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Massive String Cloud Cosmologies in Saez-Ballester Theory of Gravitation
Authors:S K Tripathy  S K Nayak  S K Sahu and T R Routray
Institution:(1) Department of Physics, Sundargarh Engineering College, Kirei, Sundargarh, Orissa, 770073, India;(2) P.G. Department of Physics, Sambalpur University, Jyotivihar, Sambalpur, Orissa, 768019, India;(3) Department of Mathematics, Sundargarh Engineering College, Kirei, Sundargarh, Orissa, 770073, India;(4) Department of Mathematics, Lingaya’s Institute of Management and Technology, Faridabad, Delhi, 121002, India
Abstract:String cloud cosmological models are studied using spatially homogeneous and anisotropic Bianchi type VI0 metric in Saez-Ballester Scalar-Tensor theory of gravitation. The field equations are solved for massive string cloud with particles attached to them. A more general linear equation of state of the cosmic string tension density with the proper energy density of the universe is considered instead of taking any particular relationships like pure geometric string or the case of the p-string. The pure geometric string and p-string solutions can be easily inferred from the models. For all viable models the possible limiting values of the linear connection between the proper energy density and string tension density have been calculated. The physical and kinematical properties of the models have been discussed in detail.
Keywords:String cosmology  Saez-Ballester theory
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