Axially Symmetric Bulk Viscous String Cosmological Models in GR and Brans-Dicke Theory of Gravitation
Author(s) -
V. U. M. Rao,
D. Neelima
Publication year - 2013
Publication title -
isrn astronomy and astrophysics
Language(s) - English
Resource type - Journals
eISSN - 2090-4746
pISSN - 2090-4738
DOI - 10.1155/2013/543483
Subject(s) - axial symmetry , physics , general relativity , string (physics) , gravitation , brans–dicke theory , classical mechanics , scalar field , volume viscosity , mathematical physics , universe , anisotropy , cosmological model , theoretical physics , string theory , cosmology , viscosity , quantum mechanics
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.
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