J/other/PASA/41.ivo://CDS.VizieR/J/other/PASA/41.55CDSAzatyan N.Nikoghosyan E.Samsonyan A.Elia D.Kaper L.Yeghikyan A.,Andreasyan D.Baghdasaryan D.2025-02-13T07:48:56Z2024-09-27T12:03:55ZCDS support team

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

cds-question@unistra.frmolecular-cloudsh-ii-regionsyoung-stellar-objectsinfrared-photometrymillimeter-astronomyphotometrysubmillimeter-astronomyextinctioninterstellar-mediumstellar-massesstellar-agesstellar-distanceUnderstanding the characteristics of young stellar populations is essential for deriving insights into star formation processes within parent molecular clouds and the influence of massive stars on these processes. This study primarily aims to investigate the young stellar objects (YSOs) within the molecular cloud G 045.49+00.04, including three ultra-compact HII (UC HII) regions: G 45.48+0.13 (IRAS19117+1107), G 45.45+0.06 (IRAS 19120+1103), and G 45.47+0.05. We used near-, mid-, and far-infrared photometric data along with radiation transfer models and the modified blackbody fitting to identify and study the YSOs and the interstellar medium (ISM). In total, we identified 1482 YSOs in a 12 arcmin radius covering GRSMC 045.49+00.04, with a mass range from 1.5M_{sun}_ to 22M_{sun}_. Of these, 315 objects form relatively dense clusters in the UC HII regions, close to the IRAS 19120+1103 and 19117+1107 sources. In each UC HII region, several high-mass stars have been identified, which in all likelihood are responsible for the ionization. The YSOs with 21.8M_{sun}_ and 13.7+/-0.4M_{sun}_ are associated with IRAS 19120+1103 and 19117+1107, respectively. The non-cluster YSOs (1168) are uniformly distributed on the field. The distribution of YSOs from both samples on the colour-magnitude diagram and by the evolutionary ages is different. About 75% of objects in the IRAS clusters are concentrated around the Zero Age Main Sequence and have a well-defined peak at an age of Log(Age[years])~6.75, with a narrow spread. The non-cluster objects have two concentrations located to the right and left of the 0.1Myr isochrone and two well-defined peaks at Log(Age)~6.25 and 5.25. The fraction of the near-infrared excess stars, as well as the mass function confirm that the evolutionary age of the cluster is about 1Myr. The K luminosity functions' {alpha} slopes for the IRAS clusters and non-cluster objects are 0.32+/-0.04 and 0.72+/-0.13, respectively. The steeper {alpha} slope is suggesting that the non-cluster objects are less evolved, which is well consistent with the evolutionary age. Similar results -- including evolutionary age, narrow age spread, and the less evolved nature of non-cluster objects -- were also observed for the YSOs in the neighbouring G 45.14+00.14. The both regions (G045.49+00.04 and G45.14+00.14) are located and distinguished by their brightness and density at the edge of the bubble around the highly variable X-ray binary GRS 1915+105, which includes a black hole and a K-giant companion. Based on the above, we can assume that the process of star formation in the young IRAS clusters was triggered by the GRS 1915+105-initiated shock front inside the ISM massive condensation, through the process of "collecting and collapse". Most non-cluster objects probably belong to a later generation. Their formation could be triggered by the recurrent activity of GRS 1915+105 and/or through the edge collapse scenario and mass accumulation through the gas flows along the ISM filaments.2024PASA...41...55Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/PASA/41.55CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/125 : IRAS catalogue of Point Sources, Version 2.0 (IPAC 1986)II/293 : GLIMPSE Source Catalog (I + II + 3D) (IPAC 2008)II/311 : WISE All-Sky Data Release (Cutri+ 2012)II/328 : AllWISE Data Release (Cutri+ 2013)II/316 : UKIDSS-DR6 Galactic Plane Survey (Lucas+ 2012)II/319 : UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012)VI/139 : Herschel Observation Log (Herschel Science Centre, 2013)VIII/106 : Herschel/PACS Point Source Catalogs (Herschel team, 2017)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/other/PASA/39.24 : NIR-FIR phot. of YSOs in 2 UC HII regions (Azatyan+, 2022)citesdata in PASA journal: https://doi.org/10.1017/pasa.2024.61https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/PASA/41.55https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/PASA/41.55http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/PASA/41.55https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/PASA/41.55https://vizier.iucaa.in/viz-bin/votable?-source=J/other/PASA/41.55http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/PASA/41.55GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/other/PASA/41.55/table1 (NIR and MIR photometric data of IRAS sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/PASA/41.55/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/other/PASA/41.55/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/PASA/41.55/table1?GETtext/xml+votable180.050000true288.5129916711.215523060.005555555555555556Cone search capability for table J/other/PASA/41.55/table2 (FIR photometric data of IRAS sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/PASA/41.55/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/other/PASA/41.55/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/PASA/41.55/table2?GETtext/xml+votable180.050000true288.519012511.224443890.005555555555555556Cone search capability for table J/other/PASA/41.55/table3 (Parameters of IRAS sources derived from Robitaille+ 2007ApJS..169..328R models SED fitting)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/PASA/41.55/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/other/PASA/41.55/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/PASA/41.55/table3?GETtext/xml+votable180.050000true288.5196041711.19510.0055555555555555566/30622 306443.2031150387835462e-22 1.692669228152603e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/other/PASA/41.55?format=asciiInfraredMillimeterdefaultJ/other/PASA/41.55/table1NIR and MIR photometric data of IRAS sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1/1482] ID number in final list of membersmeta.id;meta.mainintprimaryFIRDisplay FIR data for this source (link to Table 2)meta.ref.urlintnullableSEDDisplay SED results for this source (link to Table 3)meta.ref.urlintnullableIRASIRAS name (IHHMMm+DDMM; B1950)meta.idcharRAJ2000UKIDSS hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000UKIDSS degree of declination (J2000)pos.eq.dec;meta.mainJmag[10.82/20.61]? UKIDSS DR6 J-band magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag[0/0.5]? rms uncertainty on Jmagmagstat.error;phot.mag;em.IR.JfloatnullableHmag[11.26/19.02]? UKIDSS DR6 H-band magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag[0/0.3]? rms uncertainty on Hmagmagstat.error;phot.mag;em.IR.HfloatnullableKmag[10.44/17.77]? UKIDSS DR6 K band epoch 1 magnitudemagphot.mag;em.IR.Kfloatnullablee_Kmag[0.001/0.3]? rms uncertainty on Kmagmagstat.error;phot.mag;em.IR.KfloatnullableGPS6Display the UKIDSS-DR6 data (II/316) within 0.5"meta.ref.urlchar[3.6]mag[9.91/15.14]? Spitzer/IRAC 3.6um band magnitudemagphot.mag;em.IR.3-4umfloatnullablee_[3.6]mag[0.04/0.4]? rms uncertainty on [3.6]magmagstat.error;phot.mag;em.IR.3-4umfloatnullable[4.5]mag[8.75/14.13]? Spitzer/IRAC 4.5um band magnitudemagphot.mag;em.IR.4-8umfloatnullablee_[4.5]mag[0.03/0.4]? rms uncertainty on [4.5]magmagstat.error;phot.mag;em.IR.4-8umfloatnullable[5.8]mag[6.73/13.1]? Spitzer/IRAC 5.8um band magnitudemagphot.flux.density;em.IR.4-8umfloatnullable[8.0]mag[5.21/12.34]? Spitzer/IRAC 8um band magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_[8.0]mag[0.02/0.4]? rms uncertainty on [8.0]magmagstat.error;phot.mag;em.IR.8-15umfloatnullableGLIMPSEDisplay the GLIMPSE data (II/293) within 1.5"meta.ref.urlintnullable[24]mag[2.97/8.83]? Spitzer/MIPS 24um band magnitudemagphot.flux.density;em.IR.15-30umfloatnullablee_[24]mag[0.02/0.2]? rms uncertainty on [24]magmagstat.error;phot.mag;em.IR.15-30umfloatnullableMIPSGALDisplay the UKIDSS-DR6 data (II/316) within 3"meta.ref.urlcharW1mag[4.69/13.96]? AllWISE W1 (3.4um) band magnitudemagphot.mag;em.IR.3-4umfloatnullablee_W1mag[0.02/0.2]? rms uncertainty on W1magmagstat.error;phot.mag;em.IR.3-4umfloatnullableW2mag[3.56/15.37]? AllWISE W2 (4.6um) band magnitudemagphot.mag;em.IR.4-8umfloatnullablee_W2mag[0.016/0.5]? rms uncertainty on W2magmagstat.error;phot.mag;em.IR.4-8umfloatnullableW3mag[-2.49/11.8]? AllWISE W3 (12um) band magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_W3mag[0.013/0.5]? rms uncertainty on W3magmagstat.error;phot.mag;em.IR.8-15umfloatnullableW4mag[-5.14/8.78]? AllWISE W4 (22um) band magnitudemagphot.flux.density;em.IR.15-30umfloatnullablee_W4mag[0.001/0.5]? rms uncertainty on W4magmagstat.error;phot.mag;em.IR.15-30umfloatnullableAllWISEDisplay the AllWISE data (II/328) within 3"meta.ref.urlcharClassFinal classification of YSOs according to color-color diagrams ("ClassI": 100 occurrences; or "ClassII": 1382 occurrences)src.classcharRegionRegion ("IRAS 19117+1107", "IRAS 19120+1103", or "Non-cluster")meta.id.parentchare_[5.8]mag[0.03/0.4]? rms uncertainty on [5.8]magmagstat.error;phot.mag;em.IR.4-8umfloatnullableJ/other/PASA/41.55/table2FIR photometric data of IRAS sourcesHiGALDisplay the Hi-GAL data (Monlinari+ 2016, J/A+A/591/A149) within 10"meta.ref.urlcharID[8/1413] ID number in final list of membersmeta.id;meta.mainintRAJ2000UKIDSS hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000UKIDSS degree of declination (J2000)pos.eq.dec;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIRASIRAS name (IHHMMm+DDMM; B1950)meta.idchare_F12[0/3940]? rms uncertainty on F12mJystat.error;phot.mag;em.IR.8-15umintnullableF25[0/640000]? IRAS 25um measured fluxmJyphot.flux.density;em.IR.15-30umintnullablee_F25[0/32000]? rms uncertainty on F25mJystat.error;phot.mag;em.IR.15-30umintnullableF60[0/5340000]? IRAS 60um measured fluxmJyphot.flux.density;em.IR.30-60umintnullablee_F60[0/373800]? rms uncertainty on F60mJystat.error;phot.mag;em.IR.60-100umintnullableF100[0/7890000]? IRAS 100um measured fluxmJyphot.flux.density;em.IR.60-100umintnullablee_F100[0/3945000]? rms uncertainty on F100mJystat.errorintnullableF70[0/127275]? Herschel PACS 70um measured fluxmJyphot.flux.density;em.IR.60-100umintnullablee_F70[0/525]? rms uncertainty on P_F70mJystat.error;phot.mag;em.IR.60-100umintnullableF160[0/160355]? Herschel PACS 160um measured fluxmJyphot.flux.density;em.mm.1500-3000GHzintnullableF70Hi[0/1552000]? HiGAL 70um measured fluxmJyphot.flux.density;em.IR.60-100umintnullablee_F70Hi[0/1600]? rms uncertainty on H_F70mJystat.error;phot.mag;em.IR.60-100umintnullableF160Hi[0/842000]? HiGAL 160um measured fluxmJyphot.flux.density;em.mm.1500-3000GHzintnullablee_F160Hi[0/1900]? rms uncertainty on F160mJystat.error;phot.mag;em.mm.1500-3000GHzintnullableF250[0/465000]? HiGAL 250um measured fluxmJyphot.flux.density;em.mm.750-1500GHzintnullablee_F250[0/1859]? rms uncertainty on F250mJystat.error;phot.mag;em.mm.750-1500GHzintnullableF350[0/178498]? HiGAL 350um measured fluxmJyphot.flux.density;em.mm.750-1500GHzintnullablee_F350[0/1814]? rms uncertainty on F350mJystat.error;phot.mag;em.mm.750-1500GHzintnullableF500[0/96000]? HiGAL 500um measured fluxmJyphot.flux.density;em.mm.400-750GHzintnullablee_F500[0/3141]? rms uncertainty on F500mJystat.error;phot.mag;em.mm.400-750GHzintnullableRegionRegionmeta.id.parentcharF12[0/78800]? IRAS 12um measured fluxmJyphot.flux.density;em.IR.8-15umintnullablee_F160[0/156339]? rms uncertainty on P_F160mJystat.error;phot.mag;em.mm.1500-3000GHzintnullableJ/other/PASA/41.55/table3Parameters of IRAS sources derived from Robitaille+ 2007ApJS..169..328R models SED fittingrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000UKIDSS hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000UKIDSS degree of declination (J2000)pos.eq.dec;meta.mainNd[3/12] Number of input fluxesmeta.numberintAv[5/54.4] Interstellar extinctionmagphys.absorptionfloate_Av[0/11.5] Av rms uncertaintymagstat.error;phys.absorptionfloatDist[5.99/9] Distancekpcpos.distance;pos.heliocentricfloate_Dist[0/4.1] Dist rms uncertaintykpcstat.error;pos.distancefloatlogAge[3.17/6.91] Log of stellar agelog(yr)time.agefloate_logAge[0/6.6] logAge rms uncertaintylog(yr)stat.error;time.agefloatMass[1.5/21.8] Stellar masssolMassphys.massfloate_Mass[0/6.7] Mass rms uncertaintysolMassstat.error;phys.massfloatTemp[4119/30328] TemperatureKphys.temperaturedoublee_Temp[0/10003] Temp rms uncertaintyKstat.error;phys.temperaturedoublelogMd[-7.84/-0.27]? log of disk masslog(solMass)phys.massfloatnullablee_logMd[-9.01/0]? logMd rms uncertaintylog(solMass)stat.error;phys.massfloatnullableMdotE[-10.4/4.6]? Envelope accretion ratelog(solMass.yr**-1)phys.mass.lossfloatnullableMdotD[-13.4/-3.95]? Disk accretion ratelog(solMass.yr**-1)phys.mass.lossfloatnullablee_MdotD[-16.2/0]? MdotD rms uncertaintylog(solMass.yr**-1)stat.error;phys.mass.lossfloatnullableLumTot[1.38/5] log of total luminositylog(solLum)phys.luminosity;em.IRfloate_LumTot[0/4.3] LumTot rms uncertaintylog(solLum)stat.error;phys.luminosity;em.IRfloatRegionRegionmeta.id.parentcharID[9/1482] ID number in final list of membersmeta.id;meta.maininte_MdotE[-10.64/0]? MdotE rms uncertaintylog(solMass.yr**-1)stat.error;phys.mass.lossfloatnullableIRASIRAS name (IHHMMm+DDMM; B1950)meta.idcharNfit[1/999] Number of fitted modelsmeta.numberint