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A Large C+N+O Abundance Spread in Giant Stars of the Globular Cluster NGC 1851

Yong, David; Grundahl, Frank; D'Antona, Francesca; Karakas, Amanda; Lattanzio, John; Norris, John


Abundances of C, N, and O are determined in four bright red giants that span the known abundance range for light (Na and Al) and s-process (Zr and La) elements in the globular cluster NGC 1851. The abundance sum C+N+O exhibits a range of 0.6 dex, a factor of 4, in contrast to other clusters in which no significant C+N+O spread is found. Such an abundance range offers support for the Cassisi et al. scenario in which the double subgiant branch populations are coeval but with different mixtures of...[Show more]

CollectionsANU Research Publications
Date published: 2009
Type: Journal article
Source: Astrophysical Journal, The
DOI: 10.1088/0004-637X/695/1/L62


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