A cosmological model in f (G,T) gravity with time varying deceleration parameter

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dc.contributor.authorBeesham, Aroonkumar
dc.contributor.authorShukla, Bhupendra Kumar
dc.contributor.authorTiwari, Rishi Kumaras
dc.coverage.conferenceissn
dc.date.accessioned2026-02-17T07:59:41Z
dc.date.available2026-02-17T07:59:41Z
dc.date.issued2023
dc.departmentNameMathematical Sciences
dc.description.abstractThe current study aims at investigating a modified theory of gravity called theory. Our focus is on a Gauss-Bonnet cosmological model that integrates a non-linear Gauss-Bonnet term and a linear trace term. We assume , where , and represent free parameters. To solve the field equations, we employ a specialized formulation of the deceleration parameter, represented as , where and are model parameters. Consequently, we determine the optimal values of the model parameters by aligning them with the latest observational datasets, including 57 data points from the Cosmic Chronometers datasets, Pantheon datasets, and BAO datasets. Furthermore, we analyze the physical behavior of the cosmographic parameters corresponding to the constrained values of the model parameters, as well as energy density and pressure. The evolution of the deceleration parameter predicts a transition from the decelerated to the accelerated phases of the universe. Importantly, our cosmological model effectively describes the observed cosmic acceleration in the late-time universe, eliminating the need to introduce an additional dark energy component in the field equations.
dc.facultyFaculty of Science, Agriculture and Engineering
dc.identifier.citationShukla, B.K., Tiwari, R.K. and Beesham, A., 2023. A cosmological model in f (G, T) gravity with time varying deceleration parameter. Astrophysics and Space Science, 368(10), pp.1-14.
dc.identifier.issn1572-946X (online)
dc.identifier.issn0004-640X (print)
dc.identifier.otherhttps://doi.org/10.1007/s10509-023-04234-x
dc.identifier.urihttp://hdl.handle.net/10530/58733
dc.inproceedingsissn
dc.issuenumber368 / 10
dc.keynoteissn
dc.language.isoen
dc.pages1 - 14
dc.peerreviewedYes
dc.publisherSpringer Nature
dc.subjectf (G,T ) modified theory
dc.subjectVariable deceleration parameter
dc.subjectLate-time acceleration
dc.titleA cosmological model in f (G,T) gravity with time varying deceleration parameter
dc.title.journalAstrophysics and Space Science
dc.typeJournal Article
dspace.entity.typePublication
relation.isAuthorOfPublicationcac21718-4edb-4a03-a532-568ac9799cc1
relation.isAuthorOfPublication.latestForDiscoverycac21718-4edb-4a03-a532-568ac9799cc1
relation.isOrgUnitOfPublication71c06a0e-e111-424c-8caf-20609eacb82c
relation.isOrgUnitOfPublication.latestForDiscovery71c06a0e-e111-424c-8caf-20609eacb82c
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