Cold H i ejected into the Magellanic Stream

J. Dempsey*, N. M. McClure-Griffiths, K. Jameson, F. Buckland-Willis

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    4 Citations (Scopus)

    Abstract

    We report the direct detection of cold H i gas in a cloud ejected from the Small Magellanic Cloud (SMC) towards the Magellanic Stream. The cloud is part of a fragmented shell of H i gas on the outskirts of the SMC. This is the second direct detection of cold H i associated with the Magellanic Stream using absorption. The cold gas was detected using 21-cm H i absorption-line observations with the Australia Telescope Compact Array (ATCA) towards the extra-galactic source PMN J0029-7228. We find a spin (excitation) temperature for the gas of 68 ± 20 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.

    Original languageEnglish
    Pages (from-to)913-920
    Number of pages8
    JournalMonthly Notices of the Royal Astronomical Society
    Volume496
    Issue number1
    DOIs
    Publication statusPublished - 11 Jun 2020

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