Increasingly powerful and multiplexed spectroscopic facilities promise detailed chemical abundance patterns for millions of resolved stars in galaxies beyond the Milky Way (MW). Here, we employ the Cramér–Rao lower bound (CRLB) to forecast the precision to which stellar abundances for metal-poor, low-mass stars outside the MW can be measured for 41 current (e.g., Keck, MMT, the Very Large Telescope, and the Dark Energy Spectroscopic Instrument) and planned (e.g., the Maunakea Spectroscopic Explorer, the James Webb Space Telescope (JWST), and Extremely Large Telescopes (ELTs)) spectrograph configurations. We show that moderate-resolution ( R ≲ 5000) spectroscopy at blue-optical wavelengths ( λ ≲ 4500 Å) (i) enables the recovery of two to four times as many elements as red-optical spectroscopy(5000 ≲ λ ≲ 10000 Å) at similar or higher resolutions ( R ∼ 10,000) and (ii) can constrain the abundances of several neutron-capture elements to ≲0.3 dex. We further...

中文翻译：

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预测银河外恒星考古学的化学丰度精度

功能越来越强大且具有多重光谱功能的设施有望为银河系（MW）以外的星系中数百万个已分解恒星提供详细的化学丰度模式。在这里，我们使用Cramér-Rao下界（CRLB）来预测MW以外的金属贫乏低质量恒星的恒星丰度可以在41个电流下测量的精度（例如，Keck，MMT，超大型望远镜，暗能量光谱仪）和已规划的（例如Maunakea光谱浏览器，詹姆斯·韦伯太空望远镜（JWST）和超大型望远镜（ELT））的光谱仪配置。我们证明了在蓝光波长（λ≲4500Å）上的中分辨率（R≲5000）光谱（i）能够使元素恢复为红光光谱（5000≲λ≲10000Å）的两倍至四倍（R〜10,000）和（ii）可以将几种中子俘获元素的丰度限制在≲0.3dex。我们进一步...