Blind Search for 21-cm Absorption Systems in New Generation Chinese Radio Telescopes

Status Report From: e-Print archive
Posted: Monday, April 17, 2017

Hao-Ran Yu, Ue-Li Pen, Tong-Jie Zhang, Di Li, Xuelei Chen
(Submitted on 14 Apr 2017)

Neutral hydrogen clouds are known to exist in the Universe, however their spatial distributions and physical properties are poorly understood. Such missing information can be studied by the new generation Chinese radio telescopes through a blind searching of 21-cm absorption systems. We forecast the capabilities of surveys of 21-cm absorption systems by two representative radio telescopes in China -- Five-hundred-meter Aperture Spherical radio Telescope (FAST) and Tianlai 21-cm cosmology experiment (Tianlai). Facilitated by either the high sensitivity (FAST) or the wide field of view (Tianlai) of these telescopes, more than a thousand 21-cm absorption systems can be discovered in a few years, representing orders of magnitude improvement over the cumulative discoveries in the past half a century.
Comments:    4 pages. Accepted for publication in Research in Astronomy and Astrophysics
Subjects:    Astrophysics of Galaxies (astro-ph.GA); Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Cite as:    arXiv:1704.04338 [astro-ph.GA] (or arXiv:1704.04338v1 [astro-ph.GA] for this version)
Submission history
From: Hao-Ran Yu 
[v1] Fri, 14 Apr 2017 03:30:38 GMT (31kb)

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