Cool Outflows and HI absorbers with SKA
Raffaella Morganti, Elaine M. Sadler, Stephen J. Curran, the SKA HI, SWG Members
TL;DR
This paper discusses how HI 21-cm absorption spectroscopy, especially with SKA, will advance understanding of cold neutral gas in galaxies across cosmic time, highlighting current status, future plans, and limitations.
Contribution
It outlines the potential of SKA1 to revolutionize HI absorption studies and addresses current limitations in the design and capabilities.
Findings
SKA1 will enable unprecedented HI absorption observations across redshifts.
Current limitations in design may affect the scope of future studies.
Plans for SKA pathfinders will enhance the understanding of cold gas in galaxies.
Abstract
HI 21-cm absorption spectroscopy provides a unique probe of the cold neutral gas in normal and active galaxies from redshift z > 6 to the present day. We describe the status of HI absorption studies, the plans for pathfinders/precursors, the expected breakthroughs that will be possible with SKA1, and some limitations set by the current design.
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