J/ApJ/888/118ivo://CDS.VizieR/J/ApJ/888/118doi:10.26093/cds/vizier.18880118CDSMontes V.A.Hofner P.Oskinova L.M.Linz H.2022-01-17T11:46:14Z2021-08-04T10:18:58ZCDS support team

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

cds-question@unistra.frstar-forming-regionsx-ray-sourcesinfrared-photometryyoung-stellar-objectsWe present the results from Chandra X-ray observations, and near- and mid-infrared analysis, using VISTA/VVV and Spitzer/GLIMPSE catalogs, of the high-mass star-forming region IRAS 16562-3959, which contains a candidate for a high-mass protostar. We detected 249 X-ray sources within the ACIS-I field of view. The majority of the X-ray sources have low count rates (<0.638cts/ks) and hard X-ray spectra. The search for YSOs in the region using VISTA/VVV and Spitzer/GLIMPSE catalogs resulted in a total of 636 YSOs, with 74 Class I and 562 Class II YSOs. The search for near- and mid-infrared counterparts of the X-ray sources led to a total of 165 VISTA/VVV counterparts, and a total of 151 Spitzer/GLIMPSE counterparts. The infrared analysis of the X-ray counterparts allowed us to identify an extra 91 Class III YSOs associated with the region. We conclude that a total of 727 YSOs are associated with the region, with 74 Class I, 562 Class II, and 91 Class III YSOs. We also found that the region is composed of 16 subclusters. In the vicinity of the high-mass protostar, the stellar distribution has a core-halo structure. The subcluster containing the high-mass protostar is the densest and the youngest in the region, and the high-mass protostar is located at its center. The YSOs in this cluster appear to be substantially older than the high-mass protostar.2020ApJ...888..118Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/888/118CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/chandra : The Chandra Archive Log (CXC, 1999-2014)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)II/293 : GLIMPSE Source Catalog (I + II + 3D) (IPAC 2008)II/348 : VISTA Variable in the Via Lactea Survey DR2 (Minniti+, 2017)II/368 : The Spitzer (SEIP) source list (SSTSL2) (Spitzer Science Center, 2021)J/ApJS/160/353 : Membership of the Orion nebula population (Getman+, 2005)J/ApJ/669/493 : Spitzer/Chandra YSOs in Serpens cloud core (Winston+, 2007)J/ApJS/177/465 : X-ray variability in NGC6946, NGC4485/90 (Fridriksson+, 2008)J/ApJ/686/1195 : IR photometry in the {gamma} Vel cluster (Hernandez+, 2008)J/ApJS/184/18 : Spitzer survey of young stellar clusters (Gutermuth+, 2009)J/A+A/534/A131 : Clumps in the giant molecular cloud G345.5+1.0 (Lopez+, 2011)J/ApJ/743/166 : X-ray and infra-red study of RCW 38 (Winston+, 2011)J/AJ/144/192 : Spitzer survey of Orion A & B. I. YSO catalog (Megeath+, 2012)J/A+A/550/A42 : Extinction map towards the Galactic bulge (Chen+, 2013)J/ApJ/787/108 : Ages for massive SFR stellar populations (Getman+, 2014)J/ApJ/787/109 : Age estimates for NGC 2024 and ONC stars (Getman+, 2014)J/ApJS/213/1 : The MSFRs Omnibus X-ray Catalog (MOXC) (Townsley+, 2014)J/ApJS/219/41 : VLA & Chandra obs. of IRAS20126+4104 region (Montes+, 2015)J/ApJ/822/49 : Cand. YSOs in AFGL 333 with NEWFIRM & Spitzer (Jose+, 2016)J/A+A/595/A88 : G345.45+1.50 ^13^CO(3-2) clumps (Lopez-Calderon+, 2016)J/ApJS/227/25 : 6 & 1.3cm deep VLA obs. toward high-mass SFRs (Rosero+, 2016)J/A+A/585/A49 : VCNS II. The IR-excess-selected population (Zeidler+, 2016)J/A+A/615/A148 : Pre-main sequence stars in Scorpius OB1 (Damiani, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/888/118https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/888/118http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/888/118https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/888/118https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/888/118http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/888/118GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/888/118/sources (X-ray sources (Table 2) and IR counterparts (Table 4))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/888/118/sources?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/888/118/sources?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/888/118/sources?GETtext/xml+votable180.050000true254.7197083-40.03838890.0055555555555555566/423982.0616683193919197e-20 1.7798557115773645e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/888/118?format=asciiX-rayInfrareddefaultJ/ApJ/888/118/sourcesX-ray sources (Table 2) and IR counterparts (Table 4)e_Jmag[0.001/0.3]? Uncertainty in Jmagmagstat.error;phot.magfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/249] Running sequence numbermeta.id;meta.mainintprimaryspDisplay the X-ray properties of this source (link to Table 3)meta.ref.urlcharRAJ2000[16/17] Hour of Chandra Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000[39/40] Degree of Chandra Declination (J2000)pos.eq.dec;meta.mainCR[0.09/5.8] Observed count ratect/ksphot.count;em.X-rayfloatFx[0/12] Observed X-ray flux; 10^-14^erg/s/cm^2^1e-14mW.m**-2phot.flux;em.X-rayfloatHR[-1/0.93] Hardness ratio (1)phot.flux;arith.ratiofloatSTVar1[0/2]? Short Term variability in obs #1 (var if >5) (2)src.var.indexintnullableSTVar2[0/9]? Short Term variability in obs #2 (var if >5) (2)src.var.indexintnullableSTVar3[0/9]? Short Term variability in obs #3 (var if >5) (2)src.var.indexintnullableLTVar[0.05/14.1]? Long Term variability parameter (variable if >3)src.var.indexfloatnullableVarVariability type(s) (STV=short term variability or LTV=long term variability)meta.code;src.varcharJmag[9.18/19.8]? J band magnitudemagphot.mag;em.IR.JfloatnullableHmag[8.7/19.3]? H band magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag[0/0.4]? Uncertainty in Hmagmagstat.error;phot.magfloatnullableKsmag[8.7/18.6]? Ks band magnitudemagphot.mag;em.IR.Kfloatnullablee_Ksmag[0/0.4]? Uncertainty in Ksmagmagstat.error;phot.magfloatnullable3.6mag[7/14.3]? Spitzer/IRAC 3.6 micron band magnitudemagphot.mag;em.IR.3-4umfloatnullablee_3.6mag[0.03/0.3]? Uncertainty in 3.6magmagstat.errorfloatnullable4.5mag[6.7/14.1]? Spitzer/IRAC 4.5um band magnitudemagphot.mag;em.IR.4-8umfloatnullablee_4.5mag[0.03/0.4]? Uncertainty in 4.5magmagstat.errorfloatnullable5.8mag[6.5/12.7]? Spitzer/IRAC 5.8um band magnitudemagphot.flux.density;em.IR.4-8umfloatnullablee_5.8mag[0.03/0.4]? Uncertainty in 5.8magmagstat.errorfloatnullable8.0mag[6.9/10.9]? Spitzer/IRAC 8.0um band magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_8.0mag[0.02/0.3]? Uncertainty in 8.0magmagstat.errorfloatnullableTypeSource typesrc.classcharVVVDisplay the VISTA VVV DR2 data (II/348) within 1.5"meta.ref.urlcharGLIMPSEDisplay the GLIMPSE cat (II/293) within 3"meta.ref.urlcharJ/ApJ/888/118/table3X-ray propertiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[3/245] Source numbermeta.id;meta.mainintNH[0.2/41.4] Hydrogen column density1e+22cm**-2phys.columnDensityfloatE_NH[0.2/31] Upper uncertainty in NH1e+22cm**-2stat.error;stat.maxfloate_NH[0.17/15] Lower uncertainty in NH1e+22cm**-2stat.errorfloatkT[0.29/8.7] TemperaturekeVphys.temperaturefloatf_kT[a] Flag on kT (1)meta.codecharE_kT[0.5/3.6]? Upper uncertainty in kTkeVstat.error;stat.maxfloatnullablee_kT[0.2/1.8]? Lower uncertainty in kTkeVstat.error;phys.energyfloatnullableEM[0.9/263] Emission measure1e-05cm**-3phys.emissMeasurefloatE_EM[0.5/850] Upper uncertainty in EM1e-05cm**-3stat.error;stat.maxfloate_EM[0.45/225] Lower uncertainty in EM1e-05cm**-3stat.errorfloatFx[1.1/214] Corrected X-ray flux; in 10^-14^erg/s/cm^2^ units1e-14mW.m**-2phot.flux;em.X-rayfloatE_Fx[0.5/130] Upper uncertainty in Fx1e-14mW.m**-2stat.error;stat.maxfloate_Fx[0.5/173] Lower uncertainty in Fx1e-14mW.m**-2stat.errorfloatlogLx[30.5/33] log corrected X-ray luminositylog(1e-07W)phys.luminosity;em.X-rayfloatchi2[0.01/1.2] Reduced {chi}^2^stat.fit.chi2float