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Fig. 13.

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Milky Way GCs age–metallicity relation using homogeneous ages from VandenBerg et al. (2013) and average metallicities (http://www.sc.eso.org/~bdias/catalogues.html) on the metallicity scale by (2016, 2019 edition). Eccentricity comes from the calculations from GravPot16. The bulge, disc, and halo classification is adopted from Dias et al. (2016). FSR 1776 is identified as a red star contour.

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