Cosmology of the selfaccelerating third order Galileon
Cosmology and Nongalactic Astrophysics
2011-01-04 v1 High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
In this paper we start from the original formulation of the galileon model with the original choice for couplings to gravity. Within this framework we find that there is still a subset of possible Lagrangians that give selfaccelerating solutions with stable spherically symmetric solutions. This is a certain constrained subset of the third order galileon which has not been explored before. We develop and explore the background cosmological evolution of this model drawing intuition from other even more restricted galileon models. The numerical results confirm the presence of selfacceleration, but also reveals a possible instability with respect to galileon perturbations.
Cite
@article{arxiv.1009.6151,
title = {Cosmology of the selfaccelerating third order Galileon},
author = {David F. Mota and Marit Sandstad and Tom Zlosnik},
journal= {arXiv preprint arXiv:1009.6151},
year = {2011}
}
Comments
30 pages, 24 figures