Synergy between future 21-cm experiments and physical cosmology

暗物质的本质和第一批星系的形成都是未解之谜。在最初的5亿年里，我们的宇宙充满了氢原子，被第一批星系照亮。在这个所谓的宇宙黎明，来自这种气体的21厘米辐射编码了看不见的星系和暗物质的特性。该项目旨在建立一个创新的框架，利用未来的21厘米实验，利用平方公里阵列来观测宇宙黎明，并预测暗物质物理的最佳约束。其他成果还包括利用神经网络对第一批星系进行了最大规模的宇宙学模拟，并利用贝叶斯定理和詹姆斯·韦伯太空望远镜提高了对星系性质的认识。

The nature of dark matter and formation of the first galaxies are both unsolved mysteries. During the first 500 million years, our universe was filled with hydrogen atoms illuminated by the first galaxies. The 21-cm radiation from this gas encodes properties of unseen galaxies and dark matter during this so-called cosmic dawn. This project aims to build an innovative framework to leverage future 21-cm experiments using The Square Kilometre Array to observe cosmic dawn, and to forecast the optimal constraints on dark matter physics. Additional outcomes include the largest cosmological simulation of the first galaxies powered by neural networks and improved knowledge of their properties using Bayes' theorem and The James Webb Space Telescope.