期刊
ASTROPHYSICAL JOURNAL LETTERS
卷 695, 期 1, 页码 L62-L66出版社
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/695/1/L62
关键词
Galaxy: abundances; globular clusters: individual (NGC 1851); stars: abundances
资金
- Carlsberg Foundation
- Danish AsteroSeismology Centre at Aarhus University
- Danish National Research Council
- Italian PRINMIUR
- Australian Research Council's Discovery Projects funding scheme [DP0663562, DP0664105]
- Access to Major Research Facilities Programme
- Australian Federal Government
- Australian Research Council [DP0664105] Funding Source: Australian Research Council
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 C+N+O abundances. Further, the Na, Al, Zr, and La abundances are correlated with C+N+O, and therefore NGC 1851 is the first cluster to provide strong support for the scenario in which asymptotic giant branch stars are responsible for the globular cluster light element abundance variations.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据