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Structure formation as an alternative to dark energy and modified gravity

Published online by Cambridge University Press:  30 May 2009

E. Pécontal ,
T. Buchert ,
Ph. Di Stefano ,
Y. Copin  and
S. Räsänen
S. Räsänen*
Affiliation:
Université de Genève, Département de Physique Théorique, 24 quai Ernest-Ansermet, 1211 Genève 4, Switzerland
*
[email protected]
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Abstract

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.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 36: Dark Energy and Dark Matter: Observations, Experiments and Theories , 2009 , pp. 63 - 74
Copyright
© EAS, EDP Sciences, 2009

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References

Bardeen, J.M., Bond, J.R., Kaiser, N., & Szalay, A.S., 1986, ApJ, 304, 15 CrossRef
Bonvin, C., Durrer, R., & Gasparini, M.A., 2006, Phys. Rev. D, 73, 023523 arXiv:astro-ph/0511183 CrossRef
Buchert, T., 2000, Gen. Rel. Grav., 32, 105 [arXiv:gr-qc/9906015] CrossRef
Chuang, C.H., Gu, J.A., & Hwang, W.Y., 2008, Class. Quant. Grav., 25, 175001 [arXiv:astro-ph/0512651] CrossRef
Dodelson, S., 2003, Modern Cosmology (Academic Press, United States), 245
Ellis, G.F.R., 1984, Relativistic cosmology: its nature, aims and problems, The invited papers of the 10th international conference on general relativity and gravitation, 215
Hogg, D.W., et al., 2005, ApJ, 642, 54 arXiv:astro-ph/0411197 CrossRef
Kai, T., Kozaki, H., Nakao, K.-i., Nambu, Y., & Yoo, C.M., 2007, Prog. Theor. Phys., 117, 229 arXiv:gr-qc/0605120 CrossRef
Komatsu, E., et al., WMAP Collaboration arXiv:0803.0547 [astro-ph]
Paranjape, A., & Singh, T.P., 2006, Class. Quant. Grav., 23, 6955 arXiv:astro-ph/0605195 CrossRef
Pueblas, S., & Scoccimarro, R. arXiv:0809.4606 [astro-ph]
Reynaud, S., & Jaekel, M.-T. arXiv:0801.3407 [gr-qc]
Räsänen, S., 2006, Int. J. Mod. Phys., D, 15, 2141 arXiv:astro-ph/0605632
Räsänen, S., JCAP11(2006)003 arXiv:astro-ph/0607626
Räsänen, S., JCAP04(2008)026 arXiv:0801.2692 [astro-ph]
Räsänen, S., arXiv:0805.2670 [astro-ph]
Sheth, R.K., & van de Weygaert, R., 2004, Mon. Not. Roy. Astron. Soc., 350, 517 arXiv:astro-ph/0311260 CrossRef