( a) Concentration c plotted against the maximum half-mass radius R _h,max normalized by the halo virial radius R _v (left). ( b) The subhalo abundance N _>0.10 plotted against the maximum half-mass radius R _h,max normalized by the halo virial radius R _v (right). Black circles, white circles, and crosses denote the halos with 2.5 × 10 ¹²  M _☉ ⩽ M < 3 × 10 ¹²  M _☉, 2.0 × 10 ¹²  M _☉ ⩽ M < 2.5 × 10 ¹²  M _☉, and 1.5 × 10 ¹²  M _☉ ⩽ M < 2.0 × 10 ¹²  M _☉, respectively.