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

Abstract

We 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.

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Publication Info

Year: 2006
Type: article
Volume: 454
Issue: 3
Pages: 707-714
Citations: 201
Access: Closed

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APA Style

                            
                                
                                    M Amarzguioui, 
                                
                                    Øystein Elgarøy, 
                                
                                    D.F. Mota
                                
                                et al.
                            
                            (2006). 
                            Cosmological constraints on <i>f</i>(<i>R</i>) gravity theories within the Palatini approach. 
                            Astronomy and Astrophysics
                            , 454
                            (3)
                            , 707-714.
                            https://doi.org/10.1051/0004-6361:20064994
                        

Identifiers

DOI: 10.1051/0004-6361:20064994

Cosmological constraints on <i>f</i>(<i>R</i>) gravity theories within the Palatini approach