J/ApJS/63/821ivo://CDS.VizieR/J/ApJS/63/821doi:10.26093/cds/vizier.20630821CDSScoville N.Z.Yun Min SuSanders D.B.Clemens D.P.Waller W.H.2012-11-13T06:16:40Z2000-12-06T22:00:34ZCDS support team

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

cds-question@unistra.frco-line-emissioninterstellar-mediumh-ii-regionsA compilation of CO emission regions and their measured parameters is presented which represents a nearly complete accounting of the molecular clouds in the first quadrant of the Galaxy. Emission regions associated with radio H II regions have systematically brighter CO peaks that are a factor of two to three times larger and have twice the mean velocity dispersion as the general cloud population. Both the H II region clouds and the hot core regions have a Galactic distribution characteristic of a spiral arm population, whereas the colder clouds are much less confined in Galactic azimuthal angle. Virial masses are obtained for the large sample of clouds with assigned kinematic distances. The mean H2 density for a GMC of diameter 40 pc is 180cm^-3^. For these clouds, a linear relationship is found between the H2 column density and the integrated CO emission. The variation in the Z-dispersion of clouds as a function of cloud mass suggests that more massive GMCs have smaller random velocities.1987ApJS...63..821Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/63/821CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/63/821https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/63/821http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/63/821https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/63/821https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/63/821http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/63/821GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/63/821/table1 (CO Clouds and Hot Cores)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/63/821/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/63/821/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/63/821/table1?GETtext/xml+votable180.050000true271.3621-22.27990.005555555555555556Cone search capability for table J/ApJS/63/821/table2 (H II Region Clouds)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/63/821/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/63/821/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/63/821/table2?GETtext/xml+votable180.050000true272.3652-20.39660.0055555555555555565/3589 3670 7229 7275 7278 7279 7376 7377 7382 7383 7564 7578 7579 7604 7605 7648 7651 7654 7673 7678 7679 6/12968 12970 12971 12974 12975 14336 14341 14352 14353 14355 14402 14406 14409 14412 14419 14423 14594 14600 14601 14603 14604 14607 14617 14618 14621 14622 14623 14625 14641 14644 14645 14665 14666 14667 14668 14670 14671 14684 14685 14687 14688 14689 14692 14693 14704 14705 14709 15362 15363 15368 15370 15374 15385 28924 28925 29088 29090 29091 29094 29096 29097 29099 29162 29163 29445 29456 29457 29460 29461 29463 29517 29520 29522 29523 29526 30216 30218 30219 30222 30223 30240 30241 30244 30245 30247 30260 30262 30263 30265 30268 30269 30306 30328 30330 30331 30405 30428 30429 30598 30600 30601 30622 30623 30641 30644 30645 30647 30666 30688 30689 30691 30701 30706 30707 30710 32085https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/63/821?format=asciiRadiodefaultJ/ApJS/63/821/table1CO Clouds and Hot CoresrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNumCloud numbermeta.idintCore?Hot core designation (noted by letter).meta.id;meta.maincharGLONpGalactic longitude at the position of peak CO emissiondegpos.galactic.lonGLATpGalactic latitude at the position of peak CO emissiondegpos.galactic.latVLSRLSR velocity at the position of peak CO emissionkm/sphys.veloc;pos.lsrintTCOCO temperatures at the position of peak CO emissionKphot.antennaTemp;em.line.CO;stat.maxfloatGLONCentroid galactic longitudedegpos.galactic.lonGLATCentroid galactic latitudedegpos.galactic.latfloatVelCentroid velocitykm/sphys.veloc;pos.lsrfloatTmeanMean temperature for CO emissionKspect.line.intensity;em.line.CO;stat.meanfloatPnumTotal number of (l, b, V) points contained in cloud within 4 K boundarymeta.numberintDistn? Near kinematic distancekpcpos.distancefloatnullableDistf? Far kinematic distancekpcpos.distancefloatnullableRgal? Galactic radiuskpcphys.size.radius;pos.galacticfloatnullableDistZZ distance corresponding to the cloud centroid latitudepcpos.distanceintMelon1Maximum extent of the cloud in longitude, length is expressed in degreesdegphys.angSize;stat.maxfloatMelon2Maximum extent of the cloud in longitude, length is expressed in parsecspcpos.distancefloatMelat1Maximum extent of the cloud in latitude, length is expressed in degreesdegphys.angSize;stat.maxfloatMelat2Maximum extent of the cloud in latitude, length is expressed in parsecspcpos.distancefloatsigmaVelocity dispersion measured for points above the 4 K or 8 K thresholdskm/sphys.veloc.dispersionfloatNotesClouds for which the distance can be resolvedmeta.notechar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)degpos.eq.decnullableindexedJ/ApJS/63/821/table2H II Region CloudsRegionH II regionmeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLumrH II region luminosityJy.kpc**2phys.luminosityfloatGLONp?Galactic longitude at the position of peak CO emissiondegpos.galactic.lonnullableGLATp?Galactic latitude at the position of peak CO emissiondegpos.galactic.latnullableVLSR?LSR velocity at the position of peak CO emissionkm/sphys.veloc;pos.lsrintnullableTCO?CO temperatures at the position of peak CO emissionKphot.antennaTemp;em.line.CO;stat.maxfloatnullableGLON?Centroid galactic longitudedegpos.galactic.lonnullableGLAT?Centroid galactic latitudedegpos.galactic.latfloatnullableVel?Centroid velocitykm/sphys.veloc;pos.lsrintnullableTmean?Mean temperature for CO emissionKspect.line.intensity;em.line.CO;stat.meanfloatnullablePnum?Total number of (l,b,V) pointsmeta.numberintnullableDistn?Near kinematic distancekpcpos.distancefloatnullableDistf?Far kinematic distancekpcpos.distancefloatnullableRgal?Galactic radius obtained from the (l,b,V) centroid of the CO emissionkpcpos.distancefloatnullableMclat1?Mean chord length in galactic latitude expressed in degreesdegstat.fit.dof;pos.galactic.lat;stat.meanfloatnullableMclat2?Mean chord length in galactic latitude expressed in parsecspcpos.distanceintnullableMclon1?Mean chord length in galactic longitude expressed in degreesdegstat.fit.dof;pos.galactic.lon;stat.meanfloatnullableMclon2?Mean chord length in galactic longitude expressed in parsecspcpos.distanceintnullableRoot?Square root of the area of the cloud projected onto the plane of skypcphys.areaintnullableLumCO?CO luminosity (K.km.s^-1^.pc^2^) of the cloudK.km.s**-1.pc**-2phys.luminosity;em.radiointnullablesigma?Velocity dispersion for data above the threshold temperaturekm/sphys.veloc.dispersionfloatnullableThtemp?Threshold temperature defining the cloud boundary in (l,b,V)-spaceKphot.antennaTempfloatnullableNotes?Distance assignmentmeta.notechar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)degpos.eq.decnullableindexed