An Interacting model of Dark Energy in Brans-Dicke theory

Abstract

In this paper it is shown that in non-minimally coupled Brans-Dicke theory containing a self-interacting potential, a suitable conformal transformation can automatically give rise to an interaction between the normal matter and the Brans-Dicke scalar field. Considering the scalar field in the Einstein frame as the quintessence matter, it has been shown that such a non-minimal coupling between the matter and the scalar field can give rise to a late time accelerated expansion for the universe preceded by a decelerated expansion for very high values of the Brans-Dicke parameter $\omega$. We have also studied the observational constraints on the model parameters considering the Hubble and Supernova data.

12 pages, 15 figures. Accepted for publication in Astrophysics and Space Science

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• Time Evolution of the Matter Content of the Expanding Universe in the Framework of Brans-Dicke Gravity
• A Study on the Expanding Universe Based on a Model of the Time Variation of its Matter Content in the Framework of Brans-Dicke Theory
• Interacting tachyon with varying mass dark matter