Stability Analysis in Tachyonic Potential Chameleon cosmology

Details Stability Analysis in Tachyonic Potential Chameleon cosmology Stability Analysis in Tachyonic Potential Chameleon cosmology

2011-05-20

arxiv.org/abs/1105.4045v2

JCAP 05(2011)017

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

20 pages, 13 figures

Scientific paper

We study general properties of attractors for tachyonic potential chameleon scalar-field model which possess cosmological scaling solutions. An analytic formulation is given to obtain fixed points with a discussion on their stability. The model predicts a dynamical equation of state parameter with phantom crossing behavior for an accelerating universe. We constrain the parameters of the model by best fitting with the recent data-sets from supernovae and simulated data points for redshift drift experiment generated by Monte Carlo simulations.

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