Difference of alignment angle, α, between the minor axis of gas halos and all semi-axis of the DM (left panel) and star halos (right panel). The solid lines indicate the median values of α, whilst the shading denotes the 25th–75th quartiles. The values are shown as a function of the total mass (M_tot). The red, blue, and green curves correspond to the difference of alignment of the gas minor axis with respect to the minor, intermediate, and major axes, respectively.