| Issue |
EAS Publications Series
Volume 36, 2009
Dark Energy and Dark Matter: Observations, Experiments and Theories
|
|
|---|---|---|
| Page(s) | 63 - 74 | |
| DOI | https://doi.org/10.1051/eas/0936008 | |
| Published online | 30 May 2009 | |
Dark Energy and Dark Matter: Observations, Experiments and Theories
E. Pécontal, T. Buchert, Ph. Di Stefano and Y. Copin (eds)
EAS Publications Series, 36 (2009) 63-74
E. Pécontal, T. Buchert, Ph. Di Stefano and Y. Copin (eds)
EAS Publications Series, 36 (2009) 63-74
Structure formation as an alternative to dark energy and modified gravity
Université de Genève, Département de Physique Théorique, 24 quai Ernest-Ansermet, 1211 Genève 4, Switzerland
Corresponding author: syksy.rasanen@iki.fi
Observations are inconsistent with a homogeneous and iso-tropic universe with ordinary matter and gravity. The universe is far from exact homogeneity and isotropy at late times, and the effect of the non-linear structures has to be quantified before concluding that new physics is needed. We explain how structure formation can lead to accelerated expansion, and discuss a semi-realistic model where the timescale in the change in the expansion rate emerges from the physics of structure formation.
© EAS, EDP Sciences, 2009