https://doi.org/10.1140/epjc/s10052-010-1324-4
Regular Article - Theoretical Physics
The growth factor of matter perturbations in f(R) gravity
1
Department of Physics and Institute of Physics, Hunan Normal University, Changsha, Hunan, 410081, China
2
Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of Education, Hunan Normal University, Changsha, Hunan, 410081, China
* e-mail: hwyu@hunnu.edu.cn
Received:
12
March
2010
Revised:
31
March
2010
Published online:
29
April
2010
The growth of matter perturbations in the f(R) model proposed by Starobinsky is studied in this paper. Three different parametric forms of the growth index are considered respectively, and constraints on the model are obtained at both the 1σ and 2σ confidence levels, by using the current observational data for the growth factor. It is found, for all the three parametric forms of the growth index examined, that the Starobinsky model is consistent with the observations only at the 2σ confidence level.
© Springer-Verlag / Società Italiana di Fisica, 2010
