Cold HI ejected into the Magellanic Stream
收藏Research Data Australia2024-12-14 收录
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https://researchdata.edu.au/cold-hi-ejected-magellanic-stream/1607193
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We report the direct detection of cold HI gas in a cloud ejected from the Small Magellanic Cloud (SMC) towards the Magellanic Stream. \nThe 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 J0029-7228.\nWe find a spin (excitation) temperature for the gas of 68+-20 K. \nWe suggest that breaking super shells from the Magellanic Clouds may be a source of cold gas to supply the rest of the Magellanic Stream.
提供机构:
Commonwealth Scientific and Industrial Research Organisation



