J/A+A/655/A12ivo://CDS.VizieR/J/A+A/655/A12doi:10.26093/cds/vizier.36550012CDSTang X.D.Henkel C.Menten K.M.Gong Y.Chen C.-H.R.Li D.L.,Lee M.-Y.Mangum J.G.Ao Y.P.Muehle S.Aalto S.Garcia-Burillo S.,Martin S.Viti S.Muller S.Costagliola F.Asiri H.Levshakov S.A.,Spaans M.Ott J.Impellizzeri C.M.V.Fukui Y.He Y.X.Esimbek J.,Zhou J.J.Zheng X.W.Zhao X.Li J.S.2022-03-07T07:15:12Z2021-10-28T08:09:38ZCDS support team

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

cds-question@unistra.frmagellanic-cloudsstar-forming-regionsradio-astronomyWe mapped the kinetic temperature structure of two massive star-forming regions, N113 and N159W, in the Large Magellanic Cloud (LMC). We have used ~1.6" (~0.4pc) resolution measurements of the para-H_2_CO J_KaKc_=3_03_-2_02_, 3_22_-2_21_, and 3_21_-2_20_ transitions near 218.5GHz to constrain RADEX non local thermodynamic equilibrium models of the physical conditions. The gas kinetic temperatures derived from the para-H_2_CO line ratios 3_22_-2_21_/3_03_-2_02_ and 3_21_-2_20_/3_03_-2_02_ range from 28 to 105K in N113 and 29 to 68K in N159W. Distributions of the dense gas traced by para-H_2_CO agree with those of the 1.3mm dust and Spitzer 8.0um emission, but they do not significantly correlate with the H emission. The high kinetic temperatures (T_kin_>~50K) of the dense gas traced by para-H_2_CO appear to be correlated with the embedded infrared sources inside the clouds and/or young stellar objects in the N113 and N159W regions. The lower temperatures (T_kin_<50K) were measured at the outskirts of the H_2_CO-bearing distributions of both N113 and N159W. It seems that the kinetic temperatures of the dense gas traced by para-H_2_CO are weakly affected by the external sources of the H{alpha} emission. The non thermal velocity dispersions of para-H_2_CO are well correlated with the gas kinetic temperatures in the N113 region, implying that the higher kinetic temperature traced by para-H_2_CO is related to turbulence on a ~0.4pc scale. The dense gas heating appears to be dominated by internal star formation activity, radiation, and/or turbulence. It seems that the mechanism heating the dense gas of the star-forming regions in the LMC is consistent with that in Galactic massive star-forming regions located in the Galactic plane.2021A&A...655A..12Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/655/A12CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/598/A30 : Massive star forming molecular clumps Tkin (Tang+, 2017)J/A+A/600/A16 : Six LMC star forming region spectra (Tang+, 2017)J/A+A/609/A16 : OMC 1 reduced H_2_CO(3-2) datacubes (Tang+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/655/A12https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/655/A12http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/655/A12https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/655/A12https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/655/A12http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/655/A12GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/655/A12/list (List of fits datacubes)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/655/A12/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/655/A12/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/655/A12/list?GETtext/xml+votable180.050000true78.32581-69.373640.0055555555555555566/33091 33098https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/655/A12?format=asciiRadiodefaultJ/A+A/655/A12/listList of fits datacubesNyNumber of pixels along Y-axismeta.numberintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension of center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainNxNumber of pixels along X-axismeta.numberintNzNumber of slicesmeta.numberintbFreqLower value of frequency intervalGHzem.freq;stat.minfloatBFreqUpper value of frequency intervalGHzem.freq;stat.maxfloatdFreqFrequency resolutionHzspect.resolutionintsizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fits