Late stages of solar type protostars

A consistent hydrodynamical and radiative transfer calculation in spherical symmetry for a 1 solar mass protostar is presented. The calculation starts with Larson's initial conditions and continues until almost all the material has fallen onto a hydrostatic core with a large outer convection zone. The innermost percent of the mass is partially degenerate. Due to the numerical technique used, the radius of the hydrostatic core is determined with a high degree of accuracy. (Auth.)