Astrophysics and Space Science

, Volume 335, Issue 2, pp 635–638

Anisotropic universe with cosmic strings and bulk viscosity in a scalar–tensor theory of gravitation

  • V. U. M. Rao
  • G. Sree Devi Kumari
  • K. V. S. Sireesha
Original Article

DOI: 10.1007/s10509-011-0776-9

Cite this article as:
Rao, V.U.M., Sree Devi Kumari, G. & Sireesha, K.V.S. Astrophys Space Sci (2011) 335: 635. doi:10.1007/s10509-011-0776-9

Abstract

A spatially homogeneous and anisotropic Bianchi type-I cosmological model is obtained in a scalar–tensor theory of gravitation proposed by Saez and Ballester (Phys. Lett. A 113:467, 1986) when the source for energy momentum tensor is a bulk viscous fluid containing one dimensional cosmic strings. Some physical and kinematical properties of the model are discussed. It is observed that the bulk viscosity has a greater role in getting an accelerated expansion of the universe in this theory.

Keywords

ViscosityAnisotropic universeCosmic stringsScalar tensor theory

Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • V. U. M. Rao
    • 1
  • G. Sree Devi Kumari
    • 1
  • K. V. S. Sireesha
    • 1
  1. 1.Department of Applied MathematicsAndhra UniversityVisakhapatnamIndia