Metallicities of old open clusters: A new Galactic map

Open Access

Table 1

Summary of the cross-match between the old OC sample and the metallicity catalogues.

Xmatched catalogue	Old OC	Members	MAD
Anders et al. (2022)	1107	98 252	0.11
Andrae et al. (2023b) full	1113	81 384	0.11
Andrae et al. (2023b) giants	597	7994	0.05
Zhang et al. (2023)	941	41 462	0.10
Khalatyan et al. (2024)	1093	73 418	0.06
Fallows & Sanders (2024)	1107	78 996	0.11
Ye et al. (2025)	363	13 511	0.13

Notes. The number of clusters and cluster members retrieved in each catalogue is provided together with the typical value of MAD computed with the median metallicity per cluster.

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