Testing adiabatic expansion of polytropic universe model with SNe Ia data

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dc.contributor.authorDil, Emre
dc.contributor.authorOztas, Ahmet Mecit
dc.contributor.authorDil, Elif
dc.date.accessioned2024-03-13T10:35:31Z
dc.date.available2024-03-13T10:35:31Z
dc.date.issued2020
dc.departmentİstanbul Beykent Üniversitesien_US
dc.description.abstractIn order to obtain a better fit for the observational data, various cosmological models have been developed in the literature. For this purpose, we propose an adiabatic expansion of the Universe with a polytropic fluid matter-radiation content and a varying cosmological constant. Basic motivation of this study basically differs from the previous models because our model does not neglect the pressure of the matter content of the Universe. We present the details of our new derivations by obtaining the polytropic matter density and luminosity distances. After constructing the model, two large collections of observational data of supernovae type Ia (SNe Ia) are conducted to diagnose the model. Examining the fitness of our new models of a polytropic universe with the observational data, we find a significant influence of polytropic matter on the cosmological parameters of the expanding universe. We find that our flat constant ? model and varying ? model describes the SNe Ia data significantly better than the other models including the standard model for Gold Data and Union2.1 Data, respectively.en_US
dc.identifier.doi10.1088/1402-4896/ab8a73
dc.identifier.issn0031-8949
dc.identifier.issn1402-4896
dc.identifier.issue6en_US
dc.identifier.scopus2-s2.0-85085550547en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.urihttps://doi.org/10.1088/1402-4896/ab8a73
dc.identifier.urihttps://hdl.handle.net/20.500.12662/4455
dc.identifier.volume95en_US
dc.identifier.wosWOS:000537864000001en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherIop Publishing Ltden_US
dc.relation.ispartofPhysica Scriptaen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectcosmologyen_US
dc.subjecttheoryen_US
dc.subjectcosmological parametersen_US
dc.subjectadiabatic expansionen_US
dc.subjectcosmologyen_US
dc.subjectobservationsen_US
dc.subjectdistance scaleen_US
dc.subjectsupernovaeen_US
dc.subjectgalaxiesen_US
dc.subjectgeneralen_US
dc.titleTesting adiabatic expansion of polytropic universe model with SNe Ia dataen_US
dc.typeArticleen_US

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