Research
FRW Viscous Fluid cosmological Model in f(R,T) Gravity
Friedmann -Robertson-Walker (FRW) space time is considered in f(R,T) gravity proposed by Harko et al. (Phys.Rev.D 84, 024020, 2011) when the source for energy momentum tensor is a bulk viscous fluid. A barotropic equation of state for the pressure and energy density is assumed to get a determinate solution of the field equations. Also the bulk viscous pressure is assumed to be proportional to energy density. A physical discussion of the model is also presented
LRS Bianchi Type a II Universe in f(R,T) Theory of Gravity
LRS Bianchi Type-II space – time is considered in the presence of a perfect fluid source in the framework of f(R,T) gravity proposed by Harko et al. [Phy.Rev-D 84, 024020(2011)]. An exact cosmological model with an appropriate choice of the function f(RT) is obtained using a special law of variation for Hubble’s parameter proposed by Bermann ( Nuovo Cimento B 74. 182,1983). The physical behavior of the cosmological model is, also, studied.
