Border lines for feeding the central 1 pc in the (R, z) plane. Black continuous line: R_L = 1 pc line separating the low and high angular momentum places. Colors represent different values of n_out in particles per cm³: blue – 10³; black – 10⁴; red – 10⁵, with M_SMBH = 4 × 10⁶M_⊙ and the NSC as given in Sect. 2. The open symbols show feeding of the central 1 pc by SNe shell elements, solid symbols show feeding by supersonic elements only. The thin dashed lines give places of constant r_GC (in 5 pc steps) and θ_GC (in 10° steps).