Cosmic Dynamics in the Chameleon Cosmology

Abstract

We study in this paper chameleon cosmology applied to Friedmann-Robertson-Walker space, which gives rise to the equation of state (EoS) parameter larger than -1 in the past and less than -1 today, satisfying current observations. We also study cosmological constraints on the model using the time evolution of the cosmological redshift of distant sources which directly probes the expansion history of the universe. Due to the evolution of the universe's expansion rate, the model independent Cosmological Redshift Drift (CRD)test is expected to experience a small, systematic drift as a function of time. The model is supported by the observational data obtained from the test.

16 pages, 9 figures

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Cited by in corpus (25)

• Modified Gravity and Cosmology
• Cosmological Evolution With Interaction Between Dark Energy And Dark Matter
• Chameleons with Field Dependent Couplings
• Attractors, Statefinders and Observational Measurement for Chameleonic Brans--Dicke Cosmology
• Generalized second law of thermodynamics in scalar-tensor gravity
• Stability analysis and Observational Measurement in Chameleonic Generalised Brans--Dicke Cosmology
• Chameleon stars
• Cosmic Dynamics in $F(R,\varphi )$ Gravity
• Wormhole solutions supported by interacting dark matter and dark energy
• The generalized second law in chameleon cosmology
• Chameleon Cosmology Model Describing the Phantom Divide Line Crossing
• Relativistic polytropic spheres embedded in a chameleon scalar field
• Interacting agegraphic dark energy model in tachyon cosmology coupled to matter
• Entropy and statefinder diagnosis in chameleon cosmology
• Stability analysis in Modified Non-Local Gravity
• The universe dynamics in the tachyon cosmology with non-minimal coupling to matter
• Cosmic acceleration and ekpyrotic bounce with Chameleon field
• Nonrelativistic isothermal fluid in the presence of a chameleon scalar field: Static and collapsing configurations
• Stability analysis of agegraphic dark energy in Brans-Dicke cosmology
• Dynamics of the self-interacting chameleon cosmology
• Chameleon gravity on cosmological scales
• Chameleon stars supported by a cosmological scalar field
• Chameleon dark matter stars
• Observational constraints in scalar tensor theory with tachyonic potential
• Geometric and thermodynamic properties in Gauss-Bonnet gravity