Speaker
Description
An analysis of the late-time evolution of the Universe for an f(R)-gravity model built from an exponential function of the scalar curvature is presented. The corresponding field equations, written in terms of a suited statefinder function are solved numerically, allowing to study the evolution of interesting cosmological parameters, which present values (at z = 0), are shown to be compatible with Planck 2018 observations and the ΛCDM–model values. Finally, considering updated measurements from the dynamics of the expansion of the Universe, H(z), we perform a statistical analysis to constrain the free parameters of the model, finding a particular set of values that fit the data well and predict acceptable values for the cosmological and statefinder parameters at present time. We conclude that this f(R)-gravity model is consistent with the considered observational data, and a viable alternative to explain the late-time acceleration of the Universe.
