Gravitational energy as dark energy: Average observational quantities

Details Gravitational energy as dark energy: Average observational quantities Gravitational energy as dark energy: Average observational quantities

2009-12-29

arxiv.org/abs/0912.5236v1

AIP Conf.Proc.1241:1182-1191,2010

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

10 pages, 7 figures; submitted to the Proceedings of the Invisible Universe Conference, Paris, 29 June - 3 July, 2009; J.-M. A

Scientific paper

10.1063/1.3462616

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.

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