论文标题
银河系家谱的新成员：描述我们银河系的蓬图斯合并
A new member of the Milky Way's family tree: Characterizing the Pontus merger of our Galaxy
论文作者
论文摘要
我们研究了$ \ textit {pontus} $结构 - 最近发现的合并，在银河系的光环的层次结构堆积过程中引入了$ \ sim7 $ globular簇。在这里，我们分析了$ \ textit {pontus} $的恒星种群，并使用esa/$ \ textit {gaia} $ dataset检查（1）其相位分布，（2）其金属性和化学丰度（即[即[fe/h]，[fe/h]，[$α$/fe]，[mg/fe]，[mg fe] DR17和（3）显示有趣特征的颜色刻度图，包括可能的双层分支和少量的蓝色散落者。总而言之，$ \ textit {pontus} $ stars显示了一些独特的属性，这表明它们可能起源于独立卫星银河系的合并；未来的分析将更多地阐明这种结构的真实本质。 $ \ textit {pontus} $ stars的这种化学动态分析是我们更大的努力来表征$ \ textit {ash as all} $的又一步。
We study the $\textit{Pontus}$ structure -- a recently discovered merger that brought in $\sim7$ globular clusters in the course of the hierarchical build-up of the Milky Way's halo. Here, we analyse the stellar population of $\textit{Pontus}$ and examine (1) its phase-space distribution using the ESA/$\textit{Gaia}$ dataset, (2) its metallicity and chemical abundances (i.e., [Fe/H], [$α$/Fe], [Mg/Fe], [Al/Fe]) using the spectroscopic catalogue of APOGEE DR17, and (3) the colour-magnitude diagram that shows interesting features, including a possibly double horizontal branch and a small population of blue stragglers. In sum, the $\textit{Pontus}$ stars show some unique properties that suggest they likely originated from the merging of an independent satellite galaxy; future analysis will shed more light on the true nature of this structure. This chemo-dynamical analysis of $\textit{Pontus}$ stars is another step forward in our bigger quest to characterize $\textit{all}$ the merging events of our Milky Way.
