Cosmological constraints on f(R) gravity theories within the Palatini approach

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dc.creatorAmarzguioui, M.
dc.creatorElgaroy, O.
dc.creatorMota, D. F.
dc.creatorMultamaki, T.
dc.date2005-10-18
dc.date2006-04-18
dc.date.accessioned2026-07-07T10:27:40Z
dc.date.available2026-07-07T10:27:40Z
dc.descriptionWe investigate f(R) theories of gravity within the Palatini approach and show how one can determine the expansion history, H(a), for an arbitrary choice of f(R). As an example, we consider cosmological constraints on such theories arising from the supernova type Ia, large scale structure formation and cosmic microwave background observations. We find that best fit to the data is a non-null leading order correction to the Einstein gravity, but the current data exhibits no significant preference over the concordance LCDM model. Our results show that the often considered 1/R models are not compatible with the data. The results demonstrate that the background expansion alone can act as a good discriminator between modified gravity models when multiple data sets are used.
dc.description9 pages (A&A), 7 figures. Minor changes to text plus added some references. Accepted for publication in A&A
dc.identifierhttps://arxiv.org/abs/astro-ph/0510519
dc.identifierhttp://arxiv.org/abs/astro-ph/0510519
dc.identifierAstron.Astrophys.454:707-714,2006
dc.identifierdoi:10.1051/0004-6361:20064994
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/177218
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.titleCosmological constraints on f(R) gravity theories within the Palatini approach
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