Light-element abundance variations in globular clusters

被引：12
|
作者：
Martell, S. L. [1 ]
机构：
[1] Univ Heidelberg, Zentrum Astron, D-69120 Heidelberg, Germany
来源：
ASTRONOMISCHE NACHRICHTEN | 2011年 / 332卷 / 05期
关键词：
globular clusters: general; nuclear reactions; nucleosynthesis; abundances; stars: abundances; DWARF SPHEROIDAL GALAXY; MULTIPLE STELLAR POPULATIONS; ASYMPTOTIC GIANT BRANCH; DOUBLE SUBGIANT BRANCH; OMEGA-CENTAURI; MAIN-SEQUENCE; MILKY-WAY; CHEMICAL EVOLUTION; STAR-CLUSTERS; RED GIANTS;
D O I：
10.1002/asna.201011561
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Star-to-star variations in abundances of the light elements carbon, nitrogen, oxygen, and sodium have been observed in stars of all evolutionary phases in all Galactic globular clusters that have been thoroughly studied. The data available for studying this phenomenon, and the hypotheses as to its origin, have both co-evolved with observing technology; once high-resolution spectra were available even for main-sequence stars in globular clusters, scenarios involving multiple closely spaced stellar generations enriched by feedback from moderate-and high-mass stars began to gain traction in the literature. This paper briefly reviews the observational history of globular cluster abundance inhomogeneities, discusses the presently favored models of their origin, and considers several aspects of this problem that require further study. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
引用
收藏
页码：467 / 474
页数：8
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