Sub-samples extracted from the entire dataset of the SAM- CMASS mock galaxy catalogue, Gal-dens, as described in Table 1 and represented by coloured contours in the sSFR-M_∗ parameter space at z_ref = 0.56. The number density distribution of the entire dataset is depicted as, logarithmically binned hexagons in the background. The horizontal solid red line marks the classic quiescent separation, log₁₀(sSFR [yr]) ~ –11 (Franx et al. 2008).