利用SDSS-V绘制遥远且贫金属的银河系
星系天体物理
2026-04-07 v1 太阳与恒星天体物理
摘要
第五代斯隆数字巡天正在开展首次全天空低分辨率光谱巡天，以研究银河系恒星晕。我们描述了SDSS-V晕巡天的恒星参数处理流程，该流程同时建模光谱、宽波段测光和视差，以推导恒星参数、金属丰度、α元素丰度和距离。由此产生的BOSS-MINESweeper星表通过星团以及与高分辨率光谱巡天的比较，在广泛的恒星参数和金属丰度范围内得到验证。我们展示了该数据集的多项科学能力：识别银河系中化学性质最特殊的恒星、发现并绘制遥远的晕状子结构，以及在最大尺度上测量银河系的全天动力学。SDSS DR19的BOSS-MINESweeper星表已公开，并将在未来的数据发布中更新。
引用
@article{arxiv.2508.00978,
title = {Mapping the Distant and Metal-Poor Milky Way with SDSS-V},
author = {Vedant Chandra and Phillip A. Cargile and Alexander P. Ji and Charlie Conroy and Hans-Walter Rix and Emily Cunningham and Bruno Dias and Chervin Laporte and William Cerny and Guilherme Limberg and Avrajit Bandyopadhyay and Ana Bonaca and Andrew R. Casey and John Donor and Jose G. Fernandez-Trincado and Peter M. Frinchaboy and Pramod Gupta and Keith Hawkins and Jennifer A. Johnson and Juna A. Kollmeier and Madeline Lucey and Ilija Medan and Szabolcs Meszaros and Sean Morrison and Jose Sanchez-Gallego and Andrew K. Saydjari and Conor Sayres and Kevin C. Schlaufman and Keivan G. Stassun and Jamie Tayar and Zachary Way},
journal= {arXiv preprint arXiv:2508.00978},
year = {2026}
}
备注
31 pages, 19 figures; Submitted to AAS Journals;