Decaying Dark Energy in Higher-Dimensional Gravity
Abstract
We use data from observational cosmology to put constraints on higher-dimensional extensions of general relativity in which the effective four-dimensional dark-energy density (or cosmological "constant") decays with time. In particular we study the implications of this decaying dark energy for the age of the universe, large-scale structure formation, big-bang nucleosynthesis and the magnitude-redshift relation for Type Ia supernovae. Two of these tests (age and the magnitude-redshift relation) place modest lower limits on the free parameter of the theory, a cosmological length scale L akin to the de Sitter radius. These limits will improve if experimental uncertainties on supernova magnitudes can be reduced around z=1.
Keywords
Cite
@article{arxiv.0707.3148,
title = {Decaying Dark Energy in Higher-Dimensional Gravity},
author = {J. M. Overduin and P. S. Wesson and B. Mashhoon},
journal= {arXiv preprint arXiv:0707.3148},
year = {2009}
}
Comments
11 pages, 5 figures, submitted to A&A