As Fig. 1 but for three layers at 8 K, 10 K and 12 K. The central point corresponds to identical mass in each temperature component and the curves are obtained by scaling the relative mass of one component at a time. For the component that is being modified, the temperature is indicated in the figure (black labels) and the relative mass is shown for a few positions along the resulting curves (gray labels). All components have the same spectral index, β = 2.0.