The Bianchi type-V Dark Energy Cosmology in Self Interacting Brans Dicke Theory of Gravity

TL;DR

This study explores anisotropic Bianchi type-V cosmological models within self-interacting Brans-Dicke gravity, analyzing dark energy with variable EoS and constant deceleration, and compares power law and exponential universe models with observational data.

Contribution

It introduces new anisotropic cosmological solutions in self-interacting Brans-Dicke theory with variable dark energy EoS and examines their physical viability.

Findings

EoS parameter range aligns with recent observations

The model with {}(t) = log(k1t) effectively explains universe evolution

Both models exhibit prominent features but have limitations

Abstract

This paper deals with a spatially homogeneous and totally anisotropic Bianchi type-V cosmological model within the framework of self interacting Brans Dicke theory of gravity in the background of anisotropic dark energy (DE) with variable equation of state (EoS) parameter and constant deceleration parameter. Constant deceleration parameter leads to two models of universe, i.e. power law model and exponential model. EoS parameter {\omega} and its existing range for the models is in good agreement with the most recent observational data. We notice that {\omega} given by (37) i.e {\omega}(t) = log(k1t) is more suitable in explaining the evolution of the universe. The physical behaviors of the solutions have also been discussed using some physical quantities. Finally, we observe that despite having several prominent features, both of the DE models discussed fail in details.