Light mass galileon and late time acceleration of the Universe

Abstract

We study Galileon scalar field model by considering the lowest order Galileon term in the lagrangian, $({\partial }_{\mu }\varphi {)}^2\square \varphi$ by invoking a field potential. We use Statefinder hierarchy to distinguish the light mass galileon models with different potentials amongst themselves and from the $\Lambda$CDM behaviour. The $Om$ diagnostic is applied to cosmological dynamics and observational constraints on the model parameters are studied using SN+Hubble+BAO data.

11 pages, 9 figures

References in corpus (13)

• Dynamics of dark energy
• Cosmology and the Fate of Dilatation Symmetry
• Two new diagnostics of dark energy
• Baryon Acoustic Oscillations in the Ly-α forest of BOSS quasars
• Galileon inflation
• Thawing quintessence with a nearly flat potential
• Observational constraints on Galileon cosmology
• Matter perturbations in Galileon cosmology
• Modified gravity a la Galileon: Late time cosmic acceleration and observational constraints
• Dynamical analysis of generalized Galileon cosmology
• The Statefinder hierarchy: An extended null diagnostic for concordance cosmology
• Phantom Dark Energy Models with a Nearly Flat Potential
• A new null diagnostic customized for reconstructing the properties of dark energy from BAO data

Cited by in corpus (1)

• Galileon versus Quintessence: A comparative phase space analysis and late-time cosmic relevance