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

Joint Authors

Sahoo, Pradyumn K.
Moraes, P. H. R. S.
Correa, R. A. C.
Ribeiro, G.

Source

Advances in Astronomy

Issue

Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-8, 8 p.

Publisher

Hindawi Publishing Corporation

Publication Date

2019-06-02

Country of Publication

Egypt

No. of Pages

8

Main Subjects

Astronomy

Abstract EN

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+αR2, and f(T)=2γT, with α and γ 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 α and γ.

American Psychological Association (APA)

Moraes, P. H. R. S.& Sahoo, Pradyumn K.& Ribeiro, G.& Correa, R. A. C.. 2019. A Cosmological Scenario from the Starobinsky Model within the f(R,T) Formalism. Advances in Astronomy،Vol. 2019, no. 2019, pp.1-8.
https://search.emarefa.net/detail/BIM-1114456

Modern Language Association (MLA)

Sahoo, Pradyumn K.…[et al.]. A Cosmological Scenario from the Starobinsky Model within the f(R,T) Formalism. Advances in Astronomy No. 2019 (2019), pp.1-8.
https://search.emarefa.net/detail/BIM-1114456

American Medical Association (AMA)

Moraes, P. H. R. S.& Sahoo, Pradyumn K.& Ribeiro, G.& Correa, R. A. C.. A Cosmological Scenario from the Starobinsky Model within the f(R,T) Formalism. Advances in Astronomy. 2019. Vol. 2019, no. 2019, pp.1-8.
https://search.emarefa.net/detail/BIM-1114456

Data Type

Journal Articles

Language

English

Notes

Includes bibliographical references

Record ID

BIM-1114456