J/MNRAS/451/3089ivo://CDS.VizieR/J/MNRAS/451/3089doi:10.26093/cds/vizier.74513089CDSTraficante A.Fuller G.A.Peretto N.Pineda J.E.Molinari S.2024-08-15T20:13:49Z2015-06-26T09:28:04ZCDS support team

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

cds-question@unistra.frgalaxiesphotometryinfrared-sourcesprotostarsearly-type-starsWe present a catalogue of starless and protostellar clumps associated with infrared dark clouds (IRDCs) in a 40 degrees wide region of the inner Galactic plane (|b|<=1). We have extracted the far-infrared (FIR) counterparts of 3493 IRDCs with known distance in the Galactic longitude range 15<=l<=55 and searched for the young clumps using Herschel infrared Galactic plane survey, the survey of the Galactic plane carried out with the Herschel satellite. Each clump is identified as a compact source detected at 160, 250 and 350um. The clumps have been classified as protostellar or starless, based on their emission (or lack of emission) at 70um. We identify 1723 clumps, 1056 (61%) of which are protostellar and 667 (39%) starless. These clumps are found within 764 different IRDCs, 375 (49%) of which are only associated with protostellar clumps, 178 (23%) only with starless clumps, and 211 (28%) with both categories of clumps. The clumps have a median mass of ~250M_{sun}_ and range up to >10^4^M_{sun}_ in mass and up to 10^5^L_{sun}_ in luminosity. The mass-radius distribution shows that almost 30% of the starless clumps identified in this survey could form high-mass stars; however these massive clumps are confined in only 4% of the IRDCs. Assuming a minimum mass surface density threshold for the formation of high-mass stars, the comparison of the numbers of massive starless clumps and those already containing embedded sources suggests an upper limit lifetime for the starless phase of ~10^5^yr for clumps with a mass M>500M_{sun}_.2015MNRAS.451.3089Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/451/3089CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/451/3089https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/451/3089http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/451/3089https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/451/3089https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/451/3089http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/451/3089GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/451/3089/clumps (Fitting parameters of the clumps (starless and protostellar))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/451/3089/clumps?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/451/3089/clumps?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/451/3089/clumps?GETtext/xml+votable180.050000true274.391-15.8370.005555555555555556Cone search capability for table J/MNRAS/451/3089/photo (Far-IR photometry of the starless and protostellar clumps)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/451/3089/photo?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/451/3089/photo?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/451/3089/photo?GETtext/xml+votable180.050000true274.3905-15.83670.0055555555555555565/7376-7377 7383 7554 7564 7578-7579 7605 7654 7672-7673 7679 6/12969-12971 14336 29118-29119 29461 29513 29522-29523 29529 29531 30222-30223 30240-30241 30244-30245 30260 30262-30263 30268-30269 30306 30328 30330 30334 30404-30405 30416-30417 30429 30592 30594-30595 30599 30601 30604-30605 30607 30622-30623 30644-30645 30701 30706-30707 30710 30712-30713 30715 32085https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/451/3089?format=asciiOpticalInfrareddefaultJ/MNRAS/451/3089/clumpsFitting parameters of the clumps (starless and protostellar)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNclNumber of clumps in this dark cloudmeta.numberintnullableNameParent IRDC namemeta.id;meta.maincharTypeSimbad column added by the CDSsrc.classcharSeq[1/32] Hyper id. number relative to each cloudmeta.idintNphNumber of photometry points for this clumpmeta.numberintnullableMass[0.1/15558] Clump masssolMassphys.massdoubleLum[0.08/58882] Clump luminositysolLumphys.luminositydoubleRad[0.02/2.61] Clump radius (1)pcphys.size.radiusfloatT[7.7/40] Clump temperatureKphys.temperaturefloate_T[0.3/12.4] Temperature error (2)Kstat.errorfloatchi2[0/10] Reduced {chi}^2^ of the SED fitstat.fit.param;meta.modelledfloatDist[0.1/17] Distance of parent IRDCkpcpos.angDistancefloatRAJ2000Right ascension (J2000.0) of the 160um centroiddegpos.eq.ra;meta.mainDEJ2000Declination (J2000.0) of the 160um centroiddegpos.eq.dec;meta.mainJ/MNRAS/451/3089/photoFar-IR photometry of the starless and protostellar clumpsRAJ2000Right ascension (J2000.0)degpos.eq.ra;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameParent IRDC namemeta.id;meta.maincharTypeSimbad column added by the CDSsrc.classcharSeq[1/32] Hyper id. number relative to each cloudmeta.idintNphNumber of photometry points for this clumpmeta.numberintnullableBand[70/350] Herschel wavelengthuminstr.bandpassintSsurf[-614/388350] Peak flux in MJy/srMJy/srphot.flux.density;em.IRdoubleSpeak[-0.3/94] Peak flux in Jy in BandJyphot.flux.density;em.IRfloatSint[0.003/3727] Integrated flux in BandJyphot.flux.density;em.IRdoublee_Sint[0.032/1607] Error on integrated flux (1)Jystat.errorfloatSbg[0.002/10.7] Background (bg) emissionJyinstr.backgroundfloatSres[0.002/10] Residual emission after background subtraction (2)Jyphot.flux.density;em.IRfloatP[1/4] Polynomial order for bg estimation (3)stat.fit.paramintfw.min[18/37] Minor axis of the clump (4)arcsecphys.angSize;srcfloatfw.max[18/37] Major axis of the clump (4)arcsecphys.angSizefloatPA[0/270] Position angledegpos.posAngfloatFit[-2/0] Fit convergence status, 0=ok (5)meta.code.qual;stat.fit.param;meta.modelledintDEJ2000Declination (J2000.0)degpos.eq.dec;meta.mainDist[0/14] Distance from the reference centroid (source position at 160{mu}m)arcsecpos.angDistancefloatNd[0/6] Number of deblended sourcesmeta.numberintNc[1/6] Number of clustered sourcesmeta.numberint