Fig. 12
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Fraction of stars with excesses of Ca in 8 GCs from the census in Carretta & Bragaglia (2021, red points)) as a function of a linear combination of GC mass (Baumgardt et al. 2019) and metallicity (Harris 2010). Blue points are for NGC 7078 and NGC 6752 from the present work. A linear fit is given by the solid line, with the Pearson’s correlation coefficient and the two-tailed probability listed in the panel.
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