Hertzsprung–Russel diagrams for 12 654 stars from the HR 1614 moving group (left) and 36 656 stars from Hercules (right) selected from the black and red ellipses shown in Fig. 1. An isochrone with [M/H] = + 0.2 and 2 Gyr is shown as a black solid line, and one with [M/H] = 0 and 8 Gyr is shown as a dashed line. Red dots in the top left plot show all the stars from Table 1 in Feltzing & Holmberg (2000). The colour bar shows the number of stars in each bin for both plots.