Mean stacked FIR SEDs of star-forming galaxies in our z = 1 sample, split into four mass bins. The broadband photometry (open diamonds) is taken from S15. The fit to the stacked measurements is performed using the dust models of Galliano et al. (2011). It is apparent from this figure that massive galaxies (in red) have a colder dust temperature. This can be clearly seen from the peak wavelength of the best-fit model, or indirectly from the flux ratio S₅₀₀/S₁₀₀.