论文标题
21cm强度映射的宇宙学的当前状态和未来
Current status and future of cosmology with 21cm Intensity Mapping
论文作者
论文摘要
大约15年前，已经提出了21cm强度映射（IM）作为进行宇宙学调查并绘制宇宙中物质的3D分布的一种经济有效方法，从Z = 0到Z = 6。从那时起，已经建立了许多探路仪器，例如Chime或Tianlai。未来几年将委托其他几个（Hirax，Chord，bingo），而在下一代实验中，将考虑更大的阵列，其中几千个天线被考虑。我们将简要回顾21厘米的宇宙学宇宙学时代（EOR），然后我们将重点放在IM上，以进行较晚的宇宙学。在提出了这种技术限制宇宙学模型，黑暗能源和通货膨胀的一些承诺之后，我们将回顾IM调查的一些工具和科学挑战。本文的第二部分概述了正在进行的和未来的实验以及GBT，Chime和Tianlai的最新结果。
21cm Intensity Mapping (IM) has been proposed about 15 years ago as a cost effective method to carry out cosmological surveys and to map the 3D distribution of matter in the universe, over a large range of post EoR redshifts, from z=0 to z=6. Since then a number of pathfinder instruments have been built, such as CHIME or Tianlai. Several other ones will be commissioned in the next few years (HIRAX, CHORD, BINGO), while even larger arrays, with several thousand antennae are being considered for the next generation experiments. We will briefly review the 21cm cosmology of the Epoch of Reionisation (EoR), and we will then focus on IM for late time cosmology. After presenting some of the promises of this technique to constrain the cosmological model, dark energy and inflation, we will review some of the instrumental and scientific challenges of IM surveys. The second part of the paper presents an overview of the ongoing and future experiments, as well as recent results by GBT, CHIME and Tianlai.
