JED solution domain in the ṁ-r plane. The solid line, corresponding to a jet power parameter b = 1, separates this plane into 2 regions: the top one where only the cold solution is valid and the bottom one where the 3 solutions exist. The region where only a hot solution is valid exists at very low accretion rate not shown in this figure. The limits for b = 0.5 are plotted in dashed lines. In this case the plane is divided into 3 parts with a region, for low accretion rate, where only the hot solution exists.