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Chemical Abundances of Giants in Globular Clusters

机译：球状星团中巨人的化学丰度

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摘要

A large fraction of stars form in clusters. According to a widespread paradigma, stellar clusters are prototypes of single stellar populations. According to this concept, they formed on a very short time scale, and all their stars share the same chemical composition. Recently it has been understood that massive stellar clusters (the globular clusters) rather host various stellar populations, characterized by different chemical composition: these stellar populations have also slightly different ages, stars of the second generations being formed from the ejecta of part of those of an earlier one. Furthermore, it is becoming clear that the efficiency of the process is quite low: many more stars formed within this process than currently present in the clusters. This implies that a significant, perhaps even dominant fraction of the ancient population of galaxies formed within the episodes that lead to formation the globular clusters.
机译：大部分恒星形成星团。根据广泛的矛盾，恒星簇是单个恒星种群的原型。根据这个概念，它们是在很短的时间内形成的，它们的所有恒星都具有相同的化学成分。最近，据了解，巨大的恒星团（球状星团）拥有各种以化学成分不同为特征的恒星群体：这些恒星群体的年龄也略有不同，第二代恒星是由部分恒星的喷出形成的。一个较早的。此外，越来越明显的是，该过程的效率非常低：在该过程中形成的恒星比当前团簇中存在的恒星更多。这意味着，在导致形成球状星团的情节内形成了古代星系人口的很大一部分，甚至占主导地位。

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