HI Science with the Square Kilometre Array
Lister Staveley-Smith, Tom Oosterloo

TL;DR
The SKA will revolutionize HI astronomy by enabling detailed imaging of galaxies across cosmic time, significantly advancing our understanding of galaxy formation, evolution, and the intergalactic medium.
Contribution
This paper introduces the scientific potential of the SKA for HI studies and outlines proposed surveys, including an ultra-deep survey reaching z=2, to explore galaxy evolution.
Findings
Enables imaging of high-redshift galaxies in HI for the first time.
Allows detailed studies of galaxy disks and the IGM at <100 pc resolution.
Facilitates precise measurement of cosmological and evolutionary parameters.
Abstract
The Square Kilometre Array (SKA) will be a formidable instrument for the detailed study of neutral hydrogen (HI) in external galaxies and in our own Galaxy and Local Group. The sensitivity of the SKA, its wide receiver bands, and the relative freedom from radio frequency interference at the SKA sites will allow the imaging of substantial number of high-redshift galaxies in HI for the first time. It will also allow imaging of galaxies throughout the Local Volume at resolutions of <100 pc and detailed investigations of galaxy disks and the transition between disks, halos and the intergalactic medium (IGM) in the Milky Way and external galaxies. Together with deep optical and millimetre/sub-mm imaging, this will have a profound effect on our understanding of the formation, growth and subsequent evolution of galaxies in different environments. This paper provides an introductory text to a…
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Taxonomy
TopicsRadio Astronomy Observations and Technology · Galaxies: Formation, Evolution, Phenomena · Scientific Research and Discoveries
