Fig. 9

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Model uncertainties for three stellar atmospheric parameters: Teff (left panel), log g (middle panel), and [Fe/H] (right panel). Kernel density estimation (KDE) is used to approximate the probability density functions of model uncertainties. Areas of darker color represent regions of lower probability densities, while lighter areas indicate higher probability densities. The red solid lines show second-order polynomial regression curves, that delineate the trend between uncertainties and atmospheric parameters. The red shaded area corresponds to the 95% confidence interval of the regression. Its width represents the size of confidence interval and the variation reflects changes in predictive uncertainty as a function of atmospheric parameters.
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