论文标题
XQR-30金属吸收器目录：778吸收系统跨越2 <z <6.5
The XQR-30 Metal Absorber Catalog: 778 Absorption Systems Spanning 2 < z < 6.5
论文作者
论文摘要
Z> 6类数的光谱中的金属吸收线是在电离时代结束附近的环境和白术气体的电离状态和化学成分的基本探针。需要大型吸收器样品来鲁棒地测量典型的吸收特性，并优化早期宇宙中金属合成，转运和电离的模型。 “ Z〜5.8-6.6上的类星体的最终Xshooter Legacy调查（XQR-30）获得了30种发光类星体的高信噪光谱，几乎是12个高质量Z〜6 Quasar Spectra的现有样品的数字。我们使用这种前所未有的样品来构建一个778个系统的目录，显示了一个或多个MGII（360个系统），FEII（184），CII（46），CIV（479），SIIV（479），SIIV（127）和NV（13）和NV（13）和NV（13）。该目录大大扩展了Z> 5吸收剂的现有样品，特别是对于CIV和SIIV，这是高红移时电离光子背景的重要探针。对于REST框架等效宽度W> 0.03AA（0.09AA），样本为50％（90％）。我们公开发布了吸收器目录以及完整性统计信息和Python脚本，以计算不同离子和红移范围的吸收搜索路径。该数据集是研究从星系组装时代到宇宙中午研究的富含气体的关键遗产资源，并为使用James Webb太空望远镜和30m级望远镜的更高红移研究铺平了道路。
Intervening metal absorption lines in the spectra of z > 6 quasars are fundamental probes of the ionization state and chemical composition of circumgalactic and intergalactic gas near the end of the reionization epoch. Large absorber samples are required to robustly measure typical absorber properties and to refine models of the synthesis, transport, and ionization of metals in the early Universe. The "Ultimate XSHOOTER legacy survey of quasars at z~5.8-6.6" (XQR-30) has obtained high signal-to-noise spectra of 30 luminous quasars, nearly quadrupling the existing sample of 12 high quality z~6 quasar spectra. We use this unprecedented sample to construct a catalog of 778 systems showing absorption in one or more of MgII (360 systems), FeII (184), CII (46), CIV (479), SiIV (127), and NV (13) which span 2 < z < 6.5. This catalog significantly expands on existing samples of z > 5 absorbers, especially for CIV and SiIV which are important probes of the ionizing photon background at high redshift. The sample is 50% (90%) complete for rest-frame equivalent widths W > 0.03AA (0.09AA). We publicly release the absorber catalog along with completeness statistics and a Python script to compute the absorption search path for different ions and redshift ranges. This dataset is a key legacy resource for studies of enriched gas from the era of galaxy assembly to cosmic noon, and paves the way for even higher redshift studies with the James Webb Space Telescope and 30m-class telescopes.
