Distribution of the loading factor parameter λ for the galaxies of Fig. 2 computed at redshifts z = 2.2, z = 0.8, z = 0.4, and z = 0.1 for two different bins of stellar mass. The left panels show distributions for objects with stellar mass log(M_⋆/M_⊙) < 10, and the right panels indicate distributions for stellar mass log(M_⋆/M_⊙) > 10. The yellow vertical lines indicate the median values of each distribution.