Akaike Information Criterion test. Left panel: probability density function vs the (g′−i′)₀ color. The black line represents the best fit model, the dashed lines represent the two Gaussians described by the model. The color distribution is divided in bins according to the Freedman-Diaconis rule (Freedman & Diaconis 1981). Right panel: values of the Akaike Information Criterion (AIC) as a function of the number of components in the model.