Attractors, Statefinders and Observational Measurement for Chameleonic Brans--Dicke Cosmology

Details Attractors, Statefinders and Observational Measurement for Chameleonic Brans--Dicke Cosmology Attractors, Statefinders and Observational Measurement for Chameleonic Brans--Dicke Cosmology

2010-10-18

arxiv.org/abs/1010.3589v4

JCAP 1011:006,2010

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

28 pages, 38 figures

Scientific paper

10.1088/1475-7516/2010/11/006

We investigate chameleonic Brans--Dicke model applied to the FRW universes. A framework to study stability and attractor solutions in the phase space is developed for the model. We show that depending on the matter field and stability conditions, it is possible to realize phantom-like behavior without introducing phantom filed in the model while the stability is fulfilled and phantom crossing occurs. The statefinder parameters to the model for different kinds of matter interacting with the chameleon scalar field are studied. We also compare our model with present day observations.

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