Upper panel: average detection probabilities for THA association (contours from red, 100%, to white, 0%), detected spectroscopic companions (white stars) and visual binaries (black crosses) in the physical separation versus mass ratio. The solid, dashed and dash-dotted lines encompass areas with detection probabilities ≥90%, 50%,  and 10 %, respectively. Bottom panel: same as upper panel, but for BPC association.