Bulk viscous cosmological model in Brans Dicke theory with new form of time varying deceleration parameter

TL;DR

This paper develops a cosmological model within Brans-Dicke theory incorporating a new deceleration parameter, bulk viscosity, and Chaplygin gas, analyzing their combined effects on cosmic evolution.

Contribution

It introduces a novel form of the deceleration parameter and explores their implications in a Brans-Dicke cosmological framework with bulk viscosity.

Findings

The model exhibits accelerated expansion consistent with observations.

Bulk viscosity influences the universe's expansion rate.

The proposed deceleration parameter affects the transition from deceleration to acceleration.

Abstract

In this article we have presented FRW cosmological model in the framework of Brans-Dicke theory. This paper deals with a new proposed form of deceleration parameter and cosmological constant. The effect of bulk viscosity is also studied in the presence of modified Chaplygin gas equation of state. Further, we have discussed the physical behaviors of the models.