Friday, May 25, 2012

1205.5265 (Prashant S. Baghel et al.)

Bianchi Type V Universe with Bulk Viscous Matter and Time Varying
Gravitational and Cosmological Constants

Prashant S. Baghel, J. P. Singh
Spatially homogeneous and anisotropic Bianchi type V space-time with bulk viscous fluid source and time varying gravitational constant $G$ and cosmological term $\Lambda$ are considered. Coefficient of bulk viscosity $\zeta$ is assumed as a simple linear function of Hubble parameter $H$ (i.e. $\zeta=\zeta_0+\zeta_1 H$, where $\zeta_0$ and $\zeta_1$ are constants). The Einstein field equations are solved explicitly by using a law of variation for the Hubble parameter, which yields a constant value of deceleration parameter. Physical and kinematical parameters of the models are discussed. The models are found to be compatible with the results of astronomical observations.
View original:

No comments:

Post a Comment