Spatial distribution of the sample in the Sco-Cen association. Sources in Upper and Lower Centaurus (as well as the outlying HD169142 and HD152404) are in the top map while sources in Upper Scorpius are in the bottom map. No source in Ophiuchus or Lupus is shown here (see Fig. 8). All sources from Centaurus as well as peripheral sources from Upper Scorpius host bright disks. The background image is from the Improved Reprocessing of the IRAS Survey (IRIS) at 100 µm (Band 4). The NIR images shown in the inset panels have spatial and flux scales optimized for better representation. Only detections are shown.