用Sloan数字巡天和Johnson-Wynkins宽波段测光对球状星团多星族径向分布的再评估
A Careful Reassessment of Globular Cluster Multiple Population Radial Distributions with Sloan Digital Sky Survey and Johnson-Cousins Broadband Photometry
摘要：
关于球状星团多种群径向分布的性质的推断是一个值得关注的问题，因为它们在测试或验证星团动力学演化模型中起着重要作用。在这项研究中，我们提出了一个重新分析的八个球状星团的径向分布，使用公开的地面Ugriz和UBVRI测光，纠正文献中确定的系统误差。我们详细说明了在从径向分布得出结论时，不仅需要包括和考虑K-S概率，还需要考虑临界K-S统计值，以及样本不完整性的影响。修正后的累积径向分布，并回顾了每个集群的文献，以提供一个更全面的图片，我们的结果。我们发现，许多多个种群并不像曾经认为的那样隔离，并且迫切需要更好地了解球状星团中多个种群的空间分布。
英文摘要：
Inconsistencies regarding the nature of globular cluster multiple population radial distributions is a matter for concern given their role in testing or validating cluster dynamical evolution modeling. In this study, we present a re-analysis of eight globular cluster radial distributions using publicly available ground-based ugriz and UBVRI photometry; correcting for a systematic error identified in the literature. We detail the need for including and considering not only K-S probabilities but critical K-S statistic values as well when drawing conclusions from radial distributions, as well as the impact of sample incompleteness. Revised cumulative radial distributions are presented, and the literature of each cluster reviewed to provide a fuller picture of our results. We find that many multiple populations are not as segregated as once thought, and that there is a pressing need for better understanding of the spatial distributions of multiple populations in globular clusters.
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