J/A+A/561/A148ivo://CDS.VizieR/J/A+A/561/A148doi:10.26093/cds/vizier.35610148CDSGomez L.Wyrowski F.Shculler F.Menten K.M.Ballesteros-Paredes J.2014-07-06T06:37:27Z2014-01-28T07:49:04ZCDS support team

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

cds-question@unistra.frinfrared-sourcesmolecular-cloudsmillimeter-astronomysubmillimeter-astronomyWe present an analysis of the dust continuum emission at 870um in order to investigate the mass distribution of clumps within infrared dark clouds (IRDCs). We map six IRDCs with the Large APEX BOlometer CAmera (LABOCA) at APEX, reaching an rms noise level of 28-44mJy/beam. The dust continuum emission coming from these IRDCs was decomposed by using two automated algorithms, Gaussclumps and Clumpfind. We identify 510 and 352 sources with Gaussclumps and Clumpfind, respectively, and estimate masses and other physical properties assuming a uniform dust temperature. The mass ranges are 6-2692M_{sun}_(Gaussclumps) and 7-4254M_{sun} (Clumpfind) and the ranges in effective radius are around 0.10-0.74pc (Gaussclumps) and 0.16-0.99pc (Clumpfind). The mass distribution, independent of the decomposition method used, is fitted by a power law, dN/dM{prop.to}M^alpha^, with an index (alpha) of -1.60+/-0.06.2014A&A...561A.148Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/561/A148CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/641/389 : Millimetric observations of IRDC cores (Rathborne+, 2006)J/ApJ/680/349 : Galactic distribution of IRDCs (Jackson+, 2008)J/ApJ/686/384 : ^12^CO, ^13^CO, C^18^O survey of IRDCs (Du+, 2008)J/ApJ/698/324 : Spitzer IRDCs (Ragan+, 2009)J/MNRAS/399/1506 : IRDC cores in SCUBA Legacy Catalogue (Parsons+, 2009)J/ApJ/715/310 : Early stages of star formation in IRDCs (Rathborne+, 2010)J/MNRAS/422/1071 : Cores in IR Dark Clouds for 300<=l<=330 (Wilcock+, 2012)J/A+A/552/A40 : MSX high-contrast IRDCs with NH_3_ (Chira+, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/561/A148https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/561/A148http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/561/A148https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/561/A148https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/561/A148http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/561/A148GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/561/A148/table3 (Sources found with Gaussclumps algorithm)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/561/A148/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/561/A148/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/561/A148/table3?GETtext/xml+votable180.050000true240.132083-53.210.005555555555555556Cone search capability for table J/A+A/561/A148/table4 (Sources found with Clumpfind algorithm)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/561/A148/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/561/A148/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/561/A148/table4?GETtext/xml+votable180.050000true240.13-53.1930560.0055555555555555566/42159 42170 42210-42211 42213 42215 42390 42392 42396 42496-424972.283270615984385e-22 2.283270615984385e-22https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/561/A148?format=asciiInfraredRadiodefaultJ/A+A/561/A148/table3Sources found with Gaussclumps algorithmrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRegionRegion (infra-red dark cloud) name (G1)meta.id.parentcharN[1/123] Running number within the regionmeta.id;obs.fieldintRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainIpeakPeak intensity at 870um (345GHz) (in Jy/beam)Jyphot.flux.density;em.mm.200-400GHzfloatSFlux density at 870um (345GHz)Jyphot.flux.density;em.mm.200-400GHzfloatamajAngular FWHM along the major axisarcsecphys.angSizefloataminAngular FWHM along the minor axisarcsecphys.angSizefloatdmajDeconvolved FWHM along the major axispcpos.distancefloatdminDeconvolved FWHM along the minor axispcpos.distancefloatPA[-180/180] Position angledegpos.posAngintReffDeconvolved effective radiuspcphys.size.radiusfloatMassTotal masssolMassphys.massintNH2Beam averaged H_2_ column densitycm**-2phys.columnDensity;instr.beamdoublenH2H_2_ volume densitycm**-3phys.densitydoubleJ/A+A/561/A148/table4Sources found with Clumpfind algorithmrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRegionRegion (infra-red dark cloud) name (G1)meta.id.parentcharN[1/84] Running number within the regionmeta.id;obs.fieldintRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainIpeakPeak intensity at 870um (345GHz) (in Jy/beam)Jyphot.flux.density;em.mm.200-400GHzfloatSFlux density at 870um (345GHz)Jyphot.flux.density;em.mm.200-400GHzfloatReffDeconvolved effective radiuspcphys.size.radiusfloatMassTotal masssolMassphys.massintNH2Beam averaged H_2_ column densitycm**-2phys.columnDensity;instr.beamdoublenH2H_2_ volume densitycm**-3phys.densitydouble