Spatial distributions of star subsamples in Sco OB1. The background image is a two-dimensional density histogram of stars in VPHAS+ DR2 (and sources in our NIR catalog in the bottom right panel). Top left panel: M_gri stars (green)selected from Fig. 6a. Top right panel: M_riJ stars (green)from Fig. 6b. Bottom left panel: M_riH stars (green) from Fig. 6c. Bottom right panel: dark-red points, red squares and orange crosses are Hα-emission stars, and stars with optical-NIR and NIR excesses, respectively, as in Fig. 6; larger purple crosses are UV-excess stars from Fig. 7; big blue dots are O or B stars from SIMBAD. Oblique dashed black lines indicate constant galactic latitude b, as labeled. Spatial subregions of interest are indicated in all panels with cyan borders.