J/MNRAS/452/637ivo://CDS.VizieR/J/MNRAS/452/637doi:10.26093/cds/vizier.74520637CDSMaud L.T.Lumsden S.L.Moore T.J.T.Mottram J.C.Urquhart J.S.,Cicchini A.2024-08-15T20:14:47Z2016-04-01T15:23:08ZCDS support team

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

cds-question@unistra.fryoung-stellar-objectschemical-abundancesinfrared-sourcesstellar-massesWe analyse C^18^O (J=3-2) data from a sample of 99 infrared (IR)-bright massive young stellar objects (MYSOs) and compact HII regions that were identified as potential molecular-outflow sources in the Red MSX Source survey. We extract a distance-limited (D<6kpc) sample shown to be representative of star formation covering the transition between the source types. At the spatial resolution probed, Larson-like relationships are found for these cores, though the alternative explanation, that Larson's relations arise where surface-density-limited samples are considered, is also consistent with our data. There are no significant differences found between source properties for the MYSOs and HII regions, suggesting that the core properties are established prior to the formation of massive stars, which subsequently have little impact at the later evolutionary stages investigated. There is a strong correlation between dust-continuum and C^18^O-gas masses, supporting the interpretation that both trace the same material in these IR-bright sources. A clear linear relationship is seen between the independently established core masses and luminosities. The position of MYSOs and compact HII regions in the mass-luminosity plane is consistent with the luminosity expected from the most massive protostar in the cluster when using an ~40 percent star formation efficiency and indicates that they are at a similar evolutionary stage, near the end of the accretion phase.2015MNRAS.452..637Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/452/637CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/461/11 : Radio observations of MYSO candidates (Urquhart+, 2007)J/A+A/487/253 : The RMS survey: ^13^CO observations of YSOs (Urquhart+ 2008)J/A+A/501/539 : RMS survey. 6cm observations of YSOs (Urquhart+, 2009)J/ApJS/208/11 : The Red MSX Source Survey: massive protostars (Lumsden+, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/452/637https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/452/637http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/452/637https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/452/637https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/452/637http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/452/637GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/452/637/table1 (Source parameters for all objects in the sample, taken from the RMS survey online archive)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/452/637/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/452/637/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/452/637/table1?GETtext/xml+votable180.050000true274.8-20.791670.0055555555555555566/3157 3195 3198 3271 3290 3309 3606 3649 3728-3729 14063 14241 14267 14280 14282 14287 14304 14307 14309 14317 14622 14630 14655 14666 14671 14682 14689 14692 14697 14704 14713 14716 15368 15428 15430 15629 15681 15696 21504 22122 22243 23637 23764 23773 23969 29070 29100-29101 29112 29504 29513 29522 29533-29535 30219 30256 30262 30268 30315 30422 30618 30622 30694-30695 30717 30719 40619https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/452/637?format=asciiInfrareddefaultJ/MNRAS/452/637/table1Source parameters for all objects in the sample, taken from the RMS survey online archiveONameOther associationmeta.id.assoccharLumLuminositysolLumphys.luminosityintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMSXMSX source name (GLLL.llll+BB.bbbb)meta.id;meta.maincharprimaryn_MSX[*] Note on MSX (1)meta.notecharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainTypeSource typesrc.classcharVLSRLSR velocitykm/sphys.veloc;pos.lsrfloatDistDistancekpcpos.distance;pos.heliocentricfloatIRASIRAS source name (HHMMm+DDMMA)meta.idcharOffset? MSX-IRAS sources offsetarcsecpos.angDistanceintnullableRMSDisplay the RMS data (Urquhart et al., 2008, Cat. J/A+A/487/253)meta.ref.urlcharMSX6CDisplay the MSX6C data (Egan et al., 2003, Cat. V/114)meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/MNRAS/452/637/table2Optical depths, main-beam brightness temperatures, excitation temperatures and abundance ratios for all source with strong C^18^O emissionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMSXMSX source namemeta.id;meta.maincharn_MSX[*] Note on MSX (1)meta.notecharTmb13Main-beam brightness temperature for ^13^COKspect.line.intensity;em.line.CO;spect.linefloate_Tmb13rms uncertainty on Tmb13Kstat.errorfloatTmb18Main-beam brightness temperature for C^18^OKphys.temperaturefloate_Tmb18rms uncertainty on Tmb18Kstat.errorfloattau13? Optical depth for ^13^COphys.absorption.opticalDepthfloatnullableE_tau13? Error on tau13 (upper value)stat.error;stat.maxfloatnullablen_E_tau13[i] i for infinitymeta.notechare_tau13? Error on tau13 (lower value)stat.errorfloatnullablel_tau18[~] Limit flag on tau18meta.code.errorchartau18? Optical depth for C^18^Ophys.absorption.opticalDepthfloatnullableE_tau18? Error on tau18 (upper value)stat.error;stat.maxfloatnullablen_E_tau18[i] i for infinitymeta.notechare_tau18? Error on tau18 (lower value)stat.errorfloatnullableTexExcitation temperatureJphys.atmol.excitationfloatE_TexError on Tex (upper value)Jstat.error;stat.maxfloate_TexError on Tex (lower value)Jstat.errorfloatAbs[yes/no ] Self absorptionphys.absorptionchar13CO/C18O^13^CO/C^18^O abundance ratiospect.line.intensity;arith.ratiofloatH2/C18OH_2_/C^18^O abundance ratiospect.line.intensity;arith.ratiofloatJ/MNRAS/452/637/table3Measured parameters for all sourcese_AmassAperture mass errorsolMassstat.errorintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMSXMSX source namemeta.id;meta.maincharTypeSource typesrc.classcharSpNoiseSpectral noiseKstat.snr;instr.det.noisefloatb_VelCLower value of velocity rangekm/sphys.velocfloatB_VelCUpper value of velocity rangekm/sphys.velocfloatMNoiseMap noiseK.km/sinstr.det.noisefloatFWHMFWHMkm/sspect.line.widthfloatVelCCentroid velocitykm/sphys.velocfloatAmassMass determined with polygon aperture methodsolMassphys.massintGmassMass determined with Gaussian summation fittingsolMassphys.massinte_GmassGaussian mass errorsolMassstat.errorintDradDeconvolution radiuspcpos.distancefloatFlagMass flag (1)meta.code.errorintJ/MNRAS/452/637/table4Continuum masses for a number of sources in the sample from BOLOCAM, SCUBA and other 1.2mm observationrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMSXMSX source namemeta.id;meta.maincharTypeSource typesrc.classcharMBOLOCAM? Mass, from 1.1mm BOLOCAM observation (1)solMassphys.massintnullableMSCUBA? Mass, from 850um SCUBA observation(1)solMassphys.massintnullableM1.2mm? Mass, from other 1.2 mm observation (1)solMassphys.massintnullable