Kantowski-Sachs viscous fluid cosmological model with a varying L

Authors : S P KANDALKAR, P P KHADE, And S P GAWANDE

Pages : 155-165

Doi:10.3906/sag-1209-30

View : 18 | Download : 7

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :We study the Kantowski-Sachs cosmological model filled with viscous fluid in the presence of cosmological term L. To get a deterministic solution, a condition between metric potentials is used. The viscous coefficient of bulk viscous fluid is assumed to be a power function of mass density, whereas coefficient of shear viscosity is considered proportional to scale of expansion in the model. It is found that the cosmological constant L is positive and is a decreasing function of time, which is supported by results from recent supernova observations. Some physical and geometrical properties of the models are also discussed.
Keywords : Kantowski Sachs viscous fluid model, cosmology, variable cosmological constant