• SPHERICALLY SYMMETRIC STRING COSMOLOGICAL MODEL IN ROSEN’S THEORIES OF GRAVITATION

Abstract

In this paper the solutions of spherical symmetric cosmological model are obtained in the context of Rosen’s bimetric theory of Relativity(BR) and  bimetric general theory of relativity (BGR).In both the theories  under the assumption that of space-time admits one parameter group of conformal motion, it is observed that the model satisfied energy conditions. Also it is noticed that the arbitrary function  (i.e. conformal factor) in the Lie derivative of the metric tensor is remain constant in BR.