Stability analysis and observational constraints in scalar tensor theory

Details Stability analysis and observational constraints in scalar tensor theory Stability analysis and observational constraints in scalar tensor theory

2011-11-02

arxiv.org/abs/1111.0467v1

JCAP11(2011)018

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

17 pages, 20 figures, To be published in JCAP

Scientific paper

10.1088/1475-7516/2011/11/018

We study FRW cosmology for scalar tensor theory where two scalar functions nonminimally coupled to the geometry and matter Lagrangian. In a framework to study stability and attractor solutions of the model in the phase space, we simultaneously solve the dynamical system and best fit the stability and model parameters with the observational data. The approach imposes restrictions on the model constraints while providing information about the universe dynamics. The model predict current accelerating universe, with a phantom crossing in near future.

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