Cold HI ejected into the Magellanic Stream
Astrophysics of Galaxies
2020-06-17 v1
Abstract
We report the direct detection of cold HI gas in a cloud ejected from the Small Magellanic Cloud (SMC) towards the Magellanic Stream. The cloud is part of a fragmented shell of HI gas on the outskirts of the SMC. This is the second direct detection of cold HI associated with the Magellanic Stream using absorption. The cold gas was detected using 21-cm HI absorption-line observations with the Australia Telescope Compact Array (ATCA) towards the extra-galactic source PMN J00297228. We find a spin (excitation) temperature for the gas of K. We suggest that breaking super shells from the Magellanic Clouds may be a source of cold gas to supply the rest of the Magellanic Stream.
Cite
@article{arxiv.2006.01971,
title = {Cold HI ejected into the Magellanic Stream},
author = {J. Dempsey and N. M. McClure-Griffiths and K. Jameson and F. Buckland-Willis},
journal= {arXiv preprint arXiv:2006.01971},
year = {2020}
}
Comments
9 pages, 5 figures, accepted for publication in MNRAS