Cold gas outflows from the Small Magellanic Cloud traced with ASKAP

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dc.contributor.authorMcClure-Griffiths, Naomi
dc.contributor.authorDenes, Helga
dc.contributor.authorDickey, John
dc.contributor.authorStanimirovic, Snežana
dc.contributor.authorStaveley-Smith, Lister
dc.contributor.authorJameson, Katherine
dc.contributor.authorDi Teodoro, Enrico Maria
dc.contributor.authorAllison, James R.
dc.contributor.authorCollier, J. D.
dc.contributor.authorChippendale, A. P.
dc.contributor.authorFranzen, T.
dc.contributor.authorGurkan, Gulay
dc.contributor.authorHeald, G.
dc.contributor.authorHotan, A.
dc.date.accessioned2020-07-09T23:39:55Z
dc.date.issued2018-10-29
dc.date.updated2020-07-06T08:24:30Z
dc.description.abstractFeedback from massive stars plays a critical part in the evolution of the Universe by driving powerful outflows from galaxies that enrich the intergalactic medium and regulate star formation'. An important source of outflows may be the most numerous galaxies in the Universe: dwarf galaxies. With small gravitational potential wells, these galaxies easily lose their star-forming material in the presence of intense stellar feedback(1,2). Here, we show that a nearby dwarf galaxy-the Small Magellanic Cloud-has atomic hydrogen outflows extending at least 2 kiloparsecs from the star-forming bar of the galaxy. The outflows are cold (<400 K) and may have formed during a period of active star formation 25-60 Myr ago(3,4). The total mass of atomic gas in the outflow is about 10(7) solar masses (that is, about 3 per cent of the total atomic gas of the galaxy). The inferred mass flux in atomic gas alone, M-H1 approximate to 0.2-1.0 solar masses per year, is up to one order of magnitude greater than the star-formation rate. We suggest that most of the observed outflow will be stripped from the Small Magellanic Cloud through its interaction with its companion, the Large Magellanic Cloud, and the Milky Way, feeding the Magellanic Stream of hydrogen encircling the Milky Way.en_AU
dc.description.sponsorshipThe MCELS project has been supported in part by NSF grants AST-9540747 and AST-0307613, and through the generous support of the Dean B. McLaughlin Fund at the University of Michigan—a bequest from the family of D. B. McLaughlin in memory of his lasting impact on astronomy. Parts of this research were conducted by the Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions, through project number CE170100013. N.M.M.-G. acknowledges funding from the Australian Research Council via grant FT150100024. We gratefully acknowledge contributions by W. Raja and K. Bannister to ASKAP commissioningen_AU
dc.format.mimetypeapplication/pdfen_AU
dc.identifier.issn2397-3366en_AU
dc.identifier.urihttp://hdl.handle.net/1885/205983
dc.language.isoen_AUen_AU
dc.provenancehttp://v2.sherpa.ac.uk/id/publication/35033..."Author accepted manuscript can be made open access on institutional repository after 6 month embargo" from SHERPA/RoMEO site (as at 3/8/20).
dc.publisherNature Publishing Groupen_AU
dc.relationhttp://purl.org/au-research/grants/arc/CE170100013en_AU
dc.relationhttp://purl.org/au-research/grants/arc/FT150100024en_AU
dc.rights© 2018 The Author(s)en_AU
dc.sourceNature Astronomyen_AU
dc.titleCold gas outflows from the Small Magellanic Cloud traced with ASKAPen_AU
dc.typeJournal articleen_AU
dcterms.accessRightsOpen Access
dcterms.dateAccepted2018-09-21
local.bibliographicCitation.issue11en_AU
local.bibliographicCitation.lastpage906en_AU
local.bibliographicCitation.startpage901en_AU
local.contributor.affiliationMcClure-Griffiths, Naomi, College of Science, ANUen_AU
local.contributor.affiliationDenes, Helga, College of Science, ANUen_AU
local.contributor.affiliationDickey, John, University of Tasmaniaen_AU
local.contributor.affiliationStanimirovic, Snežana, University of Wisconsinen_AU
local.contributor.affiliationStaveley-Smith, Lister, University of Western Australiaen_AU
local.contributor.affiliationJameson, Katherine, College of Science, ANUen_AU
local.contributor.affiliationDi Teodoro, Enrico, College of Science, ANUen_AU
local.contributor.affiliationAllison, James R, University of Oxforden_AU
local.contributor.affiliationCollier, J.D., University of Western Sydneyen_AU
local.contributor.affiliationChippendale, A.P., CSIRO Astronomy and Space Science (CASS)en_AU
local.contributor.affiliationFranzen, T, CSIRO Astronomy and Space Scienceen_AU
local.contributor.affiliationGurkan, Gulay, CSIRO Astronomy and Space Scienceen_AU
local.contributor.affiliationHeald, G, CSIRO Astronomy and Space Scienceen_AU
local.contributor.affiliationHotan, A, CSIRO Astronomy and Space Scienceen_AU
local.contributor.authoruidMcClure-Griffiths, Naomi, u1000518en_AU
local.contributor.authoruidDenes, Helga, u1005255en_AU
local.contributor.authoruidJameson, Katherine, u1033291en_AU
local.contributor.authoruidDi Teodoro, Enrico, u1023542en_AU
local.description.notesImported from ARIESen_AU
local.identifier.absfor020103 - Cosmology and Extragalactic Astronomyen_AU
local.identifier.absfor020104 - Galactic Astronomyen_AU
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciencesen_AU
local.identifier.ariespublicationu4485658xPUB1483en_AU
local.identifier.citationvolume2en_AU
local.identifier.doi10.1038/s41550-018-0608-8en_AU
local.identifier.scopusID2-s2.0-85056107926
local.identifier.thomsonID000448876900020
local.publisher.urlhttps://www.nature.com/en_AU
local.type.statusPublished Versionen_AU

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