Fig. E.1.

Modified black body results. The SUEs show the relation between the temperature, Td, and the emissivity index, β, derived from the β-free MBB run presented in Sect. 3.3.2. Galaxies are color-coded according to their type (cf. Sect. 3.3.2). The diffuse ISM of the Milky Way ( K, βMW = 1.6; Planck Collaboration XI 2014) is displayed as a yellow star.
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