J/A+A/598/A76ivo://CDS.VizieR/J/A+A/598/A76doi:10.26093/cds/vizier.35980076CDSZhang C.-P.Yuan J.-H.Li G.-X.Zhou J.-J.Wang J.-J.2019-06-03T13:17:54Z2017-02-03T07:40:58ZCDS support team

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

cds-question@unistra.frradio-astronomyInfrared dark clouds (IRDCs) are ubiquitous in the Milky Way, yet they play a crucial role in breeding newly-formed stars. In order to further understand the dynamics, chemistry, and evolution of IRDCs, we carried out multi-wavelength observations towards a small sample. We performed new observations with the IRAM 30m and CSO 10.4m telescopes, with tracers HCO^+^, HCN, N_2_H^+^, C^18^O, DCO^+^, SiO, and DCN towards six IRDCs G031.97+00.07, G033.69-00.01, G034.43+00.24, G035.39-00.33, G038.95-00.47, and G053.11+00.05.2017A&A...598A..76Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/598/A76CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/552/A40 : MSX high-contrast IRDCs with NH_3_ (Chira+, 2013)J/A+A/570/A51 : Molecular lines in 4 IRCS clumps (Shipman+, 2014)J/A+A/571/A53 : 4 IRDC data cubes (Beuther+, 2014)J/A+A/578/A29 : Column density maps in 4 IRDCs (Schneider+, 2015)J/A+A/579/A51 : Kinematic and thermal structure of IRDCs (Bihr+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/598/A76https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/598/A76http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/598/A76https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/598/A76https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/598/A76http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/598/A76GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/598/A76/table2 (Parameters (coordinate, distance, mass, density, etc.) of the selected cores in the IRDCs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/598/A76/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/598/A76/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/598/A76/table2?GETtext/xml+votable180.050000true282.40125-0.76250.005555555555555556Cone search capability for table J/A+A/598/A76/list (List of datacubes)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/598/A76/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/598/A76/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/598/A76/list?GETtext/xml+votable180.050000true282.38524-0.747720.0055555555555555566/30312 30315 30318-30319 30330 30421 307162.283270615984385e-22 2.283270615984385e-22https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/598/A76?format=asciiRadiodefaultJ/A+A/598/A76/table2Parameters (coordinate, distance, mass, density, etc.) of the selected cores in the IRDCsDistDistance (2)kpcpos.distance;pos.heliocentricfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCoreCore name (GNN-NN) (G1)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainRcoreCode radiuspcphys.angSize;srcfloatTdustDust temperatureKphys.temperaturefloate_Tdustrms uncertainty on TdustKstat.errorfloatI870umIntegrated flux at 870umJy/beamphot.flux.density;em.mm.200-400GHzfloate_I870umrms uncertainty on I870umJy/beamstat.errorfloatS870umFlux density at 870umJyphot.flux.density;em.mm.200-400GHzfloate_S870umrms uncertainty on S870umJystat.errorfloatDVN2H+N_2_H^+^ FWHMkm/sspect.line.widthfloate_DVN2H+rms uncertainty on DVN2H+km/sstat.errorfloattauN2H+N_2_H^+^ optical depthphys.absorption.opticalDepthfloate_tauN2H+rms uncertainty on tauN2H+stat.errorfloatMvirVirial masssolMassphys.massinte_Mvirrms uncertainty on MvirsolMassstat.errorintM870umMass at 870umsolMassphys.massinte_M870umrms uncertainty on M970umsolMassstat.errorintM1.1mm? Mass at 1.1mmsolMassphys.massintnullablealphaVirVirial alpha parameter (Mvir/M870um)phys.mass;arith.ratiofloate_alphaVirrms uncertainty on alphaVirstat.errorfloatn870umVolume density at 870um (M870um/(2Rcore)^3^))10000cm**-3phys.densityfloate_n870umrms uncertainty on n870um10000cm**-3stat.errorfloatSimbadSimbad column added by the CDSmeta.ref.urlcharJ/A+A/598/A76/table3Gaussian fitting parameters (integrated intensity, velocity, FWHM, and intensity of HCO^+^, HNC, and C^18^O) with masking absorption dip towards the selected cores in the IRDCsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCoreCode name (GNN-NN) (G1)meta.id;meta.maincharSHCO+HCO^+^ flux densityK.km/sphot.fluxfloate_SHCO+rms uncertainty on SHCO+K.km/sstat.errorfloatVHCO+HCO^+^ velocitykm/sspect.dopplerVelocfloate_VHCO+rms uncertainty on VHCO+km/sstat.errorfloatDHCO+HCO^+^ FWHMkm/sspect.line.widthfloate_DHCO+rms uncertainty on DHCO+km/sstat.errorfloatIHCO+HCO^+^ integrated fluxKphot.fluxfloate_IHCO+rms uncertainty on IHCO+Kstat.errorfloatSHNCHNC flux densityK.km/sphot.fluxfloate_SHNCrms uncertainty on SHNCK.km/sstat.errorfloatVHNCHNC velocitykm/sspect.dopplerVelocfloate_VHNCrms uncertainty on VHNCkm/sstat.errorfloatDHNCHNC FWHMkm/sspect.line.widthfloate_DHNCrms uncertainty on DHNCkm/sstat.errorfloatIHNCHNC integrated fluxKphot.fluxfloate_IHNCrms uncertainty on IHNCKstat.errorfloatSC18OC^18^O flux densityK.km/sphot.fluxfloate_SC18Orms uncertainty on SC18OK.km/sstat.errorfloatVC18OC^18^O velocitykm/sspect.dopplerVelocfloate_VC18Orms uncertainty on VC18Okm/sstat.errorfloatDC18OC^18^O FWHMkm/sspect.line.widthfloate_DC18Orms uncertainty on DC18Okm/sstat.errorfloatIC18OC^18^O integrated fluxKphot.fluxfloate_IC18Orms uncertainty on IC18OKstat.errorfloatJ/A+A/598/A76/table4Parameters of the detected DCO^+^, SiO, and DCN in the IRDCsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCoreCode name (GNN-NN)meta.id;meta.maincharVelVelocitykm/sphys.velocfloate_Velrms uncertainty on Velocitykm/sstat.errorfloatDV(DCO+)DCO^+^ FWHMkm/sspect.line.widthfloate_DV(DCO+)rms uncertainty on DV(DCO+)km/sstat.errorfloatTMB(DCO+)DCO^+^ main beam temperatureKphys.temperature;meta.mainfloate_TMB(DCO+)rms uncertainty on TMB(DCO+)Kstat.errorfloatDV(SiO)SiO FWHMkm/sspect.line.widthfloate_DV(SiO)rms uncertainty on DV(SiO)km/sstat.errorfloatTMB(SiO)SiO main beam temperatureKphys.temperature;meta.mainfloate_TMB(SiO)rms uncertainty on TMB(SiO)Kstat.errorfloatDV(DCN)? DCN FWHMkm/sspect.line.widthfloatnullablee_DV(DCN)? rms uncertainty on DV(DCN)km/sstat.errorfloatnullableTMB(DCN)? DCN main beam temperatureKphys.temperature;meta.mainfloatnullablee_TMB(DCN)? rms uncertainty on TMB(DCN)Kstat.errorfloatnullableJ/A+A/598/A76/listList of datacubesNzNumber of slicesmeta.numberintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension of center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainNxNumber of pixels along X-axismeta.numberintNyNumber of pixels along Y-axismeta.numberintbVelLower value of velocity intervalm/sphys.velocdoubleBVelUpper value of velocity intervalm/sphys.velocdoubledVelVelocity resolutionm/sspect.resolutionfloatsizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fits