Izvorni znanstveni članak
Anisotropic viscous fluid cosmological models with heat flow in Saez-Ballester theory of gravitation
Shri Ram
; Department of Applied Mathematics, Institute of Technology, Banaras Hindu University, Varanasi 2210 05, India
M. K. Verma
; Department of Applied Mathematics, Institute of Technology, Banaras Hindu University, Varanasi 2210 05, India
Mohd. Zeyauddin
; Department of Applied Mathematics, Institute of Technology, Banaras Hindu University, Varanasi 2210 05, India
Sažetak
We discuss the field equations in Saez-Ballester scalar-tensor theory of gravitation for a Bianchi type-V model filled with viscous fluid together with heat flow. We obtain two classes of cosmological solutions by applying a special law of variation of Hubble's parameter which yields a constant value of deceleration parameter. One class of solutions corresponds to a model of universe which evolves from a big-bang type singularity at t=0 and expands with power-law expansion. The other class of solutions represents an universe expanding exponentially having singularity in the infinite past. The physical and kinematical features of the models are discussed. We observe that the models of the universe in two types of cosmologies are compatible with the results of recent observations.
Ključne riječi
Bianchi V; cosmology; Hubble's parameter; viscous fluid
Hrčak ID:
304585
URI
Datum izdavanja:
1.11.2009.
Posjeta: 441 *