Reaction rates (left) and normalized reaction rates to N_A⟨σv⟩)_CF88 (right), without (Hin; red curve) and with (HinRes; green curve) the added resonance. The reaction rate from the CF88 model is also presented (blue curve). The shaded areas around the curves are the uncertainties (see text). Orange hatched areas show the temperature region explored by the STELLA experiment. The black arrows show the regions where carbon fusion occurs, for two stellar models (12 and 25 M_⊙), for both the Hin and HinRes models (see Sect. 4 and Fig. 3).