Molecular hydrogen in absorption at high redshifts
Molecular hydrogen in absorption at high redshifts
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DOI：
10.1007/s10686-022-09843-y
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发表时间：
2022-03
影响因子：
3
通讯作者：
S. Balashev;P. Noterdaeme
中科院分区：
文献类型：
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作者：
S. Balashev;P. Noterdaeme
本底源光谱中分子氢的吸收谱线是研究冷中性介质物理条件的有力工具。在高红移的情况下，谱线可以方便地在光域中移动，从而允许使用地面望远镜来执行高分辨率光谱，这对于正确分析冷气体至关重要。我们描述了最新的观测进展，基于低分辨率光谱测量(如斯隆数字巡天(SDSS))中高效预选技术的发展。具有高蓝光吞吐量的下一代光谱仪，如CUBES，肯定会显著提高后续观测的效率和结果。在这篇文章中，我们讨论了立方体的高度优先的科学案例，建立在最近的高z观测的基础上：探索规则星系冷相的物理条件和从活动星系核流出气体。
Absorption lines from molecular hydrogen () in the spectra of background sources are a powerful probe of the physical conditions in intervening cold neutral medium. At high redshift,,lines are conveniently shifted in the optical domain, allowing the use of ground-based telescopes to perform high-resolution spectroscopy, which is essential for a proper analysis of the cold gas. We describe recent observational progress, based on the development of efficient pre-selection techniques in low-resolution spectroscopic surveys such as the Sloan Digital Sky Survey (SDSS). The next generation of spectrographs with high blue-throughput, such as CUBES, will certainly significantly boost the efficiency and outcome of follow-up observations. In this paper, we discuss high priority science cases for CUBES, building on recentobservations at high-z: probing the physical conditions in the cold phase of regular galaxies and outflowing gas from active galactic nucleus.