J/ApJ/606/929ivo://CDS.VizieR/J/ApJ/606/929doi:10.26093/cds/vizier.16060929CDSHunter T.R.Zhang Q.Sridharan T.K.2008-07-01T16:08:41Z2008-07-01T16:06:21ZCDS support team

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

cds-question@unistra.frinfrared-sourcesinterstellar-mediumWe present high-resolution, multiwavelength-continuum, and molecular-line images of the massive star forming region IRAS 18317-0757. The global infrared through millimeter spectral energy distribution can be approximated by a two-temperature model (25 and 63K) with a total luminosity of approximately log(L/L_{sun}_)=5.2. Previous submillimeter imaging resolved this region into a cluster of five dust cores, one of which is associated with the ultracompact HII region G23.955+0.150, and another with a water maser. In our new 2.7mm continuum image obtained with BIMA, only the UCHII region is detected, with total flux and morphology in good agreement with the free-free emission in the VLA centimeter-wave maps. For the other four objects, the nondetections at 2.7mm and in the MSX mid-infrared bands are consistent with cool dust emission with a temperature of 13-40K and a luminosity of 1000-40000L_{sun}_. By combining single-dish and interferometric data, we have identified over two dozen virialized C^18^O cores in this region that contain ~40% of the total molecular gas mass present.2004ApJ...606..929Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/606/929CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/606/929https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/606/929http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/606/929https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/606/929https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/606/929http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/606/929GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/606/929/table1 (Observed emission properties of submillimeter clumps)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/606/929/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/606/929/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/606/929/table1?GETtext/xml+votable180.050000true278.605833-7.9136110.005555555555555556Cone search capability for table J/ApJ/606/929/table5 (Position and mass of C^18^O (1-0) clumps)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/606/929/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/606/929/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/606/929/table5?GETtext/xml+votable180.050000true278.5882625-7.920494440.005555555555555556Cone search capability for table J/ApJ/606/929/table7 (Stars detected in all three 2MASS bands)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/606/929/table7?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/606/929/table7?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/606/929/table7?GETtext/xml+votable180.050000true278.5837917-7.91805560.0055555555555555566/29535https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/606/929?format=asciiInfrareddefaultJ/ApJ/606/929/table1Observed emission properties of submillimeter clumpsAK? Extinction in K band, AK=0.112*AV (4)magphys.absorptionfloatnullableSourceSource name (1)meta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000? Right ascension (J2000.0)pos.eq.ra;meta.mainnullableDEJ2000? Declination (J2000.0)pos.eq.dec;meta.mainnullableS350umFlux density at 350{mu}m, within 22" apertureJyphot.flux.density;em.mm.750-1500GHzinte_S350umrms uncertainty on S350umJystat.errorintl_S2.7mmLimit flag on S2.7mm (upper limits are 3{sigma})meta.code.errorcharS2.7mmFlux density at 2.7mm, within 22" apertureJyphot.flux.density;em.mm.100-200GHzfloate_S2.7mm? rms uncertainty on S2.7mmJystat.errorfloatnullableMassMass (2)solMassphys.massinte_Massrms uncertainty on MasssolMassstat.error;phys.massintlogNH? Hydrogen column density (3)log(cm**-2)phys.columnDensityfloatnullablee_logNH? rms uncertainty on logNHlog(cm**-2)stat.errorfloatnullableAV[52/144]? Extinction in V band, in magnitudes, AV=NH/(4*10^21^) (4)phys.absorption;em.opt.VintnullableJ/ApJ/606/929/table5Position and mass of C^18^O (1-0) clumpsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintC18OSequential number, [HZS2004] C18O NNmeta.recordintRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainEmiEmissionJy.km/sphot.fluxfloatlogN(C18O)C^18^O column densitylog(cm**-2)phys.columnDensityfloatAKExtinction in K bandmagphys.absorptionfloatMH2H_2_ masssolMassphys.massintVelVelocitykm/sphys.velocfloate_Velrms uncertainty on Velkm/sstat.errorfloatPFluxPeak flux, in Jy/beamJyphot.fluxfloate_PFluxrms uncertainty on PFlux, in Jy/beamJystat.errorfloatWidthLine widthkm/sspect.line.widthfloate_Widthrms uncertainty on Widthkm/sstat.error;spect.line.widthfloatMvirialVirial mass (1)solMassphys.massintJ/ApJ/606/929/table7Stars detected in all three 2MASS bandsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar number given in Figure 12 and 13, [HZS2004] Star NNNmeta.id;meta.mainintf_Star[a] Flag on Star (1)meta.codechar2MASSThe 2MASS PSC namemeta.idchar2MASSdataDisplay the data from the 2MASS Catalog (II/246)meta.ref.urlchar_RAPosition derived from 2MASS Name (right ascension part)degpos.eq.ra;meta.main_DEPosition derived from 2MASS Name (declination part)degpos.eq.dec;meta.main