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- Title
A New Class of Bianchi Type-I Cosmological Models in Scalar-Tensor Theory of Gravitation and Late Time Acceleration.
- Authors
Pradhan, Anirudh; Singh, Ajay; Amirhashchi, H.
- Abstract
A new class of a spatially homogeneous and anisotropic Bianchi type-I cosmological models of the universe for perfect fluid distribution within the framework of scalar-tensor theory of gravitation proposed by Sáez and Ballester (Phys. Lett. 113:467, ) is investigated. To prevail the deterministic solutions we choose the different scale factors which yield time-dependent deceleration parameters (DP) representing models which generate a transition of the universe from the early decelerated phase to the recent accelerating phase. Three different physically viable models of the universe are obtained in which their anisotropic solutions may enter to some isotropic inflationary era. The modified Einstein's field equations are solved exactly and the models are found to be in good concordance with recent observations. Some physical and geometric properties of the models are also discussed.
- Subjects
METAPHYSICAL cosmology; TENSOR algebra; GRAVITATION; ANISOTROPY; GEOMETRY; NUMERICAL solutions to Einstein field equations; MATHEMATICAL models; ACCELERATION (Mechanics)
- Publication
International Journal of Theoretical Physics, 2012, Vol 51, Issue 12, p3769
- ISSN
0020-7748
- Publication type
Article
- DOI
10.1007/s10773-012-1262-z