Colour–magnitude diagrams for different regions of the GALACTICNUCLEUS survey. The colour code corresponds to stellar densities, using a power stretch scale. First, second, and third columns correspond to the central, the transition East, and the inner bulge South catalogues, respectively. The black arrow indicates the reddening vector and an extinction of 0.5 mag in the Ks band. The labels in the central panel correspond to the different stellar populations present in the CMDs: AGBB (asymptotic giant branch bump), RC (red clump), RGBB (red giant branch bump), post MS (post main sequence stars), and Asc GB (ascending giant branch) and the numbers from 1 to 3 indicate the foreground population corresponding to three spiral arms.
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