Dynamical stability in scalar-tensor cosmology

Abstract

We study FRW cosmology for a double scalar - tensor theory of gravity where two scalar fields are nonminimally coupled to the geometry. In a framework to study stability and attractor solutions of the model in the phase space, we constraint the model parameters with the observational data. For an accelerating universe, the model behaves like quintom dark energy models and predicts a transition from quintessence era to phantom era.

10 pages, 6 figures, to appear in Astrophysics and space sci.

References in corpus (5)

• The holographic dark energy in non-flat Brans-Dicke cosmology
• Coupled oscillators as models of quintom dark energy
• Holographic dark energy in Brans-Dicke cosmology with chameleon scalar field
• A new approach in stability analysis: case study: tachyon cosmology with non-minimally coupled scalar field-matter
• Stability analysis in Modified Non-Local Gravity

Cited by in corpus (3)

• Brans--Dicke cosmology does not have the $\Lambda$CDM phase as an universal attractor
• The Chameleon Effect in the Jordan Frame of the Brans--Dicke Theory
• Varying alpha and cosmic acceleration in Brans-Dicke-BSBM theory: stability analysis and observational tests