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arXiv 2201.01310astro-ph.GA
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原始调查-- XVI。用盖亚EDR3中的STREAMFINDER探测到的Milky Way周围26个恒星流的金属丰度

The Pristine survey -- XVI. The metallicity of 26 stellar streams around the Milky Way detected with the STREAMFINDER in Gaia EDR3

Nicolas F. Martin, Rodrigo A. Ibata, Else Starkenburg, Zhen Yuan, Khyati Malhan, Michele Bellazzini, Akshara Viswanathan, David Aguado, Anke Arentsen, Piercarlo… 展开作者

Nicolas F. Martin, Rodrigo A. Ibata, Else Starkenburg, Zhen Yuan, Khyati Malhan, Michele Bellazzini, Akshara Viswanathan, David Aguado, Anke Arentsen, Piercarlo Bonifacio, Ray Carlberg, Jonay I. González Hernández, Vanessa Hill, Pascale Jablonka, Georges Kordopatis, Carmela Lardo, Alan W. McConnachie, Julio Navarro, Rubén Sánchez-Janssen, Federico Sestito, Guillaume F. Thomas, Kim A. Venn, Sara Vitali, Karina T. Voggel

备注：
25 pages, 29 figures, accepted for publication in MNRAS. Updated version has only minor changes compared to initial submission. The metallicity of most streams have marginally changed in the updated version
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摘要：

我们使用全景原始调查提供的光度金属丰度研究的准确性，并推导出金属丰度的众多恒星流发现的应用程序的STREAMFINDER算法的盖亚EDR 3数据。Pristine中存在的所有26个流都显示出清晰的金属丰度分布函数，这提供了对这些结构的真实性的独立检查，支持STREAMFINDER在寻找流方面的可靠性以及Pristine测量精确金属丰度的能力。我们进一步提出了6个候选结构的相干相空间和金属丰度信号，是非常可能的流。大多数研究的物流金属含量非常低（14种结构[Fe/H]<-2.0），并包括3种[Fe/H]<-2.9的系统（C-11、C-19和C-20）。这些流可能是最近的低光度矮星系的碎片，也可能来自金属量明显低于任何已知的当前银河系球状星团的球状星团。我们的研究表明，质量测光金属丰度可以大大加强盖亚数据对银河系考古学研究的承诺，使我们能够追溯到银河系形成的最早时期及其恒星晕成分。

英文摘要：

We use the photometric metallicities provided by the panoramic Pristine survey to study the veracity and derive the metallicities of the numerous stellar streams found by the application of the STREAMFINDER algorithm to the Gaia EDR3 data. All 26 streams present in Pristine show a clear metallicity distribution function, which provides an independent check of the reality of these structures, supporting the reliability of STREAMFINDER in finding streams and the power of Pristine to measure precise metallicities. We further present 6 candidate structures with coherent phase-space and metallicity signals that are very likely streams. The majority of studied streams are very metal-poor (14 structures with [Fe/H]<-2.0) and include 3 systems with [Fe/H]<-2.9 (C-11, C-19, and C-20). These streams could be the closest debris of low-luminosity dwarf galaxies or may have originated from globular clusters of significantly lower metallicity than any known current Milky Way globular cluster. Our study shows that the promise of the Gaia data for Galactic Archeology studies can be substantially strengthened by quality photometric metallicities, allowing us to peer back into the earliest epochs of the formation of our Galaxy and its stellar halo constituents.

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