J/A+A/481/345ivo://CDS.VizieR/J/A+A/481/345doi:10.26093/cds/vizier.34810345CDSMolinari S.Pezzuto S.Cesaroni R.Brand J.Faustini F.Testi L.2017-10-09T13:34:26Z2008-08-09T15:05:12ZCDS support team

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

cds-question@unistra.frstellar-associationsinfrared-sourcesspectral-energy-distributionThe mechanism of formation of massive stars is still a matter of debate. It is not yet clear if it can be considered to be a scaled-up analogue of the low-mass star regime, or if there are additional agents like merging of lower-mass forming objects or accretion from initially unbound material. Most of the uncertainties come from the lack of diagnostic tools to evolutionarily classify large samples of candidate massive protostellar objects that can then be studied in more detail. We want to verify whether diagnostic tools like the SED shape and the relationship between envelope mass and bolometric luminosity can be extended to the study of high-mass star formation. The 8-1200um SED of YSOs in 42 regions of massive star formation has been reconstructed using MSX, IRAS, and submm data partly available from previous works. Apart from IRAS catalogue fluxes, the fluxes in the Mid-IR and sub-mm/mm were derived directly from the images. The SEDs were fitted to an extensive grid of envelope models with embedded ZAMS stars, available from the literature. Sources that could not be fitted with a single model were then fitted with a two-component model composed of an embedded ZAMS for the mid-IR part and a single-temperature optically thin greybody for the longer wavelength emitting component. Sources were classified as "IR" if they were fitted with an embedded ZAMS envelope, and "MM" if they could only be fitted with a greybody with a peak at high {lambda} further subclassification was based on being the most massive object in the field ("P", for primary) or not ("S", for secondary).2008A&A...481..345Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/481/345CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/308/573 : Ammonia on YSOs IRAS sources (Molinari+ 1996)J/A+A/432/921 : Massive protostellar candidates (Fontani+, 2005)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/481/345https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/481/345http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/481/345https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/481/345https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/481/345http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/481/345GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/481/345/table1 (List of sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/481/345/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/481/345/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/481/345/table1?GETtext/xml+votable180.050000true79.30541739.3705560.005555555555555556Cone search capability for table J/A+A/481/345/table2 (Sub-mm and mm fluxes)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/481/345/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/481/345/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/481/345/table2?GETtext/xml+votable180.050000true79.308339.37250.005555555555555556Cone search capability for table J/A+A/481/345/table3 (Mid-IR MSX fluxes)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/481/345/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/481/345/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/481/345/table3?GETtext/xml+votable180.050000true79.309739.37280.005555555555555556Cone search capability for table J/A+A/481/345/table4 (Mid-IR ISOCAM fluxes)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/481/345/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/481/345/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/481/345/table4?GETtext/xml+votable180.050000true283.40811.84020.0055555555555555566/1340 14255 14267 14299 14314 14629-14630 15430 15624 24189 24499 28825 28919 29112 29528-29529 30405 30616 37244 37343 37361 37369 37846 37852 37872 37887 37894 38032 39248 39251 39273 41683 41686 41781 41813 41815 42172 42174 42216 42381-42382 42389 42496 43017-43019https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/481/345?format=asciiInfrareddefaultJ/A+A/481/345/table1List of sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIRASIRAS fieldobs.fieldcharprimaryRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.main[25-12]IRAS [25-12] colour indexmagphot.color;em.IR.8-15um;em.IR.15-30umfloatn_[25-12][*] * for high sources (else low sources, i.e. [25-12]<0.57)meta.notecharDkinKinematical distance, or lower limit of kinematical distance when intervalkpcpos.distance;pos.heliocentricfloatDkinu? Upper limit of kinematical distancekpcpos.distance;pos.heliocentricfloatnullableSimbadSimbad column added by the CDScharJ/A+A/481/345/table2Sub-mm and mm fluxesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIRASIRAS fieldobs.fieldcharMM[1/8] mm peak number (1)meta.id;meta.mainintoRAOffset in RA mm peak (G1)arcsecpos.eq.ra;arith.diffintoDEOffset in DE mm peak (G1)arcsecpos.eq.dec;arith.diffintF450um? Flux at 450umJyphot.flux.density;em.mm.400-750GHzfloatnullableF850um? Flux at 850umJyphot.flux.density;em.mm.200-400GHzfloatnullablen_F850um[b] b: Blended with MM1@850ummeta.notecharF1.2mm? Flux at 1200umJyphot.flux.density;em.mm.200-400GHzfloatnullablen_F1.2mm[a] a : Obtained at IRAM-30m (HPBW~10")meta.notechar_RAPosition (computed from IRAS name with position offsets) (right ascension part)degpos.eq.ra;meta.main_DEPosition (computed from IRAS name with position offsets) (declination part)degpos.eq.dec;meta.mainJ/A+A/481/345/table3Mid-IR MSX fluxesIRASIRAS fieldobs.fieldcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIR[A-I] IR peak designation (1)meta.id;meta.maincharn_IR[a] Peak observed with ISOCAM (2)meta.notecharoRAOffset in RA of IR peak (G1)arcsecpos.eq.ra;arith.diffintoDEOffset in DE of IR peak (G1)arcsecpos.eq.dec;arith.diffintF8.3um? Flux at 8.3um (MSX A band)Jyphot.flux.density;em.IR.8-15umfloatnullableF12.1um? Flux at 12.1um (MSC C band)Jyphot.flux.density;em.IR.8-15umfloatnullableF14.7um? Flux at 14.7um (MSC D band)Jyphot.flux.density;em.IR.8-15umfloatnullableF21.4um? Flux at 21.4um (MSC E band)Jyphot.flux.density;em.IR.15-30umfloatnullable_RAPosition (computed from IRAS name with position offsets) (right ascension part)degpos.eq.ra;meta.main_DEPosition (computed from IRAS name with position offsets) (declination part)degpos.eq.dec;meta.mainJ/A+A/481/345/table4Mid-IR ISOCAM fluxesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIRASIRAS fieldobs.fieldcharIR[AB 1-3] IR peak designation (1)meta.id;meta.maincharoRAOffset in RA of IR peak (G1)arcsecpos.eq.ra;arith.diffintoDEOffset in DE of IR peak (G1)arcsecpos.eq.dec;arith.diffintF6.75um? Flux at 6.75um (ISOCAM LW2 filter)Jyphot.flux.density;em.IR.4-8umfloatnullableF15um? Flux at 15um (ISOCAM LW3 filter)Jyphot.flux.density;em.IR.8-15umfloatnullable_RAPosition (computed from IRAS name with position offsets) (right ascension part)degpos.eq.ra;meta.main_DEPosition (computed from IRAS name with position offsets) (declination part)degpos.eq.dec;meta.main