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dc.contributor.authorValentim, R.
dc.contributor.authorJesus, J. F. [UNESP]
dc.date.accessioned2019-10-06T15:37:51Z
dc.date.available2019-10-06T15:37:51Z
dc.date.issued2019-01-01
dc.identifierhttp://dx.doi.org/10.1002/asna.201913570
dc.identifier.citationAstronomische Nachrichten, v. 340, n. 1-3, p. 105-107, 2019.
dc.identifier.issn1521-3994
dc.identifier.issn0004-6337
dc.identifier.urihttp://hdl.handle.net/11449/187495
dc.description.abstractEntropy is a fundamental concept from thermodynamics, and it can be used to study models in the context of the creation cold dark matter. A general feature of these models is that thermodynamic equilibrium is reached at last at the de Sitter era. Total Universe's entropy is calculated based on three terms: apparent horizon (S h ), entropy of matter (S m ), and entropy of radiation (S γ ). The constraints from total entropy come from the first and second derivatives (S ′ ≥ 0 and S ″ < 0) to estimate the parameters of the model with the general matter creation rate. The preliminary outcomes suggest limits for these parameters.en
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.format.extent105-107
dc.language.isoeng
dc.relation.ispartofAstronomische Nachrichten
dc.sourceScopus
dc.subjectcreation of matter
dc.subjectdark matter
dc.subjectentropy
dc.subjectmodels
dc.titleEntropy and creation cold dark matter modelsen
dc.typeArtigo
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.description.affiliationDepartment of Physics Federal Universty of São Paulo – UNIFESP
dc.description.affiliationDepartment of Wood Engineering Universidade Estadual Paulista – UNESP
dc.description.affiliationUnespDepartment of Wood Engineering Universidade Estadual Paulista – UNESP
dc.identifier.doi10.1002/asna.201913570
dc.rights.accessRightsAcesso restrito
dc.description.sponsorshipIdFAPESP: 2016/09831-0
dc.description.sponsorshipIdFAPESP: 2017/05859-0
dc.identifier.scopus2-s2.0-85063502391
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