Observational constraints on varying fundamental constants in a minimal CPC model

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dc.contributor.authorCuzinatto, R. R.
dc.contributor.authorHolanda, R. F.L.
dc.contributor.authorPereira, S. H. [UNESP]
dc.contributor.institutionUniversity of Ottawa
dc.contributor.institutionUniversidade Federal de Alfenas
dc.contributor.institutionUniversidade Federal do Rio Grande do Norte
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.date.accessioned2023-07-29T13:55:12Z
dc.date.available2023-07-29T13:55:12Z
dc.date.issued2023-02-01
dc.description.abstractA minimal model based on the Co-varying Physical Couplings (CPC) framework for gravity is proposed. The CPC framework is based on the assumptions of a metric-compatible four-dimensional Riemannian manifold, where a covariantly conserved stress-energy tensor acts as source of the field equations, which are formally the same as Einstein field equations, but where the couplings {G, c, Λ} are allowed to vary simultaneously. The minimal CPC model takes Λ as a genuine constant while c and G vary in an entangled way that is consistent with Bianchi identity and the aforementioned assumptions. The model is constrained using the most recent galaxy cluster gas mass fraction observational data. Our result indicates that the functions c(z) and G(z) = G0 (c/c0)4 are compatible with constant couplings for the two different parametrizations of c = c(z) adopted here.en
dc.description.affiliationDepartment of Physics University of Ottawa
dc.description.affiliationInstituto de Ciência e Tecnologia Universidade Federal de Alfenas, MG
dc.description.affiliationDepartamento de Física Teórica e Experimental Universidade Federal do Rio Grande do Norte, RN
dc.description.affiliationDepartamento de Física Faculdade de Engenharia e Ciências de Guaratinguetá Universidade Estadual Paulista (UNESP), SP
dc.description.affiliationUnespDepartamento de Física Faculdade de Engenharia e Ciências de Guaratinguetá Universidade Estadual Paulista (UNESP), SP
dc.format.extent633-640
dc.identifierhttp://dx.doi.org/10.1093/mnras/stac3267
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, v. 519, n. 1, p. 633-640, 2023.
dc.identifier.doi10.1093/mnras/stac3267
dc.identifier.issn1365-2966
dc.identifier.issn0035-8711
dc.identifier.scopus2-s2.0-85159601401
dc.identifier.urihttp://hdl.handle.net/11449/248843
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.sourceScopus
dc.subjectcosmology: theory
dc.subjectgalaxies: clusters
dc.subjectgravitation
dc.titleObservational constraints on varying fundamental constants in a minimal CPC modelen
dc.typeArtigo
unesp.author.orcid0000-0003-1189-0515 0000-0003-1189-0515[1]
unesp.departmentFísica e Química - FEGpt

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Guaratinguetá - FEG - Faculdade de Engenharia e Ciências