AI 中文总结
研究基于暗能量光谱仪第一次数据发布分析12颗高度富金属白矮星，确定其恒星参数和光球金属丰度，识别多种元素，结论是吸积体组成类似内太阳系成分，确立了DESI识别富金属目标及得出可靠组成的作用。
AI 中文摘要
富含金属的白矮星为了解系外行星内部组成提供了独特视角。这些恒星吸积被破坏行星体的碎片，因此测量恒星参数和光球丰度可得出母体的整体组成。目前已知超1750颗吸积碎片的白矮星，但只有几十颗富金属程度足以进行详细丰度研究。本文报告了对暗能量光谱仪（DESI）第一次数据发布中观测到的12颗高度富金属白矮星的分析。我们确定了它们的恒星参数和光球金属丰度，在其光谱中识别出3到10种不同元素，包括大多数造岩元素。我们得出结论，吸积体的组成大致类似于内太阳系中发现的成分，如原始陨石、加工物质或行星核心。六个系统允许更深入分析：四个母体由干造岩元素组成；两个类似于富含水的星子。因此，本研究确立了DESI作为识别富金属目标的有力调查手段，能得出吸积系外行星物质的可靠组成。
英文摘要
Metal-enriched white dwarfs provide a unique insight into the composition of exoplanet interiors. These stars accrete the debris of disrupted planetary bodies, and hence, measuring the stellar parameters and photospheric abundances yields the bulk compositions of the parent bodies. At present, over 1750 debris-accreting white dwarfs are known, but just a few dozen are sufficiently enriched to allow a detailed abundance study. Here we report the analysis of 12 highly metal-enriched white dwarfs observed within the Data Release~1 of the Dark Energy Spectroscopic Instrument (DESI). We characterised their stellar parameters and photospheric metal abundances and we identified between three and ten different elements in their optical spectra, including most of the rock-forming species: O, Mg, Si, Ca and Fe. We conclude that the accreted bodies broadly resemble compositions found within the inner Solar System such as primitive meteorites, processed material or planetary cores. Six of the systems allowed a more thorough analysis: four of the parent bodies are composed of dry rock-forming elements; and two of them of something akin to a water-rich planetesimal. Thus, this study establishes DESI as a potent survey for identifying metal-rich targets, yielding reliable compositions of accreted exoplanetary material.
Journal refMonthly Notices of the Royal Astronomical Society, Volume 551, Issue 1, id.stag1353, 33 pp., September 2026
