Linking photometry and spectroscopy: profiling multiple populations in globular clusters

Open Access

Fig. 9

Left panel: 1P stars [Fe/H] spread from spectroscopy $(W_{[F e / H]}^{I P})$ $\[\left(W_{[\mathrm{Fe} / \mathrm{H}]}^{\mathrm{IP}}\right)\]$ vs. the predicted iron variations by Legnardi et al. (2022) (δ[Fe/H]_1P). Central and right panel: $W_{[F e / H]}^{I P}$ $\[W_{[\mathrm{Fe} / \mathrm{H}]}^{\mathrm{IP}}\]$ vs. the logarithm of cluster mass and clusters’ overall [Fe/H], respectively. Brown circles highlight M3-like GCs. In each panel, we report the Spearman’s correlation coefficient for all the clusters and for M3-like only.

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