Prospecting for chemical tags among open clusters

Abstract

Determinations of the chemical composition of red giants in a large sample of open clusters show that the abundances of the heavy elements La, Ce, Nd and Sm but not so obviously Y and Eu vary from one cluster to another across a sample all having about the solar metallicity. For La, Ce, Nd and Sm the amplitudes of the variations at solar metallicity scale approximately with the main s-process contribution to solar system material. Consideration of published abundances of field stars suggest that such a spread in heavy element abundances is present for the thin and thick disk stars of different metallicity. This new result provides an opportunity to chemically tag stars by their heavy elements and to reconstruct dissolved open clusters from the field star population.

8 pages, 6 figures, 2 tables, Accepted for publication in ApJ

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Cited by in corpus (5)

• Wide Binaries in Tycho-Gaia II: Metallicities, Abundances, and Prospects for Chemical Tagging
• Comprehensive abundance analysis of red giants in the open clusters Stock 2, NGC 2168, 6475, 6991 and 7762
• A GALAH View of the Chemical Homogeneity and Ages of Stellar Strings Identified in Gaia
• Chemical compositions of giants in the Hyades And Sirius superclusters
• Omega Centauri: weak MgH-band in red giants directly trace the helium content