Chamelionic generalized Brans-Dicke cosmology

Details Chamelionic generalized Brans-Dicke cosmology Chamelionic generalized Brans-Dicke cosmology

Feb 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012epjp..127...23e&link_type=abstract

The European Physical Journal Plus, Volume 127, article id. #23

Mathematics

Logic

Scientific paper

We discuss the late-time dynamics of a chameleonic generalized Brans-Dicke cosmology with the power law chameleonic function f ( φ) ∝ φ n , where n is a real parameter motivated from string theories by conjecturing that the four-dimensional Hubble parameter varies with a scale factor like φ = ξa m , where ( ξ, m) are real parameters. For some critical values of m, n and the Brans-Dicke parameter, it was observed that the universe is free from the initial singularity. Both singularity-free and singular cosmological scenarios are discussed. Several cosmological tests like the physical cosmological distances and the statefinder parameters are discussed.

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