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Iron and neutron-capture element abundance variations in the globular cluster M2 (NGC 7089)

Yong, David; Roederer, Ian U.; Grundahl, Frank; Da Costa, Gary; Karakas, Amanda; Norris, John; Aoki, Wako; Fishlock, Cherie; Marino, Anna; Milone, Antonino; Shingles, Luke


We present CN and CH indices and Ca II triplet metallicities for 34 giant stars and chemical abundances for 33 elements in 14 giants in the globular cluster M2. Assuming that the programme stars are cluster members, our analysis reveals (i) an extreme variation in CN and CH line strengths, (ii) a metallicity dispersion with a dominant peak at [Fe/H] ≈ -1.7 and smaller peaks at -1.5 and -1.0, (iii) star-to-star abundance variations and correlations for the light elements O, Na, Al and Si and...[Show more]

CollectionsANU Research Publications
Date published: 2014
Type: Journal article
Source: Monthly Notices of the Royal Astronomical Society
DOI: 10.1093/mnras/stu806


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