A Large C+N+O Abundance Spread in Giant Stars of the Globular Cluster NGC 1851
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]
|Collections||ANU Research Publications|
|Source:||Astrophysical Journal, The|
|01_Yong_A_Large_C+N+O_Abundance_Spread_2009.pdf||283.2 kB||Adobe PDF|
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