| Texto completo | |
| Autor(es): |
Moraes, P. H. R. S.
;
Sahoo, P. K.
Número total de Autores: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | EUROPEAN PHYSICAL JOURNAL C; v. 77, n. 7 JUL 18 2017. |
| Citações Web of Science: | 35 |
| Resumo | |
f (R, T) gravity is an extended theory of gravity in which the gravitational action contains general terms of both the Ricci scalar R and the trace of the energy-momentum tensor T. In this way, f (R, T) models are capable of describing a non-minimal coupling between geometry (through terms in R) and matter (through terms in T). In this article we construct a cosmological model from the simplest non-minimal matter-geometry coupling within the f (R, T) gravity formalism, by means of an effective energy-momentum tensor, given by the sum of the usual matter energy-momentum tensor with a dark energy contribution, with the latter coming from the matter-geometry coupling terms. We apply the energy conditions to our solutions in order to obtain a range of values for the free parameters of the model which yield a healthy and well-behaved scenario. For some values of the free parameters which are submissive to the energy conditions application, it is possible to predict a transition from a decelerated period of the expansion of the universe to a period of acceleration (dark energy era). We also propose further applications of this particular case of the f (R, T) formalism in order to check its reliability in other fields, rather than cosmology. (AU) | |
| Processo FAPESP: | 15/08476-0 - Ondas gravitacionais em teorias f(R,T): estados de polarização e fontes astrofísicas |
| Beneficiário: | Pedro Henrique Ribeiro da Silva Moraes |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |