Study on Anisotropic Dark Energy Cosmological Models in Generalized Brans-Dicke Theory

Abstract

In this present paper, we have investigated the dark energy cosmological model in Bianchi−V I0 spacetime by considering generalised Brans-Dicke theory, self-interacting potential, and a dynamical coupling parameter. For this purpose, we have utilised a hybrid scale factor to approximate the dynamical behaviour of the deceleration parameter. The deceleration parameter should display distinctive flipping behaviour at the transition redshift since the universe is thought to have changed from an early deceleration to a late temporal acceleration. We have studied six alternative transitioning dark energy models on the basis of observational restrictions on the transition redshift. For each model, the behaviour of the dynamical scalar field, the Brans-Dicke parameter, and the self-interacting potential are examined. On top of that, we used the generalised Brans-Dicke theory to estimate how the Newtonian gravitational constant changes over time.

Keywords

• generalized brans-dicke theory
• hybrid scale factor
• skewness parameter
• unified dark fluid