Modification of the two layer model of Fig. 1 with different intrinsic spectral indices. The 10 K cold component has an intrinsic spectral index of β = 2.3. The warmer component is at a temperature of 11 K, 12 K, or 14 K (as indicated by the black labels) and has a spectral index β of 2.2, 2.1, and 2.0, respectively. The red circles correspond to these (T, β) values of the individual dust components.