SFEs for the models with M_bh = 10⁸   M_⊙ and UV = 0. The ratio of the total sink particle mass over the total initial gas mass is plotted against time (in free-fall units). Note that the y-axis range in this figure differs from the other (SFE) figures. From left to right, the cosmic ray rate increases from 1, 100 to 3000  ×    Galactic. From top to bottom, the X-ray flux increases from 0 to 160 erg   s^-1   cm^-2. The total number of sink particles formed during the run is given in the upper left corner of each panel.