Cosmic Acceleration and Brans-Dicke Theory
M. Sharif, Saira Waheed
TL;DR
This paper investigates cosmic acceleration within Brans-Dicke theory using different cosmological models, finding that accelerated expansion can occur for higher Brans-Dicke parameter values in certain scenarios.
Contribution
It explores the role of the Brans-Dicke parameter in cosmic acceleration across various universe models, including viscous and barotropic fluids, without relying on a potential.
Findings
Accelerated expansion possible for higher Brans-Dicke values
Deceleration parameter evaluated in different models
Cosmic acceleration achieved without potential
Abstract
This paper is devoted to study the accelerated expansion of the universe by exploring the Brans-Dicke parameter in different eras. For this purpose, we take FRW universe model with viscous fluid (without potential) and Bianchi type I universe model with barotropic fluid (with and without potential). We evaluate deceleration parameter as well as Brans-Dicke parameter to explore cosmic acceleration. It is concluded that accelerated expansion of the universe can also be achieved for higher values of the Brans-Dicke parameter in some cases.
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