Publication details

Cosmological Perturbations in Restricted f(R)-Gravity

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Year of publication 2017
Type Article in Periodical
Magazine / Source Physical review D
MU Faculty or unit

Faculty of Science

Keywords Horava-Lifshitz gravity; Cosmological Perturbations
Description We investigate the metric perturbations of the restricted f(R) theory of gravity in the cosmological context and explore the phenomenological implications of this model. We show that it is possible to construct a restricted model of gravity, in which the background equations are the same as the equations of motion which are derived from the Einstein-Hilbert action with the cosmological constant term. We argue that the deviation from the Einstein-Hilbert model emerges in the perturbed equations, for which we have a nonvanishing anisotropic stress. Further, with the help of the results of Planck data for the modified gravity, we obtain constraints on the parameters of the model.
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