Molecular Gas in the Outflow of the Small Magellanic Cloud

Enrico M. Di Teodoro, N. M. McClure-Griffiths, C. De Breuck, L. Armillotta, N. M. Pingel, K. E. Jameson, John M. Dickey, M. Rubio, S. Stanimirović, L. Staveley-Smith

Research output: Contribution to journalArticle

Abstract

We report the first evidence of molecular gas in two atomic hydrogen (H i) clouds associated with gas outflowing from the Small Magellanic Cloud (SMC). We used the Atacama Pathfinder Experiment to detect and spatially resolve individual clumps of 12CO(2 → 1) emission in both clouds. CO clumps are compact (∼10 pc) and dynamically cold (line widths). Most CO emission appears to be offset from the peaks of the H i emission, some molecular gas lies in regions without a clear H i counterpart. We estimate a total molecular gas mass of in each cloud and molecular gas fractions up to 30% of the total cold gas mass (molecular + neutral). Under the assumption that this gas is escaping the galaxy, we calculated a cold gas outflow rate of and mass loading factors of at a distance larger than 1 kpc. These results show that relatively weak starburst-driven winds in dwarf galaxies like the SMC are able to accelerate significant amounts of cold and dense matter and inject it into the surrounding environment.

Original languageEnglish
Article numberL32
JournalAstrophysical Journal Letters
Volume885
Issue number2
DOIs
Publication statusPublished - 10 Nov 2019

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Magellanic clouds
molecular gases
outflow
cold gas
clumps
gas
gases
dwarf galaxies
galaxies
hydrogen
estimates
cold

Cite this

Di Teodoro, E. M., McClure-Griffiths, N. M., Breuck, C. D., Armillotta, L., Pingel, N. M., Jameson, K. E., ... Staveley-Smith, L. (2019). Molecular Gas in the Outflow of the Small Magellanic Cloud. Astrophysical Journal Letters, 885(2), [L32]. https://doi.org/10.3847/2041-8213/ab4fe9
Di Teodoro, Enrico M. ; McClure-Griffiths, N. M. ; Breuck, C. De ; Armillotta, L. ; Pingel, N. M. ; Jameson, K. E. ; Dickey, John M. ; Rubio, M. ; Stanimirović, S. ; Staveley-Smith, L. / Molecular Gas in the Outflow of the Small Magellanic Cloud. In: Astrophysical Journal Letters. 2019 ; Vol. 885, No. 2.
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Di Teodoro, EM, McClure-Griffiths, NM, Breuck, CD, Armillotta, L, Pingel, NM, Jameson, KE, Dickey, JM, Rubio, M, Stanimirović, S & Staveley-Smith, L 2019, 'Molecular Gas in the Outflow of the Small Magellanic Cloud' Astrophysical Journal Letters, vol. 885, no. 2, L32. https://doi.org/10.3847/2041-8213/ab4fe9

Molecular Gas in the Outflow of the Small Magellanic Cloud. / Di Teodoro, Enrico M.; McClure-Griffiths, N. M.; Breuck, C. De; Armillotta, L.; Pingel, N. M.; Jameson, K. E.; Dickey, John M.; Rubio, M.; Stanimirović, S.; Staveley-Smith, L.

In: Astrophysical Journal Letters, Vol. 885, No. 2, L32, 10.11.2019.

Research output: Contribution to journalArticle

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AU - Di Teodoro, Enrico M.

AU - McClure-Griffiths, N. M.

AU - Breuck, C. De

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AU - Pingel, N. M.

AU - Jameson, K. E.

AU - Dickey, John M.

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AU - Stanimirović, S.

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Di Teodoro EM, McClure-Griffiths NM, Breuck CD, Armillotta L, Pingel NM, Jameson KE et al. Molecular Gas in the Outflow of the Small Magellanic Cloud. Astrophysical Journal Letters. 2019 Nov 10;885(2). L32. https://doi.org/10.3847/2041-8213/ab4fe9