Behavior of the self-similar function f vs. the variable ξ defined in Equation (57). Different panels correspond to different values of the power-law parameters d and p: (a) gas pressure-dominated case with κ = κ _es, (b) gas pressure-dominated case with κ = κ _ff. Various curves represent the run of f(ξ) for different boundary conditions imposed at the inner edge, allowing for the possibility of mass inflow past the secondary orbit: .