On mass-loaded accretion during high mass star formation

Analytical formulae of the dependence of the velocity and density on the radius during spherical accretion with both mass and momentum inputs, as well as the rate of mass inflow are presented. Some features of gas inflow near the star are discussed, and details of mass loading are presented and calculated as caused by hydrodynamical ablation and conductivity. It looks like that in one example velocities of inflow are in the range from 10-20 km/s (free fall) to 40-50 km/s and the densities are in the range from 2 · 108
(free fall) to 6 · 106 cm−3 at 1017 cm when mass-loading accretion is taken place during formation of 10M⊙ mass star.