J/A+A/432/921ivo://CDS.VizieR/J/A+A/432/921doi:10.26093/cds/vizier.34320921CDSFontani F.Beltran M.T.Brand J.Cesaroni R.Testi L.Molinari S.,Walmsley C.M.2006-09-24T21:36:20Z2006-09-24T21:32:18ZCDS support team

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

cds-question@unistra.fryoung-stellar-objectsradio-astronomyinterstellar-mediumWe have observed two rotational transitions of both CS and C^17^O, and the 1.2mm continuum emission towards a sample of 130 high-mass protostellar candidates with DE<-30{deg}. This work represents the first step of the extension to the southern hemisphere of a project started more than a decade ago aimed at the identification of massive protostellar candidates. Following the same approach adopted for sources with DE>=-30{deg}, we have selected from the IRAS Point Source Catalogue 429 sources which potentially are compact molecular clouds on the basis of their IR colours. The sample has then been divided into two groups according to the colour indices [25-12] and [60-12]: the 298 sources with [25-12]>=0.57 and [60-12]>=1.30 have been called High sources, the remaining 131 have been called Low sources. In this paper, we check the association with dense gas and dust in 130 Low sources. We have obtained a detection rate of ~85% in CS, demonstrating a tight association of the sources with dense molecular clumps.2005A&A...432..921Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/432/921CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/125 : IRAS catalogue of Point Sources, Version 2.0 (IPAC 1986)Table 1: Observed transitions.Note (1): The two values refer to the two spectrometers used.https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/432/921https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/432/921http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/432/921https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/432/921https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/432/921http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/432/921GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/432/921/tablea1 (Observed sources and detection summary)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/432/921/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/432/921/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/432/921/tablea1?GETtext/xml+votable180.050000true125.717917-42.13250.0055555555555555566/28806-28808 28813 28815 28824-28825 37244 37331 37334 37361 37364 37366 37752 37844 37846 37848 37850 37882 37887 37889 37894-37895 37897 37902 37929-37932 37934 38016 38024 39248 39267 39273 41598-41599 41655-41656 41660 41663 41673 41676-41678 41682-41683 41706 41758 41766 41772 41777 41780 41801 41803 41806 41813-41816 42154 42169-42173 42211 42213 42216-42217 42224-42225 42227-42229 42379 42381-42382 42389 42392-42393 42397 42407 42444 42449-42450 42456-42458 42460 42496-42497 42512 43015 43024 43041https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/432/921?format=asciiRadiodefaultJ/A+A/432/921/tablea1Observed sources and detection summaryCS[Y NO] CS detection flag (2)meta.codecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIRASIRAS name (HHMMm-DDMM)meta.id;meta.maincharprimaryRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVLSRI? Run I LSR velocity (1)km/sspect.dopplerVeloc;em.opt.IfloatnullableVLSRII? Run II LSR velocity (1)km/sspect.dopplerVeloc;pos.lsrfloatnullableC17O[Y NO] C^17^O detection flag (2)meta.codechar1.2mm[Y NO c] Detection flag at 1.2mm continuum (2)meta.codecharDelta? Angular separation between the IRAS position and the nearest millimeter peak detected in the SIMBA mapsarcsecpos;arith.diffintnullableu_Delta[?] Uncertainty flag on Deltameta.code.error;pos.eq.deccharJ/A+A/432/921/tablea2*CS line parameters obtained from Gaussian fitsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIRASIRAS name (HHMMm-DDMM)meta.id;meta.maincharn_IRAS[*] Note on Source (1)meta.notecharl_ITMB1[<= ] Limit flag on ITMB1meta.code.errorcharITMB1CS(2-1) brightness temperature integrated over velocityK.km/sspect.line.intensityfloatn_ITMB1[*] Note on the origin of line parameters (2)meta.notecharITMB1l? Lower value of ITMB1 intervalK.km/sspect.line.intensityfloatnullableITMB1u? Upper value of ITMB1 intervalK.km/sspect.line.intensityfloatnullableVLSR1? CS(2-1) LSR velocitykm/sspect.dopplerVelocfloatnullableVLSR1l? Lower value of VLSR1 intervalkm/sinstr.bandwidthintnullableVLSR1u? Upper value of VLSR1 intervalkm/sinstr.bandwidthintnullableFWHM1? CS(2-1) FWHMkm/sspect.line.widthfloatnullablel_ITMB2[<= ] Limit flag on ITMB2meta.code.errorcharITMB2CS(3-2) brightness temperature integrated over velocityK.km/sspect.line.intensityfloatn_ITMB2[*] Note on ITMB2 (3)meta.notecharVLSR2? CS(3-2) LSR velocitykm/sspect.dopplerVelocfloatnullableVLSR2l? Lower value of VLSR2 intervalkm/sinstr.bandwidthintnullableVLSR2u? Upper value of VLSR2 intervalkm/sinstr.bandwidthintnullableFWHM2? CS(3-2) FWHMkm/sspect.line.widthfloatnullableJ/A+A/432/921/tablea3*C^17^O line parametersl_t10Limit flag on t10meta.code.errorcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIRASIRAS name (HHMMm-DDMM)meta.id;meta.maincharV1l? C^17^O(1-0) lower limit of velocity rangekm/sinstr.bandwidthintnullableV1u? C^17^O(1-0) upper limit of velocity rangekm/sinstr.bandwidthintnullableNote1[N] if not observed in the C^17^O (1-0) and (2-1) linesmeta.notecharl_ITMB1[<=] Limit flag on ITMB1meta.code.errorcharITMB1? C^17^O(1-0) brightness temperature integrated over velocityK.km/sspect.line.intensityfloatnullableVLSR1? C^17^O(1-0) LSR velocitykm/sspect.dopplerVelocfloatnullableFWHM1? C^17^O(1-0) FWHMkm/sspect.line.widthfloatnullablet10? C^17^O(1-0) optical depthphys.absorption.opticalDepthfloatnullableV2l? C^17^O(2-1) lower limit of velocity rangekm/sinstr.bandwidthintnullableV2u? C^17^O(2-1) upper limit of velocity rangekm/sinstr.bandwidthintnullableNote2[N] N: Not observed in the C^17^O(2-1) linemeta.notecharl_ITMB2[<=] Limit flag on ITMB2meta.code.errorcharITMB2? C^17^O(2-1) brightness temperature integrated over velocityK.km/sspect.line.intensityfloatnullableVLSR2? C^17^O(2-1) LSR velocitykm/sspect.dopplerVelocfloatnullableFWHM2? C^17^O(2-1) FWHMkm/sspect.line.widthfloatnullablel_t21Limit flag on t21meta.code.errorchart21? C^17^O(2-1) optical depthphys.absorption.opticalDepthfloatnullableJ/A+A/432/921/tablea4Distance-independent parameters of the clumpsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIRASIRAS name (HHMMm-DDMM)meta.id;meta.maincharl_thetaLimit flag on thetameta.code.error;pos.posAngchartheta? Angular diameterarcsecphys.angSizefloatnullablen_theta[#] Note on theta (#: unresolved sources)meta.notecharFnu? Integrated flux density, derived from the 1.2mm continuum mapsJyphot.flux.density;em.mm.200-400GHzfloatnullableTrot? Rotation temperatureKphys.temperatureintnullableNC17O? C^17^O column density1e+15cm**-2phys.columnDensityfloatnullableNH2? H_2_ total column density, derived from C^17^O line ratios (1)cm**-2phys.columnDensitydoublenullablenH2? H_2_ volume density, obtained from CS line ratioscm**-3phys.densitydoublenullableJ/A+A/432/921/tablea5Distance, linear size, luminosity, and dust temperature of all sources detected in CSTd? Dust temperatureKphys.temperatureintnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIRASIRAS name (HHMMm-DDMM)meta.id;meta.maincharn_IRAS[*] *: Resolved distance ambiguitymeta.notechardnear? Near distancekpcpos.distance;pos.heliocentricfloatnullabledfar? Far distance (1)kpcpos.distance;pos.heliocentricfloatnullablen_dfar[+] +: No distance estimatemeta.notecharDnear? Near linear size (1)pcpos.distance;pos.heliocentricfloatnullableDfar? Far linear size (1)pcpos.distance;pos.heliocentricfloatnullableLnear? Near luminosity1000solLumphys.luminosityfloatnullableLfar? Far luminosity1000solLumphys.luminositydoublenullableJ/A+A/432/921/tablea6Clumps massesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIRASIRAS name (HHMMm-DDMM)meta.id;meta.maincharMcnear? Near clump mass estimated from 1.2mm continuumsolMassphys.massintnullableMcfar? Far clump mass estimated from 1.2mm continuumsolMassphys.massintnullableMvirnear? Near clump mass assuming virial equilibriumsolMassphys.massintnullableMvirfar? Far clump mass assuming virial equilibriumsolMassphys.massintnullableMC17Onear? Near clump mass from C^17^O masssolMassphys.massintnullableMC17Ofar? Far clump mass from C^17^O masssolMassphys.massintnullableMCSnear? Near clump mass from CS masssolMassphys.massintnullableMCSfar? Far clump mass from CS masssolMassphys.massintnullable