Late-time acceleration in the coupled Cubic Galileon models

Abstract

We investigate the linearly and quadratically coupled cubic Galileon models that include linear potentials. These models may explain the late-time acceleration. In these cases, we need two equations of state parameter named the native and effective equations of state to test whether the universe is accelerating or not because there is coupling between the cold dark matter and Galileon. It turns out that there is no transition from accelerating phase to phantom phase in the future.

14pages, 5figures, version to appear in PRD

References in corpus (7)

• Cosmology and the Fate of Dilatation Symmetry
• Covariant Galileon
• Galileon Cosmology
• Observational constraints on Galileon cosmology
• Dynamical analysis of generalized Galileon cosmology
• Equations of State in the Brans-Dicke cosmology
• Late time acceleration in a slow moving galileon field

Cited by in corpus (8)

• Selected topics in scalar-tensor theories and beyond
• Dynamical Analysis of an Integrable Cubic Galileon Cosmological Model
• Noether symmetries and stability of ideal gas solution in Galileon Cosmology
• On the phantom barrier crossing and the bounds on the speed of sound in non-minimal derivative coupling theories
• Noether symmetry in Horndeski Lagrangian
• Non-minimally coupled quintessence DE model with a cubic galileon term --A Dynamical System Analysis
• Brans-Dicke Galileon and the Variational Principle
• An issue with the classification of the scalar-tensor theories of gravity