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The two metallicity groups of the globular cluster M 22: A chemical perspective

Marino, A. F.; Sneden, Chris; Kraft, R. P.; Wallerstein, G; Norris, John; Da Costa, Gary; Milone, A. P.; Ivans, Inese; Gonzalez, G.; Fulbright, J.P.; Hilker, M; Piotto, G; Zoccali, M


We present a detailed chemical composition analysis of 35 red giant stars in the globular cluster M 22. High resolution spectra for this study were obtained at five observatories, and analyzed in a uniform manner. We have determined abundances of representative light proton-capture, α, Fe-peak and neutron-capture element groups. Our aim is to better understand the peculiar chemical enrichment history of this cluster, in which two stellar groups are characterized by a different content in iron,...[Show more]

CollectionsANU Research Publications
Date published: 2011
Type: Journal article
Source: Astronomy and Astrophysics
DOI: 10.1051/0004-6361/201116546
Access Rights: Open Access


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