J/A+A/600/L10ivo://CDS.VizieR/J/A+A/600/L10doi:10.26093/cds/vizier.36009010CDSCsengeri T.Bontemps S.Wyrowski F.Motte F.Menten K.M.Beuther H.,Bronfman L.Commercon B.Chapillon E.Duarte-Cabral A.Fuller G.A.,Henning T.Leurini S.Longmore S.Palau A.Peretto N.Schuller F.,Tan J.C.Testi L.Traficante A.Urquhart J.S.2019-06-03T13:20:06Z2017-04-04T07:48:12ZCDS support team

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

cds-question@unistra.frstellar-associationsmillimeter-astronomysubmillimeter-astronomygalaxy-classification-systemsThe early evolution of massive cluster progenitors is poorly understood. We investigate the fragmentation properties from 0.3pc to 0.06pc scales of a homogenous sample of infrared-quiet massive clumps within 4.5kpc selected from the ATLASGAL survey. Using the ALMA 7m array we detect compact dust continuum emission towards all targets and find that fragmentation, at these scales, is limited. The mass distribution of the fragments uncovers a large fraction of cores above 40M_{sun}_, corresponding to massive dense cores (MDCs) with masses up to ~400M_{sun}_. Seventy-seven percent of the clumps contain at most 3 MDCs per clump, and we also reveal single clumps/MDCs. The most massive cores are formed within the more massive clumps and a high concentration of mass on small scales reveals a high core formation efficiency. The mass of MDCs highly exceeds the local thermal Jeans mass, and we lack the observational evidence of a survey efficiently high level of turbulence or strong enough magnetic fields to keep the most massive MDCs in equilibrium. If already collapsing, the observed fragmentation properties with a high core formation efficiency are consistent with the collapse setting in at parsec scales.2017A&A...600L..10Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/600/L10CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/570/A65 : ATLASGAL massive clumps CO depletion (Giannetti+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/600/L10https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/600/L10http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/600/L10https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/600/L10https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/600/L10http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/600/L10GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/600/L10/tablea1 (Summary of physical properties of the sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/600/L10/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/600/L10/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/600/L10/tablea1?GETtext/xml+votable180.050000true227.46639-58.42730.0055555555555555566/28808 30318-30319 41780 41802 41804 41817 41820 41824 42172 42207 42211-42212 42214 42230 42376 42381 42387 42392 42436 42441 42456-42457 42496-424972.283270615984385e-22 2.283270615984385e-22https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/600/L10?format=asciiMillimeterOpticaldefaultJ/A+A/600/L10/tablea1Summary of physical properties of the samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSourceSource name (LLL.llll+B.bbbb-MMN)meta.id;meta.maincharn_Source[*] Note on Source (1)meta.notecharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainFnuPeak flux at 345GHzJy/beamphot.flux;em.X-rayfloatSnuIntegrated flux density at 345GHzJyphot.flux.density;em.mm.200-400GHzfloatThetaAFWHM major axisarcsecphys.angSizefloatThetaBFWHM minor axisarcsecphys.angSizefloatBeamBeam size as the geometric mean of the beam major and minor axesarcsecphys.angSize;instr.beamfloatFWHMBeam convolved angular source sizearcsecphys.angSize;instr.beamfloatDistDistance from Csengeri et al. (2017, in prep.)kpcpos.distancefloatMcoreCore mass as described in the main textsolMassphys.mass;meta.mainfloatSigmacoreCore surface density as described in the main textg.cm**-2phot.flux.density.sb;meta.mainfloatSimbadSimbad column added by the CDSmeta.ref.urlchar