J/ApJ/878/44ivo://CDS.VizieR/J/ApJ/878/44doi:10.26093/cds/vizier.18780044CDSMa Y.Wang H.Zhang M.Li C.Yang J.2021-10-13T12:22:33Z2020-12-21T10:36:48ZCDS support team

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

cds-question@unistra.frsupernova-remnantsmolecular-cloudsinterstellar-mediumco-line-emissionsurveysWe have conducted a large-field simultaneous survey of ^12^CO, ^13^CO, and C^18^O J=1-0 emission toward the Cassiopeia A (Cas A) supernova remnant (SNR), which covers a sky area of 3.5{deg}x3.1{deg}. The Cas giant molecular cloud (GMC) mainly consists of three individual clouds with masses on the order of 10^4^-10^5^M_{sun}_. The total mass derived from the ^13^CO emission of the GMC is 2.1x10^5^M_{sun}_ and is 9.5x10^5^M_{sun}_ from the ^12^CO emission. Two regions with broadened (6-7km/s) or asymmetric ^12^CO line profiles are found in the vicinity (within a 10'x10' region) of the Cas A SNR, indicating possible interactions between the SNR and the GMC. Using the GAUSSCLUMPS algorithm, 547 ^13^CO clumps are identified in the GMC, 54% of which are supercritical (i.e., {alpha}_vir_<2). The mass spectrum of the molecular clumps follows a power-law distribution with an exponent of -2.20. The pixel-by-pixel column density of the GMC can be fitted with a log-normal probability distribution function (N-PDF). The median column density of molecular hydrogen in the GMC is 1.6x10^21^cm^-2^ and half the mass of the GMC is contained in regions with H_2_ column density lower than 3x10^21^cm^-2^, which is well below the threshold of star formation. The distribution of the YSO candidates in the region shows no agglomeration.2019ApJ...878...44Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/878/44CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/278 : A Catalogue of Galactic Supernova Remnants (Green 2017)J/ApJ/428/693 : Rosette Nebula & Maddalena structures (Williams+ 1994)J/A+A/368/267 : Spatially resolved spectroscopy of Cas A (Maccarone+, 2001)J/ApJ/551/852 : FCRAO CO survey of the outer Galaxy (Heyer+, 2001)J/ApJ/613/343 : Cas A knot and filament proper motions (Delaney+, 2004)J/ApJS/179/195 : A catalog of outer ejecta knots in Cas A (Hammell+, 2008)J/ApJ/699/1092 : Giant molecular clouds (SRBY) (Heyer+, 2009)J/MNRAS/431/1752 : ATLASGAL 6.7GHz methanol masers (Urquhart+, 2013)J/ApJS/212/1 : The WISE catalog of Galactic HII regions (Anderson+, 2014)J/ApJ/783/130 : Parallaxes of high mass star forming regions (Reid+, 2014)J/ApJS/217/2 : Refined associations of Fermi/LAT sources (Massaro+, 2015)J/A+A/588/A104 : Molecular clouds and star formation (Gong+, 2016)J/ApJ/837/118 : NIR knots in the Cas A supernova remnant (Lee+, 2017)J/ApJ/866/139 : Knots in the deep [FeII]+[SiI] image of Cas A (Koo+, 2018)J/A+A/612/A110 : Cas A LOFAR and VLA images (Arias+, 2018)http://www.radioast.nsdc.cn/mwisp.php : MWISP home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/878/44https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/878/44http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/878/44https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/878/44https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/878/44http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/878/44GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/878/44/table2 (Properties of ^13^CO clumps)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/878/44/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/878/44/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/878/44/table2?GETtext/xml+votable180.050000true346.8411258.709120.0055555555555555565/3571 6/14190 14202 14277-14279 14283 14288 14290 14296 14305 14308https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/878/44?format=asciiRadiodefaultJ/ApJ/878/44/table2Properties of ^13^CO clumpsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMWISPMWISP project source identifier (GLLL.lll-BB.bbb-NNN.NN; with NNN.NN=Vlsr; <MWISP GLLL.lll-BB.bbb> in Simbad)meta.id;meta.maincharGLON[109.7/113.2] Galactic Longitude, centroiddegpos.galactic.lonGLAT[-4.21/-1.18] Galactic Latitude, centroiddegpos.galactic.latamaj[50/324] FWHM of the major axisarcsecphys.angSizeintbmin[56/326] FWHM of the minor axisarcsecphys.angSizeintPA[-74/178] Position Angledegpos.posAngintVlsr[-57/-27] Local Standard of Rest velocitykm/sphys.veloc;pos.lsrfloatTpeak[1.5/7.3] Peak intensity of 13CO emissionKphot.flux;spect.linefloatDeltaV[0.4/4.2] FWHM line widthkm/sspect.line.widthfloatRad[0.5/2] Effective Radiuspcphys.size.radiusfloatTex[6.5/18.8] Excitation temperatureKphys.atmol.excitationfloatTau[0.2/1.1] Optical depthphys.absorption.opticalDepthfloatNH2[5.5e+20/1.5e+22] Peak column densitycm**-2phys.columnDensity;stat.maxfloatMLTE[23/2800] LTE masssolMassphys.massfloatSigma[29/750] Mass surface densitysolMass.pc**-2phys.densityfloatn[420/14000] Number densitycm**-3meta.number;phys.densityfloataVir[0.26/6.2] Virial parameter {alpha}_vir_phys.mass;arith.ratiofloatSimbadSimbad column added by the CDSmeta.ref.urlchar_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.decnullableindexed