Evolution of the Brans–Dicke Parameter in Generalized Chameleon Cosmology

Motivated by an earlier study of Sahoo and Singh Mod. Phys. Lett. A 17 (2002) 2409, we investigate the time dependence of the Brans–Dicke parameter ω(t) for an expanding Universe in the generalized Brans–Dicke Chameleon cosmology, and obtain an explicit dependence of ω(t) in different expansion phases of the Universe. Also, we discuss how the observed accelerated expansion of the observable Universe can be accommodated in the present formalism.