Far infrared (140 μm) map of the region around the young cluster Cha I from the AKARI all-sky survey (Doi et al. 2015). Yellow dots indicate the positions of all the known members from the literature, while the bigger red dots indicate the positions of all the members selected by the GES observations according to the criteria discussed in Sect. 3. The dashed blue circles (centers RA1 = 167.2°, Dec1 = –76.5°, RA2 = 167.2°, Dec2 = –77.5°, and radius 0.35°) delimit the north and south subclusters (see Sects. 4.2 and 5.3).