The 6-GHz methanol multibeam maser catalogue - I. Galactic Centre region, longitudes 345? to 6?

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dc.contributor.authorCaswell, J.L.
dc.contributor.authorPhillips, C
dc.contributor.authorFuller, G.A.
dc.contributor.authorGreen, J A
dc.contributor.authorAvison, A
dc.contributor.authorBreen, S.L.
dc.contributor.authorBurton, Michael Graham
dc.contributor.authorChrysostomou, A
dc.contributor.authorCox, J
dc.contributor.authorDiamond, Philip John
dc.contributor.authorMcClure-Griffiths, Naomi
dc.date.accessioned2022-01-12T01:08:14Z
dc.date.available2022-01-12T01:08:14Z
dc.date.issued2010
dc.date.updated2020-12-06T07:18:56Z
dc.description.abstractWe have conducted a Galactic plane survey of methanol masers at 6668 MHz using a sevenbeam receiver on the Parkes telescope. Here we present results from the first part, which provides sensitive unbiased coverage of a large region around the Galactic Centre. Details are given for 183 methanol maser sites in the longitude range 345◦ through the Galactic Centre to 6◦. Within 6◦ of the Galactic Centre, we found 88 maser sites, of which more than half (48) are new discoveries. The masers are confined to a narrow Galactic latitude range, indicative of many sources at the Galactic Centre distance and beyond, and confined to a thin disc population; there is no high-latitude population that might be ascribed to the Galactic bulge. Within 2◦ of the Galactic Centre the maser velocities all lie between −60 and +77 km s−1, a range much smaller than the 540 km s−1 range observed in CO. Elsewhere, the maser with highest positive velocity (+107 km s−1) occurs, surprisingly, near longitude 355◦ and is probably attributable to the Galactic bar. The maser with the most negative velocity (−127 km s−1) is near longitude 346◦, within the longitude–velocity locus of the near side of the ‘3-kpc arm’. It has the most extreme velocity of a clear population of masers associated with the near and far sides of the 3-kpc arm. Closer to the Galactic Centre the maser space density is generally low, except within 0.25 kpc of the Galactic Centre itself, the ‘Galactic Centre zone’, where it is 50 times higher, which is hinted at by the longitude distribution, and confirmed by the unusual velocities.en_AU
dc.description.sponsorshipAA and DW-McS acknowledge support from a Science and Technology Facilities Council (STFC) studentship. LQ acknowledges support from the EU Framework 6 Marie Curie Early Stage Training programme under contract MEST-CT-2005-19669 ‘ESTRELA’.en_AU
dc.format.mimetypeapplication/pdfen_AU
dc.identifier.issn0035-8711en_AU
dc.identifier.urihttp://hdl.handle.net/1885/258353
dc.language.isoen_AUen_AU
dc.provenancehttps://v2.sherpa.ac.uk/id/publication/24618..."The Published Version can be archived in an Institutional Repository" from SHERPA/RoMEO site (as at 12/01/2022). This article has been accepted for publication in [Monthly Notices of the Royal Astronomical Society] ©: 2010 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.en_AU
dc.publisherOxford University Pressen_AU
dc.rights© 2010 The Authors. Journal compilation © 2010 RASen_AU
dc.sourceMonthly Notices of the Royal Astronomical Societyen_AU
dc.subjectISM: moleculesen_AU
dc.subjectMasersen_AU
dc.subjectStars: formationen_AU
dc.subjectSurveysen_AU
dc.titleThe 6-GHz methanol multibeam maser catalogue - I. Galactic Centre region, longitudes 345? to 6?en_AU
dc.typeJournal articleen_AU
dcterms.accessRightsOpen Accessen_AU
local.bibliographicCitation.issue2en_AU
local.bibliographicCitation.lastpage1060en_AU
local.bibliographicCitation.startpage1029en_AU
local.contributor.affiliationCaswell, J.L., CSIRO Astronomy & Space-Scienceen_AU
local.contributor.affiliationPhillips, C, CSIRO, Australia Telescope National Facilityen_AU
local.contributor.affiliationFuller, G.A., University of Manchesteren_AU
local.contributor.affiliationGreen, J A, CSIRO Astronomy and Space Scienceen_AU
local.contributor.affiliationAvison, A, University of Manchesteren_AU
local.contributor.affiliationBreen, S.L., CSIRO Astronomy & Space-Scienceen_AU
local.contributor.affiliationBurton, Michael Graham, University of New South Walesen_AU
local.contributor.affiliationChrysostomou, A, University of Hertfordshireen_AU
local.contributor.affiliationCox, J, Cardiff Universityen_AU
local.contributor.affiliationDiamond, Philip John, University of Manchesteren_AU
local.contributor.affiliationMcClure-Griffiths, Naomi, College of Science, ANUen_AU
local.contributor.authoremailu1000518@anu.edu.auen_AU
local.contributor.authoruidMcClure-Griffiths, Naomi, u1000518en_AU
local.description.notesImported from ARIESen_AU
local.identifier.absfor020104 - Galactic Astronomyen_AU
local.identifier.absfor020103 - Cosmology and Extragalactic Astronomyen_AU
local.identifier.absfor020102 - Astronomical and Space Instrumentationen_AU
local.identifier.ariespublicationa383154xPUB4126en_AU
local.identifier.citationvolume404en_AU
local.identifier.doi10.1111/j.1365-2966.2010.16339.xen_AU
local.identifier.scopusID2-s2.0-77953600279
local.identifier.thomsonID000277329000032
local.identifier.uidSubmittedBya383154en_AU
local.publisher.urlhttp://www.oxfordjournals.org/en_AU
local.type.statusPublished Versionen_AU

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