Anisotropic bianchi V cosmological model in Scale Covariant Theory of Gravitation with a time-variable deceleration parameter

Abstract

A spatially homogeneous and anisotropic Bianchi type V cosmological model of the universe for perfect fluid within the framework of Scale covariant theory of gravitation proposed by Canuto et al., is studied in view of a variable deceleration parameter which yields the average scale factor a(t) = sinh 1/n (βt), where n and β are positive constants. The solution represents a singular model of the universe. All physical and geometrical properties of the model are thoroughly studied. The time dependent deceleration parameter supports the recent observation. The model represents an accelerating phase for 0 < n ≤ 1 and for n > 1, there is a phase transition from early deceleration to a present accelerating phase.

Evolution of Viscous Dark Energy Models in Brans-Dicke Theory of Gravitation

“…From the observations of the researchers it is found that the deceleration parameter qshows a transition of the universe from initial decelerating phase to present accelerating phase [27][28][29][30][31][32][33][34]. For the acceleration of the universe it is required that the parameter q lies between −1 < q < 0 and for decelerating universe condition is q > 0.…”

“…From the observations of the researchers it is found that the deceleration parameter q shows a transition of the universe from initial decelerating phase to present accelerating phase [27][28][29][30][31][32][33][34].…”