标题： 银河系球状星团中的多重恒星群体：观测证据 显示英文标题

标题： Multiple stellar populations in Galactic globular clusters: observational evidence

摘要： 近年来越来越多的测光和光谱观测表明，许多银河系球状星团中存在不同的次级种群，打破了球状星团只拥有单一简单恒星种群的传统观念。这些多重种群在星团的颜色-亮度图中表现为不同的演化序列分裂，并且在恒星间的丰度上表现出差异。本文将总结观测场景。 显示英文摘要

摘要： An increasing number of both photometric and spectroscopic observations over the last years have shown the existence of distinct sub-populations in many Galactic globular clusters and shattered the paradigm of globulars hosting single, simple stellar populations. These multiple populations manifest themselves in a split of different evolutionary sequences in the cluster color-magnitude diagrams and in star-to-star abundance variations. In this paper we will summarize the observational scenario.