AI 中文总结
该研究通过GASTRONOMI项目的化学动力学分析，揭示了银河系矮星系恒星的化学丰度特征、星族二分性及球状星团的演化关联，开发了球状星团化学分类法以重建银河系吸积历史。
AI 中文摘要
我们概述了正在进行的GASTRONOMI项目，该项目通过化学动力学分析研究银河系（MW）、其卫星矮星系及其中恒星星团的共同演化。我们测定了5个经典矮星系中恒星的精确化学丰度，揭示了质量依赖的化学演化，尤其在α元素如[Si/Fe]上表现明显。研究发现，金属丰度高（[Fe/H]>-1.5）的银河系原位形成恒星与矮星系起源恒星在[Al/Fe]上存在明显二分性。星团是敏感的环境探针，多星族的存在与星系演化相关，而天炉座（Fornax）中富氮恒星可能是已瓦解球状星团（GCs）的遗迹。我们开发了银河系球状星团的化学分类方法，通过低[Al/Fe]分离出原始星族，这将原位形成和吸积形成的球状星团置于[Al/Fe]-[Fe/H]平面的不同区域，为重建银河系吸积历史提供了新工具。
英文摘要
We present an overview of our ongoing GASTRONOMI project, which investigates the coevolution of the Milky Way (MW), its satellite dwarf galaxies, and their star clusters through chemo-dynamical analysis. We derive precise chemical abundances for stars in five classical dwarf galaxies, which reveal mass-dependent chemical evolution, particularly in alpha elements, such as [Si/Fe]. A distinct dichotomy in [Al/Fe] is found between metal-rich ([Fe/H]>-1.5) stars formed in-situ in the MW and those originating in dwarf galaxies. Star clusters act as sensitive environmental probes. The presence of multiple populations correlates with galactic evolution, and nitrogen-rich stars in Fornax are likely relics of disrupted globular clusters (GCs). We developed a chemical classification for Galactic GCs, isolating primordial populations by their low [Al/Fe]. This places in-situ and accreted GCs in distinct regions of the [Al/Fe]-[Fe/H] plane, providing a new tool to reconstruct the Galaxy's accretion history.
CommentsProceedings of the IAU Symposium No. 403, The Hidden Beauty of Galactic Outskirts
