10.1186/2251-7235-7-50

String cosmological models with bulk viscosity in Nordtvedt’s general scalar-tensor theory of gravitation

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  • Uma Maheswara Rao Velagapudi1,
  • Neelima Davuluri1,
  1. Department of Applied Mathematics, Andhra University

Published in Issue 2023-11-17

How to Cite

1.
Velagapudi UMR, Davuluri N. String cosmological models with bulk viscosity in Nordtvedt’s general scalar-tensor theory of gravitation. J Theor Appl phys. 2023 Nov. 17;7(1). Available from: https://oiccpress.com/jtap/article/view/2140
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Abstract

AbstractWe 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

  • And IX metrics,
  • Bianchi type II,
  • Bulk viscosity,
  • Cosmic strings,
  • Nordtvedt' s general scalar,
  • Tensor theory,
  • VIII
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