Gravitational energy as dark energy: Average observational quantities
Cosmology and Nongalactic Astrophysics
2010-07-14 v1 General Relativity and Quantum Cosmology
Abstract
In the timescape scenario cosmic acceleration is understand as an apparent effect, due to gravitational energy gradients that grow when spatial curvature gradients become significant with the nonlinear growth of cosmic structure. This affects the calibratation of local geometry to the solutions of the volume-average evolution equations corrected by backreaction. In this paper I discuss recent work on defining observational tests for average geometric quantities which can distinguish the timescape model from a cosmological constant or other models of dark energy.
Cite
@article{arxiv.0912.5236,
title = {Gravitational energy as dark energy: Average observational quantities},
author = {David L. Wiltshire},
journal= {arXiv preprint arXiv:0912.5236},
year = {2010}
}
Comments
10 pages, 7 figures; submitted to the Proceedings of the Invisible Universe Conference, Paris, 29 June - 3 July, 2009; J.-M. Alimi (ed), AIP Conf. Proc., to appear