English

Anisotropic cosmological models in $f(R,T)$ gravity with variable deceleration parameter

General Relativity and Quantum Cosmology 2017-03-20 v2

Abstract

The objective of this work enclosed with the study of spatially homogeneous anisotropic Bianchi type-I universe in f(R,T)f(R,T) gravity (where RR is the Ricci scalar and TT is the trace of stress energy momentum tensor) in two different cases viz. f(R,T)=R+2f(T)f(R,T)=R+2f(T) and f(R,T)=f1(R)+f2(T)f(R,T)=f_1(R)+f_2(T) with bulk viscosity matter content. In this study, we consider a time varying deceleration parameter, which generates an accelerating universe to obtain the exact solution of the field equations. The physical and kinematical properties of both the models are discussed in detail for the future evolution of the universe. We have explored the nature of WEC, DEC, SEC and energy density for both the cases. We have found that both the models, with bulk viscosity matter component, show an acceleration of the universe. We have also shown that the cosmic jerk parameter is compatible with the three kinematical data sets.

Keywords

Cite

@article{arxiv.1702.02469,
  title  = {Anisotropic cosmological models in $f(R,T)$ gravity with variable deceleration parameter},
  author = {P. K. Sahoo and Parbati Sahoo and Binaya K. Bishi},
  journal= {arXiv preprint arXiv:1702.02469},
  year   = {2017}
}

Comments

Accepted for publication in Int. J. Geom. Meth. Mod. Phys

R2 v1 2026-06-22T18:12:51.655Z