J/ApJS/181/255ivo://CDS.VizieR/J/ApJS/181/255doi:10.26093/cds/vizier.21810255CDSAnderson L.D.Bania T.M.Jackson J.M.Clemens D.P.Heyer M.Simon R.,Shah R.Y.Rathborne J.M.2017-07-03T14:26:50Z2011-03-07T11:51:23ZCDS support team

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

cds-question@unistra.frh-ii-regionsradio-astronomyinterstellar-mediumWe derive the molecular properties for a sample of 301 Galactic HII regions including 123 ultra compact (UC), 105 compact, and 73 diffuse nebulae. We analyze all sources within the BU-FCRAO Galactic Ring Survey (GRS) of ^13^CO emission known to be HII regions based upon the presence of radio continuum and cm-wavelength radio recombination line emission. Unlike all previous large area coverage ^13^CO surveys, the GRS is fully sampled in angle and yet covers ~75deg^2^ of the Inner Galaxy. The angular resolution of the GRS (46") allows us to associate molecular gas with HII regions without ambiguity and to investigate the physical properties of this molecular gas. We find clear CO/HII morphological associations in position and velocity for ~80% of the nebular sample. Compact HII region molecular gas clouds are on average larger than UC clouds: 2.2' compared to 1.7'.2009ApJS..181..255Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/181/255CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/58 : A Survey of Radio H II Regions in the Northern Sky (Lockman+ 1989)VII/50 : CO Radial Velocities Toward Galactic H II Regions (Blitz+ 1982)J/A+A/417/107 : CO velocities in southern HII regions (Russeil+, 2004)J/ApJ/690/706 : Distances for HII regions (Anderson+, 2009)http://www.bu.edu/galacticring : BU-FCRAO GRS home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/181/255https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/181/255http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/181/255https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/181/255https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/181/255http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/181/255GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/181/255/hiireg (Properties of molecular cloud HII region sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/181/255/hiireg?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/181/255/hiireg?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/181/255/hiireg?GETtext/xml+votable180.050000true274.42083-15.880560.0055555555555555565/7377 7383 7564 7604 7654 6/29118 29119 29461 29504 29505 29522 29523 29528 29529 30218 30219 30222 30240 30241 30244 30245 30247 30262 30263 30268 30269 30312 30313 30315 30317 30318 30319 30330 30405 30420 30422 30423 30594 30595 30600 30601 30604 30605 30622 30623 30644 30645 30691 30692 30694 30695 30701 30706 30707 30712 30715 30716 30718 30719https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/181/255?format=asciiRadiodefaultJ/ApJS/181/255/hiiregProperties of molecular cloud HII region samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource name (ALL.ll+B.bba)meta.idcharn_NameAdditional comments (1)meta.notecharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainVLSRLocal Standard of Rest velocitykm/sphys.veloc;pos.lsrfloate_VLSRUncertainty in VLSRkm/sstat.error;phys.veloc;pos.lsrfloatAutAuthor's name of the referencemeta.bib.authorcharBibCodeBibcode of the referencemeta.bib.bibcodecharGLONf? Fitted ellipse Galactic longitudedegpos.galactic.lonnullableGLATf? Fitted ellipse Galactic latitudedegpos.galactic.latfloatnullableSize? Fitted ellipse sizearcminphys.angSizefloatnullableMajAxis? Fitted ellipse semi-major axisarcminphys.angSize.smajAxis;meta.modelledfloatnullableMinAxis? Fitted ellipse semi-minor axisarcminphys.angSize;srcfloatnullablePA[-90/+90]? Fitted ellipse position angledegpos.posAng;meta.modelledfloatnullableVel? Fitted gaussian velocitykm/sphys.velocfloatnullablee_Vel? The 1{sigma} uncertainty in Velkm/sstat.errorfloatnullableTMB? Fitted gaussian brightness temperatureKphys.temperature;meta.modelledfloatnullablee_TMB? The 1{sigma} uncertainty in TMBKstat.errorfloatnullableDelV? Fitted gaussian FWHM line widthkm/sspect.line.width;meta.modelledfloatnullablee_DelV? The 1{sigma} uncertainty in DelVkm/sstat.errorfloatnullableTex? CO excitation temperatureKspect.line.intensity;em.line.CO;spect.linefloatnullableN13CO? The ^13^CO column density1e+16cm**-2phys.columnDensityfloatnullableCP[A-E] Nebular confidence parameter (1)meta.code.qualcharSimbadSimbad column added by the CDSmeta.refchar