J/ApJ/899/158ivo://CDS.VizieR/J/ApJ/899/158doi:10.26093/cds/vizier.18990158CDSKrieger N.Bolatto A.D.Koch E.W.Leroy A.K.Rosolowsky E.Walter F.,Weiss A.Eden D.J.Levy R.C.Meier D.S.Mills E.A.C.Moore T.Ott J.,Su Y.Veilleux S.2022-03-14T07:10:20Z2021-11-08T06:29:19ZCDS support team

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

cds-question@unistra.frinterstellar-mediummolecular-cloudsmilky-way-galaxygalactic-centergalaxiesradio-spectroscopyWe compare molecular gas properties in the starbursting center of NGC253 and the Milky Way Galactic center (GC) on scales of ~1-100pc using dendrograms and resolution-, area-, and noise-matched data sets in CO(1-0) and CO(3-2). We find that the size-line width relations in NGC253 and the GC have similar slope, but NGC253 has larger line widths by factors of ~2-3. The {sigma}2/R dependency on column density shows that, in the GC, on scales of 10-100pc the kinematics of gas over N>3x1021/cm^2^ are compatible with gravitationally bound structures. In NGC253 this is only the case for column densities N>3x1022/cm^2^. The increased line widths in NGC253 originate in the lower column density gas. This high velocity dispersion, not gravitationally self-bound gas, is likely in transient structures created by the combination of high average densities and feedback in the starburst. The high densities turn the gas molecular throughout the volume of the starburst, and the injection of energy and momentum by feedback significantly increases the velocity dispersion at a given spatial scale over what is observed in the GC.2020ApJ...899..158Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/899/158CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJ/551/852 : FCRAO CO survey of the outer Galaxy (Heyer+, 2001)J/ApJ/699/1092 : Giant molecular clouds (SRBY) (Heyer+, 2009)J/AJ/142/35 : The VLBA Galactic Plane Survey (VGaPS) (Petrov+, 2011)J/A+A/555/L4 : Inner rings in disc galaxies from UV + H{alpha} (Comeron, 2013)J/ApJ/784/3 : The PAWS catalogs of GMCs and islands in M51 (Colombo+, 2014)J/A+A/586/A50 : Central Molecular Zone H2CO temperature maps (Ginsburg+, 2016)J/MNRAS/471/4027 : CVRHS classifications for the GZ2 Ring Sample (Buta, 2017)J/AJ/156/18 : APOGEE DR14:Binary comp. of evolved stars (Price-Whelan+, 2018)J/ApJ/857/19 : ALMA view of GMCs in NGC 300 (Faesi+, 2018)J/ApJ/860/172 : Cloud-scale molecular gas properties in 15 galaxies (Sun+,2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/899/158https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/899/158http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/899/158https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/899/158https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/899/158http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/899/158GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapMillimeterdefaultJ/ApJ/899/158/fig1Binned Size-Linewidth relation or CO(3-2) and CO(1-0)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGalaxySource identifier; Galactic Center or NGC253meta.id;meta.maincharCOCO transition; (1-0) or (3-2)phys.atmol.levelcharRmin[0.49/60.7] Lower edge of R binpcstat.fit.paramfloatRmax[0.62/76.4] Upper edge of R binpcstat.fit.paramfloatb_sigma[1/41.8] Lower 16th percentile bound in sigmakm/sstat.stdev;stat.minfloatsigma[1.56/47.8] Median sigma distrib. 50th percentilekm/sphys.velocfloatB_sigma[3.08/53.7] Upper 84th percentile bound in sigmakm/sstat.stdev;stat.maxfloatJ/ApJ/899/158/fig2Relation between dendrogram structure size and luminosity for CO(3-2) and CO(1-0)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGalaxySource identifier; Galactic Center or NGC253meta.id;meta.maincharCOCO transition; (1-0) or (3-2)phys.atmol.levelcharRmin[0.49/60.7] Lower edge of R binpcstat.fit.paramfloatRmax[0.62/76.4] Upper edge of R binpcstat.fit.paramfloatb_LumLower 16th percentile bound in LumK.km.s**-1.pc**-2phys.luminosity;stat.mindoubleLumMedian of luminosity distribution; 50th percentileK.km.s**-1.pc**-2phys.luminositydoubleB_LumUpper 84th percentile bound in LumK.km.s**-1.pc**-2phys.luminosity;stat.maxdoubleJ/ApJ/899/158/fig3Size-line width coefficient as a function of column densityrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGalaxySource identifier; Galactic Center or NGC253meta.id;meta.maincharCOCO transition; (1-0) or (3-2)phys.atmol.levelcharNminLower edge of N bincm**-2meta.numberdoubleNmaxUpper edge of N bincm**-2meta.numberdoubleb_sigma2RLower 16th percentile bound in sigma2/Rkm**2.s**-2.pc**-1stat.fit.param;stat.minfloatsigma2RMedian of {sigma}^2^/R distribution; 50th percentilekm**2.s**-2.pc**-1stat.fit.paramfloatB_sigma2RUpper 84th percentile bound in sigma2/Rkm**2.s**-2.pc**-1stat.fit.param;stat.maxfloat