A New Class of Bianchi Type-I Cosmological Models in Scalar-Tensor Theory of Gravitation and Late Time Acceleration
arXiv:1204.5173 · doi:10.1007/s10773-012-1262-z
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 Saez and Ballester (Phys. Lett. 113:467, 1986) 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.
arXiv comment16 pages, 8 figures
References in corpus (19)
- Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
- First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
- Type Ia Supernova Discoveries at z>1 From the Hubble Space Telescope: Evidence for Past Deceleration and Constraints on Dark Energy Evolution
- Cosmological parameters from SDSS and WMAP
- Discovery of a Supernova Explosion at Half the Age of the Universe and its Cosmological Implications
- Cosmological Results from High-z Supernovae
- Constraints on dark energy from Chandra observations of the largest relaxed galaxy clusters
- The Second Survey of the Molecular Clouds in the Large Magellanic Cloud by NANTEN. II. Star Formation
- A theoretician's analysis of the supernova data and the limitations in determining the nature of dark energy
- Hubble Space Telescope and Ground-Based Observations of Type Ia Supernovae at Redshift 0.5: Cosmological Implications
- Acceleration at z>1?
- Estimating the Redshift Distribution of Photometric Galaxy Samples II. Applications and Tests of a New Method
- A Sudden Gravitational Transition
- Two-Fluid Scenario for Dark Energy Models in an FRW Universe-Revisited
- Bianchi Type I Cosmology in Generalized Saez-Ballester Theory via Noether Gauge Symmetry
- An Interacting Two-Fluid Scenario for Dark Energy in FRW Universe
- Accelerating dark energy models in bianchi Type-V space-time
- Bianchi-V string cosmological model and late time acceleration
- Anisotropic cosmology in Sáez-Ballester theory: classical and quantum solutions