Star formation rate versus brightness temperature of the 51 HLIRGs detected in LDHD image at the 5σ_rms level. Top: full sample, coloured according to the classification of Best et al. (in prep.). Bottom: showing only SFGs and unclassified sources; 27 in total. Left: SFR as estimated from the CyE95 model. Right: SFR estimated from the CiS12 model. Marginalised distributions over the SFR and brightness temperature are shown on top and to the right of each panel. The colours correspond to the colours of the points.