Gravitational energy as dark energy: Towards concordance cosmology without Lambda
arXiv:0912.5234 · doi:10.1051/eas/0936011
Abstract
I briefly outline a new physical interpretation to the average cosmological parameters for an inhomogeneous universe with backreaction. The variance in local geometry and gravitational energy between ideal isotropic observers in bound structures and isotropic observers at the volume average location in voids plays a crucial role. Fits of a model universe to observational data suggest the possibility of a new concordance cosmology, in which dark energy is revealed as a mis-identification of gravitational energy gradients that become important when voids grow at late epochs.
8 pages, 1 figure; in E. Pecontal, T. Buchert, Ph. Di Stefano and Y. Copin (eds), "Dark Energy and Dark Matter: Observations, Experiments and Theories", Proceedings, Lyon, 7-11 July, 2008
References in corpus (7)
- Improved Distances to Type Ia Supernovae with Multicolor Light Curve Shapes: MLCS2k2
- The Hubble Constant: A Summary of the HST Program for the Luminosity Calibration of Type Ia Supernovae by Means of Cepheids
- Cosmic clocks, cosmic variance and cosmic averages
- Exact solution to the averaging problem in cosmology
- Scale dependence of cosmological backreaction
- Cosmological equivalence principle and the weak-field limit
- Gravitational energy as dark energy: Concordance of cosmological tests