Fig. 3.
Normalized Metallicity Distribution Function of M giants in inner two degrees. Upper panel: distributions at |b| = 1 deg and |b| = 2 deg from Zo17, N18, and Za19. Middle panel: same for the GC field from N18, and lower panel: for the NSC from FK17 and R17. A kernel density estimation with a bin size of 0.1 dex is also overplotted as a solid line.
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