Fig. 2
Upper panels: HR diagrams for the five bulge fields constructed from the stellar parameters obtained as described in the text, and color-coded according to the metallicity [M/H] . Our adopted limit for giants (log g≤3.5 dex) is marked by a horizontal blue solid line in each panel. Lower panels: J vs. (J − Ks) color−magnitude diagrams constructed from VVV VISTA photometry, completed with 2MASS for stars brighter than Ks = 12 mag, where VVV magnitudes start to saturate. The different selected samples are apparent from the distribution of observations (colored points) in the bulge RC and MS regions in each field, color-coded according to the stellar gravity as dwarfs (blue) and giants (red).
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