J/MNRAS/441/256ivo://CDS.VizieR/J/MNRAS/441/256doi:10.26093/cds/vizier.74410256CDSLowe V.Cunningham M.R.Urquhart J.S.Marshall J.P.Horiuchi S.Lo N.,Walsh A.J.Jordan C.H.Jones P.A.Hill T.2024-08-09T20:15:05Z2015-05-04T11:19:14ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frh-ii-regionsmolecular-cloudsradio-sourcesHere we report observations of the two lowest inversion transitions of ammonia (NH_3_) with the 70-m Tidbinbilla radio telescope. The aim of the observations is to determine the kinetic temperatures in the dense clumps of the G333 giant molecular cloud associated with RCW 106 and to examine the effect that accurate measures of temperature have on the calculation of derived quantities such as mass. This project is part of a larger investigation to understand the time-scales and evolutionary sequence associated with high-mass star formation, particularly its earliest stages. Assuming that the initial chemical composition of a giant molecular cloud is uniform, any abundance variations within will be due to evolutionary state. We have identified 63 clumps using SEST Imaging Bolometer Array 1.2-mm dust continuum maps and have calculated gas temperatures for most (78 per cent) of these dense clumps. After using Spitzer Galactic Legacy Infrared Mid-Plane Survey Extraordinaire 8.0{mu}m emission to separate the sample into infrared (IR)-bright and IR-faint clumps, we use statistical tests to examine whether our classification shows different populations in terms of mass and temperature.2014MNRAS.441..256Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/441/256CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/293 : GLIMPSE Source Catalog (I + II + 3D) (IPAC 2008)VIII/96 : 6-GHz methanol multibeam maser catalog (Caswell+ 2010-12)J/MNRAS/359/1498 : Class I and class II methanol masers (Ellingsen+, 2005)J/other/PASA/26.454 : Precise positions of methanol masers (Caswell, 2009)J/MNRAS/416/1764 : H2O Southern Galactic Plane Survey (HOPS) (Walsh+, 2011)J/MNRAS/367/1609 : RCW 106 Giant Molecular Cloud 13CO mapping (Bains+, 2006)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/441/256https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/441/256http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/441/256https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/441/256https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/441/256http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/441/256GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/441/256/clumps (Parameters of the 63 SIMBA 1.2-mm dust clumps identified with CLUMPFIND (table1) and derived physical parameters (table3))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/441/256/clumps?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/441/256/clumps?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/441/256/clumps?GETtext/xml+votable180.050000true245.535417-50.0980560.0055555555555555566/42169 42172-421731.6553710550405622e-22 1.6553710550405622e-22https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/441/256?format=asciiRadiodefaultJ/MNRAS/441/256/clumpsParameters of the 63 SIMBA 1.2-mm dust clumps identified with CLUMPFIND (table1) and derived physical parameters (table3)SpectSpectral features (4)meta.codecharDV2? NH_3_(2,2) FWHMkm/sspect.line.widthfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID1[1/63] Sequential numbermeta.idintClumpClump name (GLLL.lll+B.bbb)meta.id;meta.maincharRAJ2000Clump centroid right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Clump centroid declination (J2000)pos.eq.dec;meta.mainPeakSIMBA 1.2mm peak flux (in Jy/beam)Jyphot.flux.density;em.IRfloatRadClump radiuspcphys.size.radiusfloatIntSIMBA 1.2mm total integrated fluxJyphot.flux.density;em.mm.200-400GHzfloatAssocNearby (<30") IR and maser associations (1)meta.codecharRMStypeType of RMS object if RMS object in Assoc (2)stat.stdev;src.classcharIRtypeInfrared type (IR-bright or IR-faint) (3)meta.code.classcharRegRegion (A B C) where the clump has been allocated to (see Section 4.3 for more details)obs.fieldcharSimbadSimbad column added by the CDSmeta.ref.urlcharID3[1/63] Sequential numbermeta.idintnullablel_TrotLimit flag on Trotmeta.code.errorcharTrot[9/36]? Rotation temperatureKphys.temperaturefloatnullablel_TkinLimit flag on Tkinmeta.code.errorcharTkin[9/64]? Kinematic temperatureKphys.temperaturefloatnullablel_logNLimit flag on logNmeta.code.errorcharlogN[14/17]? NH_3_ column densitylog(cm**-2)phys.columnDensityfloatnullablel_lognLimit flag on lognmeta.code.errorcharlogn[3.6/6.2]? H_2_ volume densitylog(cm**-3)phys.densityfloatnullablel_TA*1Limit flag on TA*1meta.code.errorcharTA*1[0.2/2.5] NH_3_(1,1) antenna temperature scaleKphot.antennaTempfloatnullableV1? NH_3_(1,1) LSR velocitykm/sphys.veloc;pos.lsrfloatnullableDV1? NH_3_(1,1) FWHMkm/sspect.line.widthfloatnullabletau1? Optical depth of NH_3_ transition, {tau}(m,1,1)phys.absorption.opticalDepthfloatnullableTA*2[0.1/1.8]? NH_3_(2,2) antenna temperatureKphot.antennaTempfloatnullableV2? NH_3_(2,2) LSR velocitykm/sphys.veloc;pos.lsrfloatnullablelogMCl[2.4/4.2]? Clump masslog(solMass)phys.massfloatnullablelogMVir[2.0/3.7]? Virial masslog(solMass)phys.massfloatnullable