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- Title
Role of a chameleon field in the presence of variable modified Chaplygin gas in Brans-Dicke theory.
- Authors
Chakraborty, Shuvendu; Debnath, Ujjal
- Abstract
In this work, we have considered the Friedmann-Robertson-Walker model of the universe for Brans-Dicke (BD) theory with a BD scalar field as a chameleon field. First we have transformed the field equations and conservation equation from Jordan's frame to Einstein's frame. We have shown that, in the presence of a variable modified Chaplygin gas (VMCG), the potential function V and another analytic function f always increase with respect to the BD-chameleon scalar field but decrease with time t for pure Chaplygin gas, modified Chaplygin gas, and VMCG models.
- Subjects
PHOTONS; MATHEMATICAL variables; MAGNETIC fields; MATHEMATICAL models; METAPHYSICAL cosmology; MATHEMATICAL transformations
- Publication
Canadian Journal of Physics, 2012, Vol 90, Issue 2, p131
- ISSN
0008-4204
- Publication type
Article
- DOI
10.1139/p11-150