Scalar models for the unification of the dark sector
Cosmology and Nongalactic Astrophysics
2015-06-04 v1 General Relativity and Quantum Cosmology
Abstract
We review the difficulties of the generalized Chaplygin gas model to fit observational data, due to the tension between background and perturbative tests. We argue that such issues may be circumvented by means of a self-interacting scalar field representation of the model. However, this proposal seems to be successful only if the self-interacting scalar field has a non-canonical form. The latter can be implemented in Rastall's theory of gravity.
Keywords
Cite
@article{arxiv.1204.2298,
title = {Scalar models for the unification of the dark sector},
author = {Mahamadou H. Daouda and Julio C. Fabris and Oliver F. Piattella},
journal= {arXiv preprint arXiv:1204.2298},
year = {2015}
}
Comments
Latex file, 8 pages, 3 figures in eps format. To appear in the proceedings of the CosmoSul conference, held in Rio de Janeiro, Brazil, 01-05 august of 2011