Fig. 7
The relative fractions of different metallicities present on the RGB at different photometric depths, with respect to an MDF going down to MV = −3.2 (V = 19.5) on the RGB. The relative fraction indicates by which factor a population is incorrectly sampled in the CMD. For comparison the level of the HB is VHB = 20.13 (MV = 0.43).
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