Mass of the protostar, corresponding to the mass in the sink cell, for several values of the (a–b) mass of the cloud, (c) resistivity model, (d) mass-to-flux ratio, (e) density profile, and (f) rotation profile and rotational energy. Panel b shows the same results as panel a, but normalized in such a way that scalability can be readily seen. For panels (c)–(f), M_C = 100 M_⊙ and t_ff = 53.73 kyr.