J/ApJ/854/154ivo://CDS.VizieR/J/ApJ/854/154doi:10.26093/cds/vizier.18540154CDSNayak O.Meixner M.Fukui Y.Tachihara K.Onishi T.Saigo K.,Tokuda K.Harada R.2019-01-22T13:36:50Z2019-01-02T11:40:51ZCDS support team

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

cds-question@unistra.frmagellanic-cloudsmolecular-cloudsco-line-emissionThe N159 star-forming region is one of the most massive giant molecular clouds (GMCs) in the Large Magellanic Cloud (LMC). We show the ^12^CO, ^13^CO, CS molecular gas lines observed with ALMA in N159 west (N159W) and N159 east (N159E). We relate the structure of the gas clumps to the properties of 24 massive young stellar objects (YSOs) that include 10 newly identified YSOs based on our search. We use dendrogram analysis to identify properties of the molecular clumps, such as flux, mass, linewidth, size, and virial parameter. We relate the YSO properties to the molecular gas properties. We find that the CS gas clumps have a steeper size-linewidth relation than the ^12^CO or ^13^CO gas clumps. This larger slope could potentially occur if the CS gas is tracing shocks. The virial parameters of the ^13^CO gas clumps in N159W and N159E are low (<1). The threshold for massive star formation in N159W is 501M_{sun}_/pc^2^, and the threshold for massive star formation in N159E is 794M_{sun}_/pc^2^. We find that ^13^CO is more photodissociated in N159E than N159W. The most massive YSO in N159E has cleared out a molecular gas hole in its vicinity. All the massive YSO candidates in N159E have a more evolved spectral energy distribution type in comparison to the YSO candidates in N159W. These differences lead us to conclude that the giant molecular cloud complex in N159E is more evolved than the giant molecular cloud complex in N159W.2018ApJ...854..154Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/854/154CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/288 : IRSF Magellanic Clouds Point Source Catalog (Kato+ 2007)VII/232 : Nebulae in the Magellanic Clouds (Davies+ 1976)VI/102 : Geneva stellar evolution tracks and isochrones (Lejeune+, 2001)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)J/A+A/347/841 : HST Observations of SMC N88A (Heydari-Malayeri+, 1999)J/A+A/422/129 : JHKs photometry in N159 (LMC) (Meynadier+, 2004)J/ApJ/638/293 : 1.1mm sources in the Perseus Molecular Cloud (Enoch+, 2006)J/AJ/132/2268 : SAGE calibration stars (Meixner+, 2006)J/A+A/453/517 : JKs photometry of N159A (Testor+, 2006)J/ApJ/686/948 : CO in extragalactic giant molecular clouds (Bolatto+, 2008)J/ApJS/178/56 : CO observations of LMC Giant Molecular clouds (Fukui+, 2008)J/AJ/136/18 : LMC SAGE. New candidate YSOs (Whitney+, 2008)J/ApJS/184/172 : High- and intermediate-mass YSOs in the LMC (Gruendl+, 2009)J/ApJ/699/1092 : Giant molecular clouds (SRBY) (Heyer+, 2009)J/ApJS/184/1 : Molecular clouds in the LMC by NANTEN. II. (Kawamura+, 2009)J/ApJ/699/150 : Spectral classifications of Massive YSOs in LMC (Seale+, 2009)J/A+A/530/A118 : G29.96-0.02 and G35.20-1.74 1mm and 3mm maps (Pillai+, 2011)J/ApJS/197/16 : CO observations of LMC molecular clouds (MAGMA). (Wong+, 2011)J/A+A/544/A146 : ATLASGAL cold high-mass clumps with NH_3_ (Wienen+, 2012)J/ApJ/774/73 : ALMA CO observations of 30 Dor (Indebetouw+, 2013)J/AJ/146/62 : HERschel HERITAGE in Magellanic Clouds (Meixner+, 2013)J/AJ/148/124 : Herschel key program Heritage (Seale+, 2014)J/ApJ/811/145 : LMC & SMC evolved stars detected with Herschel (Jones+, 2015)J/MNRAS/459/342 : Dense cores in Taurus L1495 cloud (Marsh+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/854/154https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/854/154http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/854/154https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/854/154https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/854/154http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/854/154GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/854/154/table9 (Mass derived from N159W ^12^CO (2-1) clumps)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/854/154/table9?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/854/154/table9?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/854/154/table9?GETtext/xml+votable180.050000true84.899215-69.762008060.005555555555555556Cone search capability for table J/ApJ/854/154/table10 (Column densities and mass derived from N159W ^13^CO (2-1) clumps)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/854/154/table10?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/854/154/table10?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/854/154/table10?GETtext/xml+votable180.050000true84.90480694-69.769413890.0055555555555555566/33091 33094https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/854/154?format=asciiRadiodefaultJ/ApJ/854/154/table9Mass derived from N159W ^12^CO (2-1) clumpsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRegRegion, N159E or N159Wmeta.id.parentcharClump[0/237] Clump IDmeta.id;meta.mainintRAJ2000[84.8/85.1] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-69.8/-69.7] Declination (J2000)degpos.eq.dec;meta.mainRad[0.1/7.3] Effective Radius from the clump areapcphys.size.radiusfloatF12CO[3.9/149] ^12^CO (2-1) line fluxK.km/sphot.flux;em.line.COfloate_F12CO[0.7/45] Uncertainty in F12COK.km/sstat.errorfloatMtot[6.7/176000] Total H2 Mass (1)solMassphys.massdoublee_Mtot[0.8/121000] Uncertainty in MtotsolMassstat.errordoubleMvir[0.05/108000] Virial Mass, assuming virial param=1solMassphys.massdoublee_Mvir[0.02/74600] Mvir uncertaintysolMassstat.errordoubleLW[0.01/3.6] Measured linewidthkm/sspect.line.widthfloatJ/ApJ/854/154/table10Column densities and mass derived from N159W ^13^CO (2-1) clumpsRegRegion, N159E or N159Wmeta.id.parentcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClump[0/889] Clump IDmeta.id;meta.mainintRAJ2000[84.8/85.1] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-69.8/-69.7] Declination (J2000)degpos.eq.dec;meta.mainRad[0.1/2.7] Effective Radius from the clump areapcphys.size.radiusfloatN13CO[1.3e+15/7.8e+16] ^13^CO (2-1) number column densitycm**-2phys.columnDensitydoubleMtot[3.9/43000] Total H2 Mass (1)solMassphys.massdoublee_Mtot[1.3/22600] Uncertainty in TotMasssolMassstat.errordoubleMvir[0.04/15800] Virial Mass, assuming virial param=1solMassphys.massdoublee_Mvir[0.01/8280] Mvir uncertaintysolMassstat.errordoubleLW[0.01/2.3] Measured linewidthkm/sspect.line.widthfloat