Probing galaxy evolution through Hi 21-cm emission and absorption: current status and prospects with square kilometre array

被引：0
作者：
Rajeshwari Dutta
Sushma Kurapati
J. N. H. S. Aditya
Omkar Bait
Mousumi Das
Prasun Dutta
K. Indulekha
Meera Nandakumar
Narendra Nath Patra
Nirupam Roy
Sambit Roychowdhury
机构：
[1] Università degli Studi di Milano Bicocca,Dipartimento di Fisica G. Occhialini
[2] INAF—Osservatorio Astronomico di Brera,Department of Astronomy
[3] University of Cape Town,Sydney Institute for Astronomy, School of Physics A28
[4] The University of Sydney,Department of Physics
[5] ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D),School of Pure and Applied Physics
[6] Observatoire de Genève,Department of Astronomy
[7] Université de Genève,Department of Physics
[8] Indian Institute of Astrophysics,International Centre for Radio Astronomy Research (ICRAR)
[9] IIT (BHU) Varanasi,undefined
[10] Mahatma Gandhi University,undefined
[11] Astrophysics and Space Engineering,undefined
[12] Indian Institute of Technology Indore,undefined
[13] Indian Institute of Science,undefined
[14] University of Western Australia,undefined
来源：
Journal of Astrophysics and Astronomy | / 43卷
关键词：
Galaxies: evolution; galaxies: ISM; radio lines: galaxies;
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摘要：
One of the major science goals of square kilometre array (SKA) is to understand the role played by atomic hydrogen (Hi) gas in the evolution of galaxies throughout cosmic time. The hyperfine transition line of the hydrogen atom at 21-cm is one of the best tools to detect and study the properties of Hi gas associated with galaxies. In this paper, we review our current understanding of Hi gas and its relationship with galaxies through observations of the 21-cm line both in emission and absorption. In addition, we provide an overview of the Hi science that will be possible with SKA and its precursors and pathfinders, i.e., Hi 21-cm emission and absorption studies of galaxies from nearby to high redshifts that will trace various processes governing galaxy evolution.
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