Y. Xu, and X. Zhang. (2020)cite arxiv:2002.00572Comment: 6 pages, 3 figures.
In order to precisely measure the cosmological parameters and answer the
fundamental questions in cosmology, it is necessary to develop new, powerful
cosmological probes, in addition to the proposed next-generation optical survey
projects. The neutral hydrogen 21 cm sky surveys will definitely provide a
promising tool to study the late-universe evolution, helping in elucidating the
nature of dark energy. The Square Kilometre Array, the largest radio telescope
in the world, which is scheduled to be constructed in the near future, will
undoubtedly push the 21 cm cosmology into a new era, and greatly promote the
development of cosmology in the forthcoming decades.