Epoch Dependent Dark Energy
High Energy Physics - Phenomenology
2012-08-27 v1 Cosmology and Nongalactic Astrophysics
Nuclear Theory
Abstract
We present a model in which the equation of state parameter w approaches -1 near a particular value of z, and has significant negative values in a restricted range of z. For example, one can have w ~ -1 near z = 1, and w > -0.2 from z = 0 to z = 0.3, and for z > 9. The ingredients of the model are neutral fermions (which may be neutrinos, neutralinos, etc) which are very weakly coupled to a light scalar field. This model emphasises the importance of the proposed studies of the properties of dark energy into the region z > 1.
Keywords
Cite
@article{arxiv.0908.0969,
title = {Epoch Dependent Dark Energy},
author = {B. H. J. McKellar and T. Goldman and G. J. Stephenson, and P. M. Alsing},
journal= {arXiv preprint arXiv:0908.0969},
year = {2012}
}
Comments
7pp., 2 figs. Invited talk at the 5th Int'l. Wkshp. on the Dark Side of the Universe, 1-5 June 2009 Melbourne, DSU09; to appear in the proceedings