Distribution of the f_Edd over the central black hole mass M_BH of the sample of fast (left) and slow (right) field QGs at the quenched stage. The colour coding shows the median dust fraction f_dust computed for the quenched stage (that is, at the P3 evolutionary point). The vertical dashed line represents the lower mass limit for the activation of jet mode in SIMBA (M_BH = 10^7.5). The dashed horizontal line delimits the starting of the transition from a radiative feedback mode to a jet mode (f_Edd = 0.2), while the dashed-dotted line delimits the region with fully set jet mode (f_Edd < 0.02). The red and blue contours represent the 50 and 90 percentile levels for the slow and fast quenching sub-samples respectively.