Fig. 5.
Gaia EDR3 optical CMDs (G vs. BP-RP) for the GC region (left panel), a background region (middle panel), and the statistically decontaminated region following Camargo et al. (2009; right panel). The last CMD clearly shows that only the RGB (more metal rich) survives the decontamination procedure. The Gaia decontaminated CMD is fitted by a PARSEC isochrone with age 10 Gyr and metallicity [Fe/H] = − 0.2 dex.
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