Sculptor stars (black points) in the CMD based absolute G_abs magnitudes and G_BP − G_RP colors. The sample is selected from a region of 1.1-deg elliptical radius. In both panels, PARSEC stellar evolutionary tracks are overlaid with color coding for the corresponding [Fe/H] of the tracks, and the red dashed line describes our selection condition for CHeB candidates (see Sect. 3.3.1). Left: we superposed all points of evolutionary tracks with the following conditions: stars younger than 2 Gyr, with [Fe/H] ranging from −2.5 to −0.8, and with masses between 1.8 and 3.0 M_⊙. Right: we superposed all points of the evolutionary tracks with the following conditions: stars older than 7 Gyr, with [Fe/H] ranging from −2.5 to −0.8, and with masses above 0.1 M_⊙. Similarly, we indicate a limit of 2-Gyr by the right most part of the dashed line, i.e., when G_BP − G_RP > 0.9.