Fig. A.1.
Top: metallicity distribution of cluster TIICs. The source catalogue is on the database by Clement et al. (2001). The iron abundances are based on the metallicity scale by Carretta et al. (2009). Bottom: same as the top panel, but for Galactic field TIICs. The iron abundances are based on high- and low-resolution spectra The red histogram displays the metallicity distribution of WVs only (see text for details).
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