Relation between semi-major axis a (in au) and mass ratio q between components for all companions found so far around stars that are member of the nearby intermediate-age open clusters considered in this paper. Blue filled circles are resolved companions (detected in HCI or directly seen in Gaia); orange open squares are those detected using dynamical methods or eclipses or transits. Detection completeness in background; a linear grey-scale is used with white meaning 100% and black zero (see the insert on bottom right of each panel). The red rectangle marks the area covered by JL planets, here 1.5 < a < 50 au and 0.001 < q < 0.02. Left panel is for Ursa Major; centre panel is for Coma Berenices; right panel is for Hyades. Candidate companions with a probability higher than 50% of being unrelated cluster members were not considered in these plots.