J/ApJ/910/131ivo://CDS.VizieR/J/ApJ/910/131doi:10.26093/cds/vizier.19100131CDSSu Y.Yang J.Yan Q.-Z.Zhang S.Wang H.Sun Y.Chen Z.Wang C.,Zhou X.Chen X.Jiang Z.Wang M.2022-11-09T06:05:18Z2022-10-14T15:19:12ZCDS support team

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

cds-question@unistra.frmolecular-cloudsco-line-emissiongalaxy-planesmilky-way-galaxygalaxy-kinematicsWe use the ~370deg^2^ data from the MWISP CO survey to study the vertical distribution of the molecular clouds (MCs) toward the tangent points in the region of l=[+16{deg},+52{deg}] and |b|<5.1. We find that the molecular disk consists of two components with a layer thickness (FWHM) of ~85pc and ~280pc, respectively. In the inner Galaxy, the molecular mass in the thin disk is dominant, while the molecular mass traced by the discrete MCs with weak CO emission in the thick disk is probably <~10% of the whole molecular disk. For the CO gas in the thick disk, we identified 1055 high-z MCs that are >~100pc from the Galactic plane. However, only a few samples (i.e., 32 MCs or 3%) are located in the |z|>~360pc region. Typically, the discrete MCs of the thick-disk population have a median peak temperature of 2.1K, a median velocity dispersion of 0.8km/s, and a median effective radius of 2.5pc. Assuming a constant value of X_CO_=2x10^20^cm^-2^(K.km/s)^-1^, the median surface density of these MCs is 6.8M_{sun}_/pc^2^, indicating very faint CO emission for the high-z gas. The cloud-cloud velocity dispersion is 4.9+/-1.3km/s and a linear variation with a slope of ~-0.4km/s/kpc is obtained in the region of R_GC_=2.2-6.4kpc. Assuming that these clouds are supported by their turbulent motions against the gravitational pull of the disk, a model of _{rho}0_(R)=1.28M_{sun}_/pc^3^e^-(R/3.2kpc)^ can be used to describe the distribution of the total mass density in the Galactic midplane.2021ApJ...910..131Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/910/131CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/688/290 : GASS HI survey of the lower halo (Ford+, 2008)J/ApJ/722/367 : HI clouds in Quadrant I of the Milky Way (Ford+, 2010)J/ApJ/723/492 : Physical properties of GRS MCs (Roman-Duval+, 2010)J/AJ/146/150 : Velocity dispersions of 12 nearby gal. (Caldu-Primo+, 2013)J/ApJ/798/L27 : CO obs. of molecular clouds in the 2nd quadrant (Sun+, 2015)J/ApJS/224/7 : CO obs. of the outer arm in the 2nd quadrant (Du+, 2016)J/ApJ/831/124 : Milky Way kinematics. II. (McClure-Griffiths+, 2016)J/ApJ/828/59 : Molecular clouds in the Milky Way with CO obs. (Su+, 2016)J/A+A/601/A124 : Clouds in SEDIGISM science demo. field (Schuller+, 2017)J/ApJS/230/17 : CO obs. of MCs in Extreme Outer Galaxy region (Sun+, 2017)J/ApJS/234/2 : The GALFA-HI survey data release 2 (Peek+, 2018)J/MNRAS/483/4291 : Properties of JCMT CO(3-2) molecular clouds (Colombo+, 2019)J/ApJ/885/131 : ~200 high-mass SFR plx & PM with VLBI (Reid+, 2019)J/A+A/633/A147 : FQS. Galactic Plane CO survey (Benedettini+, 2020)J/ApJS/257/51 : Morph. classif. of MWISP ^12^CO mol. clouds (Yuan+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/910/131https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/910/131http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/910/131https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/910/131https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/910/131http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/910/131GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/910/131/table1 (Parameters of 1055 molecular clouds far from the Galactic Plane based on the Milky Way Imaging Scroll Painting (MWISP) ^12^CO(J=1-0) emission)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/910/131/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/910/131/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/910/131/table1?GETtext/xml+votable180.050000true274.19078-14.507270.0055555555555555565/7379-7381 7555 7560 7582-7583 7601 7649 7660 7666 7674-7675 6/29119 29159 29162-29163 29166 29174 29177-29179 29182 29460 29463 29505-29509 29515 29528 29530-29534 29539-29540 29543 29553 29556-29557 29559 29564 30210 30213 30216-30217 30219 30232 30234-30235 30238-30239 30245-30248 30252-30253 30256-30258 30260-30261 30263-30265 30268 30271 30282-30283 30307-30308 30310 30313-30314 30316-30317 30325-30326 30400-30401 30418-30419 30421-30422 30424-30425 30427-30430 30449 30454 30502 30505-30506 30510-30511 30592-30593 30600 30602-30603 30606-30607 30610-30611 30614-30615 30617 30620-30621 30625 30628-30629 30637 30644 30646-30647 30652-30653 30657-30660 30668 30670-30671 30682-30683 30690 30704-30705 30714-30715 32064-32065 32068-32069 32080https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/910/131?format=asciiRadiodefaultJ/ApJ/910/131/table1Parameters of 1055 molecular clouds far from the Galactic Plane based on the Milky Way Imaging Scroll Painting (MWISP) ^12^CO(J=1-0) emissionVlsr[55.41/146.15] Local Standard of Rest velocitykm/sphys.veloc;pos.lsrfloatSigma[0.35/4.82] One-dimensional velocity dispersion ({sigma}_v_)km/spos.distance;phys.veloc.dispersionfloatTpk[1/12.18] Peak emissionKphot.antennaTemp;em.line.CO;stat.maxfloatArea[1.25/242] Molecular cloud's areaarcmin**2phys.angSizefloatDist[5/7.8] Distance (1)kpcpos.distancefloatZsc[-590.1/606.8] z scale (z=d*tan(b))pcpos.cartesian.z;pos.galacticfloatMass[20/22090] Mass (2)solMassphys.massfloatalpha[1.4/158.1] Virial parameter, {alpha} (3)phys.mass;arith.ratiofloat_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decnullableindexedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/1055] Running sequence numbermeta.id;meta.mainintGLON[16/52] Galactic longitudedegpos.galactic.lonGLAT[-5/4.6] Galactic latitudedegpos.galactic.lat