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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

A Cosmological Scenario from the Starobinsky Model within the f(R,T) Formalism

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Moraes, P. H. R. S. [1, 2] ; Sahoo, P. K. [3] ; Ribeiro, G. [4] ; Correa, R. A. C. [1, 5]
Total Authors: 4
[1] ITA, Dept Fis, BR-12228900 Sao Jose Dos Campos, SP - Brazil
[2] Univ Napoli Federico II UNINA, Dipartimento Fis, I-80126 Naples - Italy
[3] Birla Inst Technol & Sci, Dept Math, Hyderabad Campus, Hyderabad 500078, Telangana - India
[4] Univ Estadual Paulista Julio de Mesquita Filho UN, Dept Quim & Fis, BR-12516410 Guaratingueta, SP - Brazil
[5] SISSA, Via Bonomea 265, I-34136 Trieste - Italy
Total Affiliations: 5
Document type: Journal article
Source: ADVANCES IN ASTRONOMY; v. 2019, 2019.
Web of Science Citations: 1

In this paper we derive a novel cosmological model from the f(R,T) theory of gravitation, for which R is the Ricci scalar and T is the trace of the energy-momentum tensor. We consider the functional form f(R,T)=f(R)+f(T), with f(R) being the Starobinsky Model, named R+R2, and f(T)=2T, with and being constants. We show that a hybrid expansion law form for the scale factor is a solution for the derived Friedmann-like equations. In this way, the model is able to predict both the decelerated and the accelerated regimes of expansion of the universe, with the transition redshift between these stages being in accordance with recent observations. We also apply the energy conditions to our material content solutions. Such an application makes us able to obtain the range of acceptability for the free parameters of the model, named and . (AU)

FAPESP's process: 15/08476-0 - Gravitational waves in f(R,T) theories: polarization states and astrophysical sources
Grantee:Pedro Henrique Ribeiro da Silva Moraes
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 16/03276-5 - General theory of Oscillons in Lorentz violating scenarios, configurational entropy and physics of nanomaterials
Grantee:Rafael Augusto Couceiro Correa
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 17/26646-5 - Oscillons in scalar field theories
Grantee:Rafael Augusto Couceiro Correa
Support type: Scholarships abroad - Research Internship - Post-doctor