Background cosmological dynamics in f(R) gravity and observational constraints

Original · EN

In this paper, we carry out a study of viable cosmological models in f(R)-gravity at the background level. We use observable parameters like Ω and γ to form autonomous system of equations and show that the models under consideration exhibit two different regimes in their time evolution, namely, a phantom phase followed by a quintessence like behavior. We employ statefinder parameters to emphasize a characteristic discriminative signature of these models.