Evolution of the disk mass (solid line) and the peak magnetic field value (dashed line) for the , aligned case, in iMHD. The four red dots marked 1 to 4 indicate the times at which the snapshots in Fig. 16 were taken. We recall that the formation of the first Larson core occurs at t = 24300 years (see Table 2). The number 1 indicates the beginning of the release of magnetic flux from inside the core.