Cold H i ejected into the Magellanic Stream

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

doi:10.1093/mnras/staa1602

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 journal › Article › peer-review

5 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 language	English
Pages (from-to)	913-920
Number of pages	8
Journal	Monthly Notices of the Royal Astronomical Society
Volume	496
Issue number	1
DOIs	https://doi.org/10.1093/mnras/staa1602
Publication status	Published - 11 Jun 2020

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title = "Cold H i ejected into the Magellanic Stream",

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.",

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author = "J. Dempsey and McClure-Griffiths, {N. M.} and K. Jameson and F. Buckland-Willis",

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doi = "10.1093/mnras/staa1602",

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T1 - Cold H i ejected into the Magellanic Stream

AU - Dempsey, J.

AU - McClure-Griffiths, N. M.

AU - Jameson, K.

AU - Buckland-Willis, F.

PY - 2020/6/11

Y1 - 2020/6/11

N2 - 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.

AB - 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.

KW - ISM: clouds

KW - Magellanic Clouds

KW - galaxies: ISM

KW - radio lines: ISM

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U2 - 10.1093/mnras/staa1602

DO - 10.1093/mnras/staa1602

M3 - Article

SN - 0035-8711

VL - 496

SP - 913

EP - 920

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 1

ER -

Cold H i ejected into the Magellanic Stream

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