Table of Contents
ISRN Astronomy and Astrophysics
Volume 2013 (2013), Article ID 543483, 5 pages
http://dx.doi.org/10.1155/2013/543483
Research Article

Axially Symmetric Bulk Viscous String Cosmological Models in GR and Brans-Dicke Theory of Gravitation

Department of Applied Mathematics, Andhra University, Visakhapatnam 530003, India

Received 5 August 2013; Accepted 25 September 2013

Academic Editors: G. Bothun, H. Dehnen, and H. Zhao

Copyright © 2013 V. U. M. Rao and D. Neelima. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Axially symmetric string cosmological models with bulk viscosity in Brans-Dicke (1961) and general relativity (GR) have been studied. The field equations have been solved by using the anisotropy feature of the universe in the axially symmetric space-time. Some important features of the models, thus obtained, have been discussed. We noticed that the presence of scalar field does not affect the geometry of the space-time but changes the matter distribution, and as a special case, it is always possible to obtain axially symmetric string cosmological model with bulk viscosity in general relativity.