Zoomed images of run B at times 1.2, 2.4, and 2.8 Myr, showing the central dense objet. Upper panel: column density. Lower panel: velocity field overplotted on density sliced map. The origin of the coordinate corresponds to the center of the computational box and the figures are recentered such that the densest cell in the rightmost panel is at the center of the image. Sink particles are not shown.