Proper motion offsets vs. parallax for candidate young stars within the boundaries of Sco–Cen selected from Figure 2 (top). A Gaussian mixture model has been applied to these data to estimate probabilities of membership in Sco–Cen and the field population. The stars that have >90% probabilities of membership in Sco–Cen are shown (bottom). The three Sco–Cen components in the model are represented by the ellipses (2σ).