Same as Fig. C.1 but for η, which determines the split of stellar halo mass between central and satellite galaxies for M >  M_*, where M_* = 10^12.5 h⁻¹ M_⊙ in this figure. In the lower-right panel we see that increasing η from the fiducial −0.3 means that more mass is put into central galaxies, whereas decreasing it places more mass in satellites. As a result of this, the amplitude of the stellar halo is changed, as can be seen in the top-right panel, with decreasing η putting more mass into the NFW part of the profile and thus boosting the halo amplitude. This has a scale-dependent effect on the matter–stars power spectrum, as can be seen in the top-left two panels.