J/A+A/587/A96ivo://CDS.VizieR/J/A+A/587/A96doi:10.26093/cds/vizier.35870096CDSPon A.Johnstone D.Caselli P.Fontani F.Palau A.Butler M.J.,Kaufman M.Jimenez-Serra I.Tan J.C.2017-10-18T14:43:58Z2016-02-24T07:38:15ZCDS support team

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

cds-question@unistra.frmolecular-cloudsradio-sourcesco-line-emissionspectroscopyInfrared dark clouds are kinematically complex molecular structures in the interstellar medium that can host sites of massive star formation. We present maps measuring 4 square arcminutes of the ^12^CO, ^13^CO, and C^18^O J=3 to 2 lines from selected locations within the C and F (G028.37+00.07 and G034.43+00.24) infrared dark clouds (IRDCs), as well as single pointing observations of the ^13^CO and C^18^O J=2 to 1 lines towards three cores within these clouds. We derive CO gas temperatures throughout the maps and find that CO is significantly frozen out within these IRDCs. We find that the CO depletion tends to be the highest near column density peaks with maximum depletion factors between 5 and 9 in IRDC F and between 16 and 31 in IRDC C. We also detect multiple velocity components and complex kinematic structure in both IRDCs. Therefore, the kinematics of IRDCs seem to point to dynamically evolving structures yielding dense cores with considerable depletion factors.2016A&A...587A..96Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/587/A96CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/587/A96https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/587/A96http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/587/A96https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/587/A96https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/587/A96http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/587/A96GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/587/A96/list (List of fits spectra)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/587/A96/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/587/A96/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/587/A96/list?GETtext/xml+votable180.050000true280.69563-4.069030.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/587/A966/30256 30318https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/587/A96?format=asciiRadioOpticaldefaultJ/A+A/587/A96/listList of fits spectrarecnoRecord 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 pointsmeta.numberintObs.dateObservation date (YYYY-MM-DDThh:mm:ss.sss)time.epoch;obsnullablebFREQLower value of frequency intervalHzem.freqdoubleBFREQUpper value of frequency intervalHzem.freqdoubledFREQ[195312] Frequency resolutionHzspect.resolutionintsize[90] Size of FITS fileKibytephys.size;meta.fitsintspShow the spectrummeta.ref.urlcharFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitsAssocDataAssociated Data web pagemeta.bib.pagechar