Title of article :
String cosmological models with bulk viscosity in Nordtvedt s general scalar-tensor theory of gravitation
Author/Authors :
Velagapudi, Uma Maheswara Rao Andhra University - Department of Applied Mathematics, India , Davuluri, Neelima Andhra University - Department of Applied Mathematics, India
Abstract :
We have obtained and presented spatially homogeneous Bianchi types II, VIII, and IX string cosmological models with bulk viscosity in Nordtvedt s (Astrophys. J. 161:1059, 1970) general scalar-tensor theory of gravitation with the help of a special case proposed by Schwinger. It is observed that only the bulk viscous cosmological model exists in the case of Bianchi type IX universe. Some important features of the models, thus obtained, have been discussed.
Keywords :
Bulk viscosity , Cosmic strings , Bianchi type II, VIII, and IX metrics , Nordtvedt s general scalar , tensor theory
Journal title :
Journal of Theoretical and Applied Physics
Journal title :
Journal of Theoretical and Applied Physics
