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The JCMT Legacy Survey of the Gould Belt: mapping 13CO and C18O in Orion A

dc.contributor.authorBUCKLE, J. V.
hal.structure.identifierSpace Science and Technology Department [Didcot] [RAL Space]
dc.contributor.authorDAVIS, C. J.
hal.structure.identifierHerzberg Institute of Astrophysics
dc.contributor.authorDI FRANCESCO, J.
dc.contributor.authorGRAVES, S. F.
hal.structure.identifierSchool of Physics and Astronomy [Cardiff]
dc.contributor.authorNUTTER, D.
dc.contributor.authorRICHER, J. S.
dc.contributor.authorROBERTS, J. F.
hal.structure.identifierSchool of Physics and Astronomy [Cardiff]
dc.contributor.authorWARD-THOMPSON, D.
hal.structure.identifierEngineering Department
dc.contributor.authorWHITE, G. J.
dc.contributor.authorBRUNT, C.
dc.contributor.authorBUTNER, H. M.
dc.contributor.authorCAVANAGH, B.
dc.contributor.authorCHRYSOSTOMOU, A.
dc.contributor.authorCURTIS, E. I.
hal.structure.identifierFORMATION STELLAIRE 2012
dc.contributor.authorDUARTE-CABRAL, A.
dc.contributor.authorETXALUZE, M.
hal.structure.identifierforeign laboratories [FL]
dc.contributor.authorFICH, M.
dc.contributor.authorFRIBERG, P.
dc.contributor.authorFRIESEN, R.
dc.contributor.authorFULLER, G. A.
dc.contributor.authorGREAVES, J. S.
dc.contributor.authorHATCHELL, J.
hal.structure.identifierforeign laboratories [FL]
dc.contributor.authorHOGERHEIJDE, M. R.
hal.structure.identifierNatl Res Council Canada, Herzberg Inst Astrophys, Victoria, BC V9E 2E7 Canada
dc.contributor.authorJOHNSTONE, D.
dc.contributor.authorMATTHEWS, B.
dc.contributor.authorMATTHEWS, H.
dc.contributor.authorRAWLINGS, J. M. C.
hal.structure.identifierHerzberg Institute of Astrophysics
dc.contributor.authorSADAVOY, S.
dc.contributor.authorSIMPSON, R. J.
dc.contributor.authorTOTHILL, N. F. H.
dc.contributor.authorTSAMIS, Y. G.
hal.structure.identifierInstitut de Planétologie et d'Astrophysique de Grenoble [IPAG ]
dc.contributor.authorVITI, S.
dc.contributor.authorWOUTERLOOT, J. G. A.
dc.contributor.authorYATES, J.
dc.date.created2012-01-26
dc.date.issued2012
dc.identifier.issn0035-8711
dc.description.abstractEnThe Gould Belt Legacy Survey will map star-forming regions within 500 pc, using HARP (Heterodyne Array Receiver Programme), SCUBA-2 (Submillimetre Common-User Bolometer Array 2) and POL-2 (Polarimeter 2) on the James Clerk Maxwell Telescope (JCMT). This paper describes HARP observations of the J = 3-2 transitions of 13CO and C18O towards Orion A. The 1500-resolution observations cover 5 pc of the Orion filament, including OMC1 (inc. BN-KL and Orion Bar), OMC 2/3 and OMC 4, and allow a comparative study of the molecular gas properties throughout the star-forming cloud. The filament shows a velocity gradient of ~1 km/s /pc between OMC 1, 2 and 3, and high velocity emission is detected in both isotopologues. The Orion Nebula and Bar have the largest masses and line widths, and dominate the mass and energetics of the high velocity material. Compact, spatially resolved emission from CH3CN, 13CH3OH, SO, HCOOCH3, C2H5OH, CH3CHO and CH3OCHO is detected towards the Orion Hot Core. The cloud is warm, with a median excitation temperature of ~24 K; the Orion Bar has the highest excitation temperature gas, at >80 K. The C18O excitation temperature correlates well with the dust temperature (to within 40%). The C18O emission is optically thin, and the 13CO emission is marginally optically thick; despite its high mass, OMC 1 shows the lowest opacities. A virial analysis indicates that Orion A is too massive for thermal or turbulent support, but is consistent with a model of a filamentary cloud that is threaded by helical magnetic fields. The variation of physical conditions across the cloud is reflected in the physical characteristics of the dust cores....continued
dc.language.isoen
dc.publisherOxford University Press (OUP): Policy P - Oxford Open Option A
dc.subject.enAstrophysics
dc.subject.enGalaxy Astrophysics
dc.title.enThe JCMT Legacy Survey of the Gould Belt: mapping 13CO and C18O in Orion A
dc.typeArticle de revue
dc.identifier.doi10.1111/j.1365-2966.2012.20628.x
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR]
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR]
dc.identifier.arxiv1201.5483
bordeaux.journalMonthly Notices of the Royal Astronomical Society
bordeaux.page521-541
bordeaux.volume422
bordeaux.issue1
bordeaux.peerReviewedoui
hal.identifierhal-00665201
hal.version1
hal.popularnon
hal.audienceNon spécifiée
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00665201v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Monthly%20Notices%20of%20the%20Royal%20Astronomical%20Society&rft.date=2012&rft.volume=422&rft.issue=1&rft.spage=521-541&rft.epage=521-541&rft.eissn=0035-8711&rft.issn=0035-8711&rft.au=BUCKLE,%20J.%20V.&DAVIS,%20C.%20J.&DI%20FRANCESCO,%20J.&GRAVES,%20S.%20F.&NUTTER,%20D.&rft.genre=article


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