A cosmic vector for dark energy
Astrophysics
2008-12-18 v2 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
In this work we show that the presence of a vector field on cosmological scales could explain the present phase of accelerated expansion of the universe. The proposed theory contains no dimensional parameters nor potential terms and does not require unnatural initial conditions in the early universe, thus avoiding the so called cosmic coincidence problem. In addition, it fits the data from high-redshift supernovae with excellent precision, making definite predictions for cosmological parameters. Upcoming observations will be able to clearly discriminate this model from standard cosmology with cosmological constant.
Keywords
Cite
@article{arxiv.0801.1486,
title = {A cosmic vector for dark energy},
author = {Jose Beltran Jimenez and Antonio L. Maroto},
journal= {arXiv preprint arXiv:0801.1486},
year = {2008}
}
Comments
5 pages, 3 figures, 1 table. New comments and references included. Final version to appear in Phys. Rev. D