J/ApJ/846/144ivo://CDS.VizieR/J/ApJ/846/144doi:10.26093/cds/vizier.18460144CDSKirk H.Friesen R.K.Pineda J.E.Rosolowsky E.Offner S.S.R.,Matzner C.D.Myers P.C.Di Francesco J.Caselli P.Alves F.O.,Chacon-Tanarro A.Chen H.-H.Chen M.C.-Y.Keown J.Punanova A.,Seo Y.M.Shirley Y.Ginsburg A.Hall C.Singh A.Arce H.G.,Goodman A.A.Martin P.Redaelli E.2021-09-07T07:13:25Z2018-06-15T13:09:12ZCDS support team

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

cds-question@unistra.frmolecular-cloudsmillimeter-astronomysubmillimeter-astronomygalaxy-kinematicsyoung-stellar-objectsinterstellar-mediumWe use data on gas temperature and velocity dispersion from the Green Bank Ammonia Survey and core masses and sizes from the James Clerk Maxwell Telescope Gould Belt Survey to estimate the virial states of dense cores within the Orion A molecular cloud. Surprisingly, we find that almost none of the dense cores are sufficiently massive to be bound when considering only the balance between self-gravity and the thermal and non-thermal motions present in the dense gas. Including the additional pressure binding imposed by the weight of the ambient molecular cloud material and additional smaller pressure terms, however, suggests that most of the dense cores are pressure-confined.2017ApJ...846..144Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/846/144CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/jcmt : Jame Clerk Maxwell Telescope Science Archive (CADC, 2003)J/A+A/291/943 : Protostellar cores (Ossenkopf+, 1994)J/AJ/113/1733 : Orion Nebula Cluster population (Hillenbrand 1997)J/ApJS/125/161 : A database of dense cores mapped in ammonia (Jijina+, 1999)J/ApJ/559/307 : Sub-mm mapping in Orion B molecular cloud (Johnstone+, 2001)J/ApJ/646/1009 : Structures of dust in Perseus molecular cloud (Kirk+, 2006)J/A+A/462/L17 : Dense cores in interstellar molecular clouds (Alves+, 2007)J/ApJ/665/1194 : Dense cores in the Orion A cloud survey (Ikeda+, 2007)J/ApJ/668/1042 : Dense cores in Perseus molecular cloud (Kirk+, 2007)J/ApJ/655/351 : Massive quiescent cores in Orion. II. (Li+, 2007)J/MNRAS/374/1413 : SCUBA survey of Orion (Nutter+, 2007)J/ApJ/664/928 : Starless cores in HCN(J=1-0) (Sohn+ 2007)J/ApJ/680/495 : Interstellar clouds in the Gould belt (Harvey+, 2008)J/A+A/487/993 : MAMBO Mapping of c2d Clouds and Cores (Kauffmann+, 2008)J/ApJS/181/321 : Properties of Spitzer c2d dark clouds (Evans+, 2009)J/ApJ/696/298 : Dense cores in Perseus (Foster+, 2009)J/A+A/498/167 : Embedded sources in L 1688 (van Kempen+, 2009)J/ApJ/710/1247 : Dense cores in Gould Belt clouds (Sadavoy+, 2010)J/AJ/144/192 : Spitzer survey of Orion A & B. I. YSOs (Megeath+, 2012)J/ApJ/767/36 : APEX observations of HOPS protostars (Stutz+, 2013)J/A+A/566/A45 : Orion optical-depth & column-density maps (Lombardi+, 2014)J/A+A/564/A68 : Orion A GMC 13CO and C18O maps (Shimajiri+, 2014)J/MNRAS/449/1769 : Orion A North prestellar core properties (Salji+, 2015)J/A+A/574/A104 : Dense cores in L1495/B213 complex (Tafalla+, 2015)J/ApJ/831/67 : Galactic CHaMP. III. ^12^CO dense clumps (Barnes+, 2016)J/ApJ/817/167 : JCMT Gould Belt Survey: dense cores in Orion B (Kirk+, 2016)J/MNRAS/461/4022 : JCMT Gould Belt Survey: Southern Orion A (Mairs+, 2016)J/A+A/587/A153 : VISION I. VISTA Orion A Survey (Meingast+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/846/144https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/846/144http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/846/144https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/846/144https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/846/144http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/846/144GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/846/144/table1 (Dense core properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/846/144/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/846/144/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/846/144/table1?GETtext/xml+votable180.050000true83.84726-5.024590.0055555555555555566/21436 21438 21439 22805https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/846/144?format=asciiMillimeterdefaultJ/ApJ/846/144/table1Dense core propertiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[5/907] Sequential Core ID (1)meta.id;meta.mainintRAJ2000[83.64/84.17] Right Ascension, core's central position (J2000)degpos.eq.ra;meta.mainDEJ2000[-6.3/-4.8] Declination, core's central position (J2000)degpos.eq.dec;meta.mainMass[0.09/11.1] Core mass (2)solMassphys.massfloatReff[0.01/0.2] Effective radius (3)pcphys.size.radiusfloatConc[0.3/0.8] Concentration (4)meta.notefloatYSO?[YN?] Core has an associated protostar?meta.codecharsigma[0.1/1.2] Mean velocity dispersion (5)km/sphys.veloc.dispersion;stat.meanfloate_sigma[0/0.08] Formal error in sigma-obskm/sstat.errorfloats_sigma[0.005/0.3] Weighted standard deviation of sigmakm/sstat.stdev;phys.velocfloatTkin[11.3/29.3] Mean kinetic temperature (5)Kphys.temperature;stat.meanfloate_Tkin[0/6] Formal error in TkinKstat.errorfloats_Tkin[0/7.1] Weighted standard deviation of TkinKstat.stdev;phys.temperaturefloatlog(Pc)[6.5/7.5] Estimated pressure, log (Pc/kB)log(K.cm**-3)phys.pressurefloatVir[0.1/75] Virial ratio, -({Omega}G+{Omega}P/c)/2{Omega}Kstat.fit.omcdoubleG/K[0.004/2.6] Gravitational vs thermal pressure, -{Omega}G/{Omega}Kstat.fit.omcdoubleG/Pc[/20] Core confinement ratio, {Omega}G/{Omega}P,cstat.fit.omcdoubleSimbadSimbad column added by the CDSmeta.ref.urlchar