Equilibrium values of the ¹⁶O/¹⁷O vs. temperature (see Eq. (1)). The black curve was obtained by adopting the revised rate of the ¹⁷O(p, α)¹⁴N reaction (median values of Bruno et al. 2016) and the two black dashed lines show the recommended maximum and minimum values compatible with the experimental data, which corresponds to the 1σ error bar of the measured nuclear cross section. For comparisons, the blue, red, and green lines show the results obtained by adopting the ¹⁷O(p, α)¹⁴N rate from Buckner et al. (2015), Iliadis et al. (2010), and Angulo et al. (1999), respectively.