The dust-temperature profiles in the envelope of Betelgeuse as modeled with mcmax (Min et al. 2009). The different lines indicate the dust temperature of a specific dust species: red for amorphous silicates and blue for metallic iron. The full black line gives the mean dust temperature profile, assuming thermal contact between iron and amorphous silicate grains. The green lines show a power-law distribution for the dust temperature for β = 1. The vertical dashed line indicates the inner radius of the dust shell.