TY - JOUR
T1 - Probing galaxy evolution through Hi 21-cm emission and absorption
T2 - current status and prospects with square kilometre array
AU - Dutta, Rajeshwari
AU - Kurapati, Sushma
AU - Aditya, J. N.H.S.
AU - Bait, Omkar
AU - Das, Mousumi
AU - Dutta, Prasun
AU - Indulekha, K.
AU - Nandakumar, Meera
AU - Patra, Narendra Nath
AU - Roy, Nirupam
AU - Roychowdhury, Sambit
N1 - Funding Information:
We thank the anonymous reviewer for useful comments that helped to improve the quality of this review article. RD gratefully acknowledges support from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (grant agreement no. 757535). SK is supported by the South African Research Chairs Initiative of the Department of Science and Technology and National Research Foundation.
Publisher Copyright:
© 2022, Indian Academy of Sciences.
PY - 2022/12/19
Y1 - 2022/12/19
N2 - 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.
AB - 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.
KW - Galaxies: evolution
KW - galaxies: ISM
KW - radio lines: galaxies
UR - http://www.scopus.com/inward/record.url?scp=85144353143&partnerID=8YFLogxK
U2 - 10.1007/s12036-022-09875-y
DO - 10.1007/s12036-022-09875-y
M3 - Review article
AN - SCOPUS:85144353143
SN - 0250-6335
VL - 43
JO - Journal of Astrophysics and Astronomy
JF - Journal of Astrophysics and Astronomy
IS - 2
M1 - 103
ER -