标题： ACACIAS I：NGC 6822矮星系中192颗恒星的元素丰度标签 显示英文标题

标题： ACACIAS I: Element abundance labels for 192 stars in the dwarf galaxy NGC 6822

摘要： The element abundances of local group galaxies connect enrichment mechanisms to galactic properties and serve to contextualise the Milky Way's abundance distributions. Individual stellar spectra in nearby galaxies can be extracted from Integral Field Unit (IFU) data, and provide a means to take an abundance census of the local group. We introduce a program that leverages $R=1800$, $\mathrm{SNR}=15$, IFU resolved spectra from the Multi Unit Spectroscopic Explorer (MUSE). We deploy the data-driven modelling approach for labelling stellar spectra with stellar parameters and abundances, of The Cannon, on resolved stars in NGC 6822. We construct our model for The Cannon using $\approx$19,000 Milky Way LAMOST spectra with APOGEE labels. We report six inferred abundance labels (denoted $\ell_\mathrm{X}$), for 192 NGC 6822 disk stars, precise to $\approx$$0.15$ dex. We validate our generated spectral models provide a good fit the data, including at individual atomic line features. 我们推断了$\ell_\mathrm{[Fe/H]} = -0.90 \pm 0.03$,$\ell_\mathrm{[Mg/Fe]} = -0.01 \pm 0.01$,$\ell_\mathrm{[Mn/Fe]} = -0.22 \pm 0.02$,$\ell_\mathrm{[Al/Fe]} = -0.33 \pm 0.03$,$\ell_\mathrm{[C/Fe]} =-0.43 \pm 0.03$和$\ell_\mathrm{[N/Fe]} =0.18 \pm 0.03$的平均丰度。这些丰度标签与 APOGEE 观测到的矮星系相似，并且 NGC 6822 相对于银河系的较低增强程度与预期一致。 这种方法支持了一个新时代的到来，即通过低分辨率、低信噪比（SNR）的空间光谱仪（IFU）解析光谱来表征本星系群的富集多样性。 显示英文摘要

摘要： The element abundances of local group galaxies connect enrichment mechanisms to galactic properties and serve to contextualise the Milky Way's abundance distributions. Individual stellar spectra in nearby galaxies can be extracted from Integral Field Unit (IFU) data, and provide a means to take an abundance census of the local group. We introduce a program that leverages $R=1800$, $\mathrm{SNR}=15$, IFU resolved spectra from the Multi Unit Spectroscopic Explorer (MUSE). We deploy the data-driven modelling approach for labelling stellar spectra with stellar parameters and abundances, of The Cannon, on resolved stars in NGC 6822. We construct our model for The Cannon using $\approx$19,000 Milky Way LAMOST spectra with APOGEE labels. We report six inferred abundance labels (denoted $\ell_\mathrm{X}$), for 192 NGC 6822 disk stars, precise to $\approx$$0.15$ dex. We validate our generated spectral models provide a good fit the data, including at individual atomic line features. We infer mean abundances of $\ell_\mathrm{[Fe/H]} = -0.90 \pm 0.03$, $\ell_\mathrm{[Mg/Fe]} = -0.01 \pm 0.01$, $\ell_\mathrm{[Mn/Fe]} = -0.22 \pm 0.02$, $\ell_\mathrm{[Al/Fe]} = -0.33 \pm 0.03$, $\ell_\mathrm{[C/Fe]} =-0.43 \pm 0.03$, $\ell_\mathrm{[N/Fe]} =0.18 \pm 0.03$. These abundance labels are similar to dwarf galaxies observed by APOGEE, and the lower enhancements for NGC 6822 compared to the Milky Way are consistent with expectations. This approach supports a new era in extra-galactic archaeology of characterising the local group enrichment diversity using low-resolution, low-SNR IFU resolved spectra.