Structure formation as an alternative to dark energy and modified gravity
Nov, 200812 pages
Part of Proceedings, Dark Energy and Dark Matter: Observations Experiments and Theories : Lyon, France, July 7-11, 2008, 63-74
Published in:
- EAS Publ.Ser. 36 (2009) 63-74
Contribution to:
- Published: May 30, 2009
e-Print:
- 0811.2364 [astro-ph]
DOI:
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Abstract: (European Astronomical Society)
Observations are inconsistent with a homogeneous andiso-tropic universe with ordinary matter and gravity.The universe is far from exact homogeneity and isotropyat late times, and the effect of the non-linearstructures has to be quantified before concludingthat new physics is needed.We explain how structure formation can lead to acceleratedexpansion, and discuss a semi-realistic model wherethe timescale in the change in the expansion rate emergesfrom the physics of structure formation.Note:
- 12 pages, 4 figures, contribution to the proceedings of the July 2008 CRAL-IPNL conference 'Dark Energy and Dark Matter'
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