A new all-sky catalogue of about 600 old open cluster metallicities shows a knee-shaped radial gradient, a steep vertical gradient, and weak radial mixing in the Milky Way disc.
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Metallicities of old open clusters: A new Galactic map
A new all-sky catalogue of about 600 old open cluster metallicities shows a knee-shaped radial gradient, a steep vertical gradient, and weak radial mixing in the Milky Way disc.