Are f(R) dark energy models cosmologically viable ?

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dc.creatorAmendola, Luca
dc.creatorPolarski, David
dc.creatorTsujikawa, Shinji
dc.date2006-03-27
dc.date2007-02-27
dc.date.accessioned2026-07-07T11:25:25Z
dc.date.available2026-07-07T11:25:25Z
dc.descriptionAll $f(R)$ modified gravity theories are conformally identical to models of quintessence in which matter is coupled to dark energy with a strong coupling. This coupling induces a cosmological evolution radically different from standard cosmology. We find that in all $f(R)$ theories that behave as a power of $R$ at large or small $R$ (which include most of those proposed so far in the literature) the scale factor during the matter phase grows as $t^{1/2}$ instead of the standard law $t^{2/3}$. This behaviour is grossly inconsistent with cosmological observations (e.g. WMAP), thereby ruling out these models even if they pass the supernovae test and can escape the local gravity constraints.
dc.description4 pages; v2: revised figure and minor changes to match version accepted on Phys. Rev. Lett
dc.identifierhttps://arxiv.org/abs/astro-ph/0603703
dc.identifierhttp://arxiv.org/abs/astro-ph/0603703
dc.identifierPhys.Rev.Lett.98:131302,2007
dc.identifierdoi:10.1103/PhysRevLett.98.131302
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/195502
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.titleAre f(R) dark energy models cosmologically viable ?
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