PT Journal
AU Girones, Z
   Marchetti, A
   Mena, O
   Pena-Garay, C
   Rius, N
TI Cosmological data analysis of f(R) gravity models
SO Journal of Cosmology and Astroparticle Physics
JI J. Cosmol. Astropart. Phys.
PY 2010
BP 004
EP 18pp
VL 11
IS 11
DI 10.1088/1475-7516/2010/11/004
LA English
DE modified gravity; cosmological parameters from LSS
AB A class of well-behaved modified gravity models with long enough matter domination epoch and a late-time accelerated expansion is confronted with SNIa, CMB, SDSS, BAO and H(z) galaxy ages data, as well as current measurements of the linear growth of structure. We show that the combination of geometrical probes and growth data exploited here allows to rule out f(R) gravity models, in particular, the logarithmic of curvature model. We also apply solar system tests to the models in agreement with the cosmological data. We find that the exponential of the inverse of the curvature model satisfies all the observational tests considered and we derive the allowed range of parameters. Current data still allows for small deviations of Einstein gravity. Future, high precision growth data, in combination with expansion history data, will be able to distinguish tiny modifications of standard gravity from the Lambda CDM model.
ER