Left: fraction of sources (i.e., completeness) in a given SFR–M_∗ bin with individual PACS/SPIRE detections and accurate dust temperature estimates. Right: SFR–M_∗ bins with accurate dust temperature estimates (i.e., completeness =100%), as inferred from our stacking analysis. Because each SFR–M_∗ bin corresponds to only one set of stacked FIR flux densities and thus one dust temperature estimate, here the completeness can only take two different values: 0% if the dust temperature estimate is inaccurate; 100% if the dust temperature estimate is accurate. The quality of our dust temperature estimates were evaluated using criteria presented in Sects. 3.1 and 3.2. Short-dashed lines on a white background show the MS of star formation.