Brans-Dicke Theory in Anisotropic Model with Viscous Fluid

TL;DR

This paper explores an anisotropic cosmological model within Brans-Dicke theory, demonstrating that causal viscous fluids can lead to late-time acceleration of the universe, with specific anisotropic conditions influencing acceleration.

Contribution

It introduces an anisotropic universe model with viscous and barotropic fluids in Brans-Dicke theory, highlighting conditions for acceleration based on anisotropic scale factors.

Findings

Causal viscous fluids induce late-time acceleration.

Anisotropic conditions can lead to acceleration in specific directions.

The model supports acceleration regardless of the type of fluid.

Abstract

In this paper we have considered an anisotropic space-time model of the Universe in presence of Brans-Dicke (BD) scalar field $\phi$, causal viscous fluid and barotropic fluid. We have shown that irrespective of fluid the causality theory provides late time acceleration of the Universe. If the deceleration occurs in radial direction and acceleration occurs in transverse direction then the anisotropic Universe will accelerate for a particular condition of the power law representation of the scale factors.