Autocorrelations of the lines Hα, Hβ, and Hγ. The color indicates the value of the Pearson correlation coefficient. The lines were smoothed to R ∼ 40 000 to remove some of the noisy features. The lack of correlation between the wings and the core suggests that the lines may be made of two subcomponents. Overplotted in blue and green are the two subcomponent decompositions obtained in Section 4.5, explaining the features of the autocorrelation. The correlation diagrams for the higher order lines have the same overall shape as Hβ and Hγ.