Spatial distribution of populations A and B, defined according to the probability criterion described in Sect. 4.2. In the main panel these populations and the set of cluster members that cannot be confidently assigned to either are shown. Symbols are as defined in Fig. 9. The cross marks the position of γ² Vel. In the top and side panels we show the distribution of RV with right ascension and declination respectively. The solid (red) lines and the dashed (blue) lines show best-fitting linear relationships for populations A and B respectively.