Effect of bulk viscosity in cosmic acceleration

Abstract

In the framework of extended theory of gravity, an accelerating cosmological model has been presented in this paper in an anisotropic space-time. The extended gravity considered as f (R, T ) gravity with the matter field as viscous fluid. The role of viscous coefficient has been discussed on the cosmic expansion issue. In the developed formalism a variable Hubble parameter has been incorporated to express the dynamical parameter with respect to redshift. The model is observed to be compatible with recent observational data.

FLRW Transit Cosmological Model in F (R,T) Gravity

“…Some theorist working in this area have attempted to study it by constructing the cosmological models using geometrical parameters, such as a parametrization of the deceleration parameter, Hubble parameter or scale factor which can provide the transition from past deceleration to present acceleration [21][22][23][24]. Most of these models have been studied in homogeneous and isotropic background [25][26][27][28][29][30][31][32][33], but some studies also have been considered in homogeneous but anisotropic background [34][35][36][37][38][39][40].…”