Constraints on Non-Flat Starobinsky f(R) Dark Energy Model

We study the viable Starobinsky [Formula: see text] dark energy model in spatially non-flat FLRW backgrounds, where [Formula: see text] with [Formula: see text] and [Formula: see text] representing the characteristic curvature scale and model parameter, respectively. We modify CAMB and CosmoMC packages with the recent observational data to constrain Starobinsky [Formula: see text] gravity and the density parameter of curvature [Formula: see text]. In particular, we find the model and density parameters to be [Formula: see text] at 68% C.L. and [Formula: see text] at 95% C.L., respectively. The best [Formula: see text] fitting result shows that [Formula: see text] , indicating that the viable [Formula: see text] gravity model is consistent with [Formula: see text] CDM when [Formula: see text] is set as a free parameter. We also evaluate the values of AIC, BIC and DIC for the best fitting results of [Formula: see text] and [Formula: see text] CDM models in the non-flat universe.