Azimuthally averaged radial profile of the “cool” temperature for the whole galaxy (black sqares) and the disk only (orange squares; see Sect. 6.2). For comparison, the “cool” dust temperatures for the dust that were calculated in Kramer et al. (2010) for a two-component modified blackbody model with β = 1.5 and the radial anulii 0 < R < 2 kpc, 2 < R < 4 kpc, and 4 < R < 6 kpc are also presented (red triangles).