Eigenvalues ratios, b/a and c/a, as a function of the logarithm of the stellar mass (M_★). Left panel: Eigenvalues ratios, b/a vs. c/a, in bins of the logarithm of stellar mass. Right panel: Median values of b/a (triangles) and c/a (circles) for equal bins of the logarithm of the stellar mass, as a function of the logarithm of the stellar mass. In both panels, each color corresponds to each stellar mass bin, as indicated by the legend.