Bar graph showing the fraction of active RGs among the RGB and RC groups as a function of mass. For each mass bin, the estimate of the fraction of active stars is extracted from the number of active stars, the number of inactive stars, and the ratio of stars with a known evolutionary status as explained in Sect. 3.3.2 (Eq. (3)). All the numbers used to produce this graph are displayed in Table A.1. For RGBs with M ∈ [0.5, 1.0] R_⊙, the bar is gray because it relies on a very small sample (1 active and 27 inactive RGBs, see Table A.1), and is not statistically secure.