Left panel: column density distributions and the right panel the normalized PDFs of the Serpens core (in red) and two snapshots of Run I of the simulations of Dale et al. (2012) that differ by 0.4 Myr in time (in blue and green). The snapshot at t_SC is shown in Fig. 3. The dash-dotted red lines in the left panel show the fit of a Gaussian distribution and a power law. In the right panel the dash-dotted lines show the best Gaussian fit of the observations (in red), Run I at t_SC (in blue), and Run I at t_SC+0.4 Myr (in green).