The total mass collected in a single expanding shell at the end of mass accumulation, m_{sh, tot}, as a functionof the galactocentric distance r_GC and the elevation angle θ_GC for n_out = 10³, 10⁴, and 10⁵ cm⁻³, with M_SMBH = 4 × 10⁶M_⊙ and the NSC as given in Sect. 2. The mass delivery to the central parsec is shown with hatching: the areas without hatching do not deliver any mass, single hatched areas deliver up to 10% of m_{sh, tot}, the double-hatched areas deliver more than 10% of m_{sh, tot}.