Corner plot showing the marginalized 1D and 2D posterior probability distributions (PPDs) for the parameters in the CLOUDY models used to fit the emission line ratios of W2246–0526. The orange solid lines indicate the parameter values of the best model (maximum likelihood estimation, MLE), the blue dashed line the median of each parameter marginalized over the rest, and the blue shaded region the 68% confidence interval. The y-axes of the 1D PPDs show the probabilities with their sum normalized to one for each parameter.