宇宙边界的光谱路线图：DESI，DESI-II，Stage-5
A Spectroscopic Road Map for Cosmic Frontier: DESI, DESI-II, Stage-5
摘要：
在本白皮书中，我们为DESI之外的光谱实验提供了实验路线图。DESI将是本世纪20年代的一次变革性宇宙学巡天，将绘制4000万个星系和类星体的地图，并捕获z=1.2以下的大部分可用线性模式。EST-II将在更高密度和更高红移的星系中进行试点观测。第五阶段的实验将建立这些高密度和高红移的观测结果，在三维空间中绘制数亿颗恒星和星系，以解决暴胀、暗能量、轻相对论物质和暗物质的问题。这些光谱数据还将补充下一代弱透镜，线强度映射和CMB实验，并使其充分发挥潜力。
英文摘要：
In this white paper, we present an experimental road map for spectroscopic experiments beyond DESI. DESI will be a transformative cosmological survey in the 2020s, mapping 40 million galaxies and quasars and capturing a significant fraction of the available linear modes up to z=1.2. DESI-II will pilot observations of galaxies both at much higher densities and extending to higher redshifts. A Stage-5 experiment would build out those high-density and high-redshift observations, mapping hundreds of millions of stars and galaxies in three dimensions, to address the problems of inflation, dark energy, light relativistic species, and dark matter. These spectroscopic data will also complement the next generation of weak lensing, line intensity mapping and CMB experiments and allow them to reach their full potential.
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