论文标题
通过线强度映射在小尺度上发布宇宙学信息
Unveiling cosmological information on small scales with line intensity mapping
论文作者
论文摘要
现代宇宙学中最艰巨的挑战之一是探测小尺度$ k \ sim 0.5 \，$ mpc $^{ - 1} $在物质功率谱和群集中。我们表明，通过即将进行的线强度映射调查可以访问如此小的尺度，其中一氧化碳（CO）从高红移处的恒星形成星系发射为例。尽管无法单独检测到这些星系，并且在这些尺度上无法访问强度波动图的两点相关性，但高度非高斯强度图的体素强度分布（VID）对来自微弱源的集成发射敏感。正如我们所描述的，主要局限性是由于与Halo质量函数和CO发射模型相关的不确定性所致。我们表明，通过VID，高红移下一代实验可以探测$λ$ CDM的订单统一性偏差，而第三阶段实验将能够探测到小至$ \ lyssim10 \％10 \％$的偏差，至少至少高达$ k \ sim \ sim \ sim 10 \，$ mpc $^{ - 1} { - 1} $。
One of the toughest challenges in modern cosmology is to probe the small scales $k \sim 0.5\,$Mpc$^{-1}$ in the matter power spectrum and clustering. We show that such small scales will be accessible via upcoming line-intensity mapping surveys, with carbon monoxide (CO) emission from star-forming galaxies at high redshifts as an example. While these galaxies cannot be individually detected and the two-point correlations of the intensity fluctuation maps is not accessible at these scales, the voxel intensity distribution (VID) of the highly non-Gaussian intensity maps is sensitive to the integrated emission from faint sources. As we describe, the main limitations are due to uncertainties related with the halo mass function and the CO emission model. We show that via the VID, high-redshift next-generation experiments can probe deviations from $Λ$CDM of order unity, while stage-3 experiments will be able to probe deviations as small as $\lesssim10\%$ at least up to $k\sim 10\,$Mpc$^{-1}$.
