Similar to the left panel of Figure  1, but for the NS–BH case. M _torus is shown as a function of the NS compactness C _NS and mass ratio 1/ q ≡ M _BH/ M _NS. M _torus is computed using Equation (3). Each panel assumes a different value for the dimensionless spin of the BH, χ. In all cases, we assume M _NS = 1.4  M _☉. The dotted lines are the isocontours corresponding to the M _torus values in Table 1.