J/other/PASA/39.ivo://CDS.VizieR/J/other/PASA/39.24doi:10.26093/cds/vizier/ds/djkceCDSAzatyan N.Nikoghosyan E.Harutyunian H.Baghdasaryan D.Andreasyan D.2026-03-17T20:08:44Z2022-08-12T08:58:26ZCDS support team

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

cds-question@unistra.frinfrared-photometryyoung-stellar-objectsh-ii-regionsstar-forming-regionsstellar-massesstellar-agesstellar-distanceUltra-compact H II (UC HII) regions are an important phase in the formation and early evolution of massive stars and a key component of the interstellar medium (ISM). The main objectives of this work are to study the young stellar population associated with the G45.07+0.13 and G45.12+0.13 UC HII regions, as well as the ISM in which they are embedded. We determined the distribution of the hydrogen column density (N(H_2_)) and dust temperature (T_d_) in the molecular cloud using Modified blackbody fitting on Herschel images obtained in four bands: 160, 250, 350, and 500um. We used near-, mid-, and far-infrared photometric data to identify and classify the young stellar objects (YSOs). Their main parameters were determined by the radiation transfer models. We also constructed a colour-magnitude diagram and K luminosity functions (KLFs) to compare the parameters of stellar objects with the results of the radiative transfer models. We found that N(H_2_) varies from ~3.0x10^23^ to 5.5x10^23^cm^-2^ within the G45.07+0.13 and G45.12+0.13 regions, respectively. The maximum T_d_ value is 35K in G45.12+0.13 and 42K in G45.07+0.13. T_d_ then drops significantly from the centre to the periphery, reaching about 18-20K at distances of ~2.6 and ~3.7pc from InfraRed Astronomical Satellite (IRAS) 19110+1045 (G45.07+0.13) and IRAS 19111+1048 (G45.12+0.13), respectively. The gas plus dust mass value included in G45.12+0.13 is ~3.4x10^5^M_{sun}_ and ~1.7x10^5^M_{sun}_ in G45.07+0.13. The UC HII regions are connected through a cold (T_d_=19K) bridge. The radial surface density distribution of the identified 518 YSOs exhibits dense clusters in the vicinity of both IRAS sources. The parameters of YSOs in the IRAS clusters (124 objects) and 394 non-cluster objects surrounding them show some differences. About 75% of the YSOs belonging to the IRAS clusters have an evolutionary age greater than 106yr. Their slope {alpha} of the KLF agrees well with a Salpeter-type initial mass function (IMF) ({gamma}=1.35) for a high mass range (O-F stars, {beta}~2) at 1Myr. The non-cluster objects are uniformly distributed in the molecular cloud, 80% of which are located to the right of the 0.1Myr isochrone. The slope {alpha} of the KLF of non-cluster objects is 0.55+/-0.09 , corresponding better to a Salpeter-type IMF for low-mass objects (G-M stars, {beta}~1). Our results show that two dense stellar clusters are embedded in these two physically connected UC HII regions. The clusters include several high- and intermediate-mass zero-age main sequence stellar objects. Based on the small age spread of the stellar objects, we suggest that the clusters originate from a single triggering shock. The extended emission observed in both UC HII regions is likely due to the stellar clusters.2022PASA...39...24Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/PASA/39.24CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/114 : MSX6C Infrared Point Source Catalog (Egan+ 2003)II/293 : GLIMPSE Source Catalog (I + II + 3D) (IPAC 2008)II/316 : UKIDSS-DR6 Galactic Plane Survey (Lucas+ 2012)II/319 : UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012)II/311 : WISE All-Sky Data Release (Cutri+ 2012)VI/139 : Herschel Observation Log (Herschel Science Centre, 2013)VIII/106 : Herschel/PACS Point Source Catalogs (Herschel team, 2017)J/ApJS/91/659 : Ultracompact HII regions radio images (Kurtz+ 1994)J/AJ/111/1964 : JHK photometry of NGC1333 (Lada+, 1996)J/A+AS/120/283 : Water maser features in ultracompact HII reg. (Hofner+ 1996)J/AJ/129/856 : Herbig Ae/Be stars in nearby OB assoc. (Hernandez+, 2005)J/AJ/131/1574 : Infrared photometry of IC348 members (Lada+, 2006)J/ApJ/674/336 : Spitzer observations of NGC 1333 (Gutermuth+, 2008)J/ApJ/678/200 : YSOs in N63 and N180 (Caulet+, 2008)J/A+A/487/993 : MAMBO Mapping of c2d Clouds and Cores (Kauffmann+, 2008)J/ApJ/685/1005 : Spitzer and high-mass star forming regions (Qiu+, 2008)J/AJ/136/2413 : Galactic midplane Spitzer red sources (Robitaille+, 2008)J/ApJ/723/915 : BLAST view of Aquila star-forming reg (Rivera-Ingraham+, 2010)J/A+A/542/A3 : Stellar clusters from UKIDSS GPS (Solin+, 2012)J/ApJ/799/29 : BGPS. XII. DR2 distance catalog (Ellsworth-Bowers+, 2015)J/A+A/581/A124 : SFR IRAS05137+3919 star and jet multiplicity (Cesaroni+, 2015)J/A+A/584/A91 : Dense cores in Aquila from Herschel (Konyves+, 2015)J/AJ/149/64 : MIPSGAL 24{mu}m point source catalog (Gutermuth+, 2015)J/A+A/591/A149 : Hi-GAL. inner Milky Way: +68>=l>=70 (Molinari+, 2016)J/A+A/622/A38 : IRAS05168+3634 star-forming region (Azatyan, 2019)J/ApJ/874/16 : SOFIA Massive Star Formation Survey. II. (Liu+, 2019)J/A+A/645/A55 : Catalog of cold cores in Perseus (Pezzuto+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/PASA/39.24https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/PASA/39.24http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/PASA/39.24https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/PASA/39.24https://vizier.iucaa.in/viz-bin/votable?-source=J/other/PASA/39.24http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/PASA/39.24GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/other/PASA/39.24/nir (NIR photometric data of selected YSOs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/PASA/39.24/nir?https://vizier.iucaa.in/viz-bin/conesearch/J/other/PASA/39.24/nir?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/PASA/39.24/nir?GETtext/xml+votable180.050000true288.363916710.89234720.005555555555555556Cone search capability for table J/other/PASA/39.24/fir (FIR photometric data of selected YSOs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/PASA/39.24/fir?https://vizier.iucaa.in/viz-bin/conesearch/J/other/PASA/39.24/fir?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/PASA/39.24/fir?GETtext/xml+votable180.050000true288.363916710.89234720.0055555555555555566/30622 306443.2031150387835462e-22 1.692669228152603e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/other/PASA/39.24?format=asciiInfrareddefaultJ/other/PASA/39.24/nirNIR photometric data of selected YSOsRegionRegion ("IRAS19110+1045", "IRAS19111+1048" or "Non-cluster":394 occurrences)meta.id.parentcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDID number in final list of members (1-517 and "IRAS19111+1048")meta.id;meta.maincharprimaryRAJ2000[19] Right ascension (J2000) from UKIDSS surveypos.eq.ra;meta.mainDEJ2000[10] Declination (J2000) from UKIDSS surveypos.eq.dec;meta.mainJmag[14.5/20.5]? UKIDSS DR6 J magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag[0.002/0.5]? rms uncertainty on Jmagmagstat.error;phot.magfloatnullableHmag[12.2/19]? UKIDSS DR6 H magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag[0.001/0.3]? rms uncertainty on Hmagmagstat.error;phot.magfloatnullableKmag[11/17.8]? UKIDSS DR6 K magnitudemagphot.mag;em.IR.Kfloatnullablee_Kmag[0.001/0.2]? rms uncertainty on Kmagmagstat.error;phot.magfloatnullable[3.6]mag[9.7/14.9]? GLIMPSE IRAC 3.6um magnitudemagphot.mag;em.IR.3-4umfloatnullablee_[3.6]mag[0.05/0.3]? rms uncertainty on [3.6]magmagstat.error;phot.magfloatnullable[4.5]mag[9.7/14.1]? GLIMPSE IRAC 4.5um magnitudemagphot.mag;em.IR.4-8umfloatnullablee_[4.5]mag[0.05/0.4]? rms uncertainty on [4.5]magmagstat.error;phot.magfloatnullable[5.8]mag[9.3/13.1]? GLIMPSE IRAC 5.8um magnitudemagphot.flux.density;em.IR.4-8umfloatnullablee_[5.8]mag[0.05/0.4]? rms uncertainty on [5.8]magmagstat.error;phot.magfloatnullable[8.0]mag[9.4/12.8]? GLIMPSE IRAC 8.0um magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_[8.0]mag[0.04/0.4]? rms uncertainty on [8.0]magmagstat.error;phot.magfloatnullable[24]mag[3.9/7.2]? MIPSGAL MIPS 24um magnitudemagphot.flux.density;em.IR.15-30umfloatnullablee_[24]mag[0.1/0.2]? rms uncertainty on [24]magmagstat.error;phot.magfloatnullableW1mag[8.3/13.8]? WISE W1 magnitudemagphot.mag;em.IR.3-4umfloatnullablee_W1mag[0.02/0.5]? rms uncertainty on W1magmagstat.error;phot.magfloatnullableW2mag[5.6/15.3]? WISE W2 magnitudemagphot.mag;em.IR.4-8umfloatnullablee_W2mag[0/0.3]? rms uncertainty on W2magmagstat.error;phot.magfloatnullableW3mag[-2.7/12]? WISE W3 magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_W3mag[0/0.5]? rms uncertainty on W3magmagstat.error;phot.magfloatnullableW4mag[-5.8/8.9]? WISE W4 magnitudemagphot.flux.density;em.IR.15-30umfloatnullablee_W4mag[0/0.2]? rms uncertainty on W4magmagstat.error;phot.magfloatnullablealpha[-1.8/2]? alpha_(IRAC) slopespect.indexfloatnullableClassFinal classification of YSOs according to color-color diagrams and alpha_(IRAC)_ slope ("ClassI": 33 occurrences; "ClassII": 485 occurrences)src.classcharGPS6Display the UKIDSS-DR6 data (II/316) within 0.5"meta.ref.urlintnullableGLIMPSEDisplay the GLIMPSE data (II/293) within 1.5"meta.ref.urlintnullableMIPSDisplay MIPSGAL data (Gutermuth+ 2015, J/AJ/149/64) within 3"meta.ref.urlintnullableWISEDisplay the WISE data (II/311) within 3"meta.ref.urlintnullableFIRDisplay FIR data for this sourcemeta.ref.urlintnullableSEDDisplay SED results for this sourcemeta.ref.urlintnullableJ/other/PASA/39.24/firFIR photometric data of selected YSOsIDID number in final list of membersmeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintF70[302/342846]? Herschel PACS or HiGAL 70um measured fluxmJyphot.flux.density;em.IR.60-100umintnullablee_F70[113/1014]? rms uncertainty on F70mJystat.errorintnullableF160[658/1326590]? Herschel PACS or HiGAL 160um measured fluxmJyphot.flux.density;em.mm.1500-3000GHzintnullablee_F160[248/1069]? rms uncertainty on F160mJystat.errorintnullableF250[14589/78693]? Herschel SPIRE or HiGAL 250um measured fluxmJyphot.flux.density;em.mm.750-1500GHzintnullablee_F250[497/781]? rms uncertainty on F250mJystat.errorintnullableF350[3234/20365]? Herschel SPIRE or HiGAL 350um measured fluxmJyphot.flux.density;em.mm.750-1500GHzintnullablee_F350[674/1379]? rms uncertainty on F350mJystat.errorintnullableF500[15212/15212]? Herschel SPIRE or HiGAL 500um measured fluxmJyphot.flux.density;em.mm.400-750GHzintnullablee_F500[3134/3134]? rms uncertainty on F500mJystat.errorintnullableRAJ2000[19] Right ascension (J2000) from UKIDSS surveypos.eq.ra;meta.mainDEJ2000[10] Declination (J2000) from UKIDSS surveypos.eq.dec;meta.mainClassFinal classification of YSOs according to color-color diagrams and alpha_(IRAC)_ slopesrc.classcharRegionRegionmeta.id.parentcharJ/other/PASA/39.24/sedParameters derived from Robitaille+ (2007ApJS..169..328R) models SED fittingDist[6.5/9.5] Distancekpcpos.distance;pos.heliocentricfloatMdotD[-13.4/-4.8]? Disk accretion ratelog(solMass.yr**-1)arith.ratefloatnullablee_MdotD[0/14.7]? rms uncertainty on MdotDlog(solMass.yr**-1)stat.errorfloatnullableIDID number in final list of membersmeta.id;meta.maincharlogLtot[1.2/4.1] Total luminositylog(solLum)phys.luminosity;em.IRfloate_logLtot[0/3.6] rms uncertainty on logLTotlog(solLum)stat.errorfloatClFinal classification of YSOs according to color-color diagrams and alpha_(IRAC)_ slope ("I": 16 occurrences; "II": 407 occurrences)src.classcharRegionRegion ("IRAS19111+1048", "IRAS19110+1045" or "Non-cluster")meta.id.parentcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNd[3/9] Number of input fluxesmeta.numberintNfit[1/3666] Number of fitting models formeta.numberintAv[10/27] Interstellar extinctionmagphys.absorptionfloate_Av[0/7.5] rms uncertainty on Avmagstat.errorfloate_Dist[0/2.3] rms uncertainty on Distancekpcstat.errorfloatlogAge[3/6.8] log of stellar agelog(yr)time.agefloate_logAge[0/6.6] rms uncertainty on logAgelog(yr)stat.error;time.agefloatMass[1.9/21.9] Stellar masssolMassphys.massfloate_Mass[0/4.3] rms uncertainty on MasssolMassstat.error;phys.massfloatT[4165/23170] TemperatureKphys.temperatureinte_T[0/10771] rms uncertainty on TKstat.errorintlogMd[-7.2/-0.3]? Disk masslog(solMass)phys.massfloatnullablee_logMd[0/7.6]? rms uncertainty on logMdisklog(solMass)stat.errorfloatnullableMdotE[-9.4/-2.2]? Envelope accretion ratelog(solMass.yr**-1)arith.ratefloatnullablee_MdotE[0/9.8]? rms uncertainty on MdotElog(solMass.yr**-1)stat.errorfloatnullable