We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
ANISOTROPIC BIANCHI-V COSMOLOGICAL MODELS IN SAEZ–BALLESTER THEORY OF GRAVITATION.
- Authors
Singh, C. P.; Zeyauddin, Mohd.; Ram, Shri
- Abstract
A general approach for investigating Bianchi-V cosmological models is introduced in a scalar-tensor theory of gravitation proposed by Saez and Ballester in which the law of variation for Hubble's parameter is taken into account. This variation for Hubble's parameter that yields a constant value of deceleration parameter is then utilized to solve the field equations governing anisotropic Bianchi-V space–time filled with perfect fluid. Two types of exact solutions that correspond to singular and nonsingular models are presented. Finally, we arrive to the conclusion that the universe decelerates for positive value of deceleration parameter whereas it accelerates for negative one. The behaviors of observationally important parameters are discussed in detail. Exact expressions for look-back time, luminosity distance and event horizon versus redshift are derived and their significance are discussed in detail. It has been observed that the solutions are compatible with the results of recent observations.
- Subjects
METAPHYSICAL cosmology; SCALAR field theory; LUMINOSITY distance; REDSHIFT; ACCELERATION (Mechanics); HUBBLE deep field; PARAMETER estimation; FLUCTUATIONS (Physics)
- Publication
International Journal of Modern Physics A: Particles & Fields; Gravitation; Cosmology; Nuclear Physics, 2008, Vol 23, Issue 18, p2719
- ISSN
0217-751X
- Publication type
Article
- DOI
10.1142/S0217751X08040512