Mass-weighted 2D histograms showing the core properties at reference times HHhr₂. As in Fig. 7, from top to bottom, 3D velocity dispersion as a function of core mass, specific angular momentum as a function of core size, and mass-size relation, with the observed relations as dashed lines, and the mass-size relation for a critical Bonnor–Ebert sphere as a black solid line. Only thermally unstable cores are shown.