Ratio between dust masses derived from MBB fits to the 100−500 μm SEDs of KINGFISH galaxies, M_d(MBB), and those obtained using a dust emission model, M_d(model). In the left panels, M_d(model) is obtained by D12 applying the DL07 method to the whole dust SED. In the central panels, M_d(model) comes from a simplified application of the DL07 approach to just the Herschel 100−500 μm SED; the same in the right panels, but using the dust properties from C11 (see text for details). In the top panels, M_d(MBB) is derived using a power-law fit to the dust absorption cross section from D03 (left and center) and from C11 (right). In the bottom panels, the spectral index is changed from the fitted value to β = 1.5. Dashed lines show the median value of the ratios. Open circles (and the dotted line) refer to the case for β = 1.5 after correcting the κ_abs normalization (see Sect. 3 for details).