We seek to resolve the tension in the literature regarding the presence of radially segregated multiple populations in Galactic globular cluster M13. Previous studies of this nearby cluster have presented discordant results about the degree of dynamical mixing in M13's inner region. Using ground-based (UBVI) photometry, we show that cumulative radial distributions of stars on the blue and red sides of the red giant branch are statistically identical. Interestingly, these results are obtained using data from large-aperture, ground-based telescopes as well as a more modestly-sized instrument, and both are in agreement with previous work done using HST and Stromgren photometry. Results are derived using the C_{U,B,I} index, shown to be sensitive to compositional differences. We discuss our conclusions that the chemically distinct populations within M13 may be dynamically mixed in the context of published results from simulations.

中文翻译：

---

重新审视 M13 多重人口的径向分布

我们试图解决文献中关于银河系球状星团 M13 中存在径向分离的多个种群的紧张局势。先前对这个附近星团的研究对 M13 内部区域的动力混合程度提出了不一致的结果。使用地基（UBVI）测光，我们表明红巨星分支蓝色和红色侧恒星的累积径向分布在统计上是相同的。有趣的是，这些结果是使用来自大口径地面望远镜以及更小型仪器的数据获得的，两者都与之前使用 HST 和 Stromgren 光度法所做的工作一致。结果是使用 C_{U,B,I} 指数得出的，表明对成分差异很敏感。