http://repositorio.ufba.br/ri/handle/ri/13357v.14 n. 12Texto completo: acesso restrito. p.2201-2206Among the suggested solutions to the cosmological constant problem, we nd the idea of a dynamic vacuum, with an energy density decaying with the universe expansion. We investigate the possibility of a variation in the gravitational constant as well, induced,at the cosmological scale, by the vacuum decay. We consider an e ective Brans{Dicke theory in the spatially at FLRW spacetime, nding late time solutions characterized by a constant ratio between the matter and vacuum energy densities. By using the observed limits for the universe age, we x the only free parameter of our solutions, obtaining a relative matter density in the range 0:25 < m < 0:4. In particular, for Ht = 1 we obtain m = 1=3. This constitutes a possible explanation for another problem related to the cosmological term, the cosmic coincidence problem.Submitted by Edileide Reis (leyde-landy@hotmail.com) on 2013-10-17T11:54:02Z No. of bitstreams: 1 SAULO CARNEIRO.pdf: 185054 bytes, checksum: 91d565d7d8ce7b595ef293096d5fc1db (MD5)Approved for entry into archive by Rodrigo Meirelles (rodrigomei@ufba.br) on 2013-10-30T18:05:16Z (GMT) No. of bitstreams: 1 SAULO CARNEIRO.pdf: 185054 bytes, checksum: 91d565d7d8ce7b595ef293096d5fc1db (MD5)Made available in DSpace on 2013-10-30T18:05:16Z (GMT). No. of bitstreams: 1 SAULO CARNEIRO.pdf: 185054 bytes, checksum: 91d565d7d8ce7b595ef293096d5fc1db (MD5) Previous issue date: 2005http://dx.doi.org/ 10.1142/S021827180500784Xreponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBACosmological constantScalar-tensor theoriesThe cosmic coincidence in Brans–Dicke cosmologiesInternational Journal of Modern Physics Dinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article10000-01-01info:eu-repo/semantics/openAccessengLICENSElicense.txtlicense.txttext/plain1365https://repositorio.ufba.br/bitstream/ri/13357/2/license.txt5371a150bdc863f78dcf39281543bd86MD52ORIGINALSAULO CARNEIRO.pdfSAULO CARNEIRO.pdfapplication/pdf185054https://repositorio.ufba.br/bitstream/ri/13357/1/SAULO%20CARNEIRO.pdf91d565d7d8ce7b595ef293096d5fc1dbMD51TEXTSAULO CARNEIRO.pdf.txtSAULO CARNEIRO.pdf.txtExtracted texttext/plain16437https://repositorio.ufba.br/bitstream/ri/13357/3/SAULO%20CARNEIRO.pdf.txte0d04990c410c50bcaf172a48a3e0adaMD53ri/133572022-07-05 14:03:48.904oai:repositorio.ufba.br:ri/13357VGVybW8gZGUgTGljZW7vv71hLCBu77+9byBleGNsdXNpdm8sIHBhcmEgbyBkZXDvv71zaXRvIG5vIFJlcG9zaXTvv71yaW8gSW5zdGl0dWNpb25hbCBkYSBVRkJBLg0KDQogUGVsbyBwcm9jZXNzbyBkZSBzdWJtaXNz77+9byBkZSBkb2N1bWVudG9zLCBvIGF1dG9yIG91IHNldSByZXByZXNlbnRhbnRlIGxlZ2FsLCBhbyBhY2VpdGFyIA0KZXNzZSB0ZXJtbyBkZSBsaWNlbu+/vWEsIGNvbmNlZGUgYW8gUmVwb3NpdO+/vXJpbyBJbnN0aXR1Y2lvbmFsIGRhIFVuaXZlcnNpZGFkZSBGZWRlcmFsIGRhIEJhaGlhIA0KbyBkaXJlaXRvIGRlIG1hbnRlciB1bWEgY++/vXBpYSBlbSBzZXUgcmVwb3NpdO+/vXJpbyBjb20gYSBmaW5hbGlkYWRlLCBwcmltZWlyYSwgZGUgcHJlc2VydmHvv73vv71vLiANCkVzc2VzIHRlcm1vcywgbu+/vW8gZXhjbHVzaXZvcywgbWFudO+/vW0gb3MgZGlyZWl0b3MgZGUgYXV0b3IvY29weXJpZ2h0LCBtYXMgZW50ZW5kZSBvIGRvY3VtZW50byANCmNvbW8gcGFydGUgZG8gYWNlcnZvIGludGVsZWN0dWFsIGRlc3NhIFVuaXZlcnNpZGFkZS4NCg0KIFBhcmEgb3MgZG9jdW1lbnRvcyBwdWJsaWNhZG9zIGNvbSByZXBhc3NlIGRlIGRpcmVpdG9zIGRlIGRpc3RyaWJ1ae+/ve+/vW8sIGVzc2UgdGVybW8gZGUgbGljZW7vv71hIA0KZW50ZW5kZSBxdWU6DQoNCiBNYW50ZW5kbyBvcyBkaXJlaXRvcyBhdXRvcmFpcywgcmVwYXNzYWRvcyBhIHRlcmNlaXJvcywgZW0gY2FzbyBkZSBwdWJsaWNh77+977+9ZXMsIG8gcmVwb3NpdO+/vXJpbw0KcG9kZSByZXN0cmluZ2lyIG8gYWNlc3NvIGFvIHRleHRvIGludGVncmFsLCBtYXMgbGliZXJhIGFzIGluZm9ybWHvv73vv71lcyBzb2JyZSBvIGRvY3VtZW50bw0KKE1ldGFkYWRvcyBlc2NyaXRpdm9zKS4NCg0KIERlc3RhIGZvcm1hLCBhdGVuZGVuZG8gYW9zIGFuc2Vpb3MgZGVzc2EgdW5pdmVyc2lkYWRlIGVtIG1hbnRlciBzdWEgcHJvZHXvv73vv71vIGNpZW5077+9ZmljYSBjb20gDQphcyByZXN0cmnvv73vv71lcyBpbXBvc3RhcyBwZWxvcyBlZGl0b3JlcyBkZSBwZXJp77+9ZGljb3MuDQoNCiBQYXJhIGFzIHB1YmxpY2Hvv73vv71lcyBzZW0gaW5pY2lhdGl2YXMgcXVlIHNlZ3VlbSBhIHBvbO+/vXRpY2EgZGUgQWNlc3NvIEFiZXJ0bywgb3MgZGVw77+9c2l0b3MgDQpjb21wdWxz77+9cmlvcyBuZXNzZSByZXBvc2l077+9cmlvIG1hbnTvv71tIG9zIGRpcmVpdG9zIGF1dG9yYWlzLCBtYXMgbWFudO+/vW0gYWNlc3NvIGlycmVzdHJpdG8gDQphbyBtZXRhZGFkb3MgZSB0ZXh0byBjb21wbGV0by4gQXNzaW0sIGEgYWNlaXRh77+977+9byBkZXNzZSB0ZXJtbyBu77+9byBuZWNlc3NpdGEgZGUgY29uc2VudGltZW50bw0KIHBvciBwYXJ0ZSBkZSBhdXRvcmVzL2RldGVudG9yZXMgZG9zIGRpcmVpdG9zLCBwb3IgZXN0YXJlbSBlbSBpbmljaWF0aXZhcyBkZSBhY2Vzc28gYWJlcnRvLg==Repositório InstitucionalPUBhttp://192.188.11.11:8080/oai/requestopendoar:19322022-07-05T17:03:48Repositório Institucional da UFBA - Universidade Federal da Bahia (UFBA)false
dc.title.pt_BR.fl_str_mv The cosmic coincidence in Brans–Dicke cosmologies
dc.title.alternative.pt_BR.fl_str_mv International Journal of Modern Physics D
title The cosmic coincidence in Brans–Dicke cosmologies
spellingShingle The cosmic coincidence in Brans–Dicke cosmologies
Carneiro, Saulo
Cosmological constant
Scalar-tensor theories
title_short The cosmic coincidence in Brans–Dicke cosmologies
title_full The cosmic coincidence in Brans–Dicke cosmologies
title_fullStr The cosmic coincidence in Brans–Dicke cosmologies
title_full_unstemmed The cosmic coincidence in Brans–Dicke cosmologies
title_sort The cosmic coincidence in Brans–Dicke cosmologies
author Carneiro, Saulo
author_facet Carneiro, Saulo
author_role author
dc.contributor.author.fl_str_mv Carneiro, Saulo
Carneiro, Saulo
dc.subject.por.fl_str_mv Cosmological constant
Scalar-tensor theories
topic Cosmological constant
Scalar-tensor theories
description Texto completo: acesso restrito. p.2201-2206
publishDate 2005
dc.date.issued.fl_str_mv 2005
dc.date.accessioned.fl_str_mv 2013-10-30T18:05:16Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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status_str publishedVersion
dc.identifier.uri.fl_str_mv http://repositorio.ufba.br/ri/handle/ri/13357
dc.identifier.issn.none.fl_str_mv 0218-2718
dc.identifier.number.pt_BR.fl_str_mv v.14 n. 12
identifier_str_mv 0218-2718
v.14 n. 12
url http://repositorio.ufba.br/ri/handle/ri/13357
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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