J/ApJ/730/78ivo://CDS.VizieR/J/ApJ/730/78doi:10.26093/cds/vizier.17300078CDSCarlson L.R.Sewilo M.Meixner M.Romita K.A.Whitney B.Hora J.L.,Cignoni M.Sabbi E.Nota A.Sirianni M.Smith L.J.Gordon K.,Babler B.Bracker S.Gallagher J.S.Meade M.Misselt K.Pasquali A.,Shiao B.2026-02-17T20:01:17Z2012-11-13T07:09:06ZCDS support team

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

cds-question@unistra.fryoung-stellar-objectsopen-star-clustershst-photometryinfrared-photometryWe present the photometric catalogs for the star-forming cluster NGC 602 in the wing of the Small Magellanic Cloud covering a range of wavelengths from optical (HST/ACS F555W, F814W, and SMARTS/ANDICAM V, I) to infrared (Spitzer/IRAC 3.6, 4.5, 5.8, and 8um and MIPS 24um). Combining this with Infrared Survey Facility near-infrared photometry (J, H, Ks), we compare the young main sequence (MS) and pre-main sequence (PMS) populations prominent in the optical with the current young stellar object (YSO) populations revealed by the infrared. We analyze the MS and PMS population with isochrones in color-magnitude diagrams to derive ages and masses. The optical data reveal ~565 PMS candidates, low-mass Stage III YSOs. We characterize ~40 YSOs by fitting their spectral energy distributions to a grid of models (Robitaille et al. 2007ApJS..169..328R) to derive luminosities, masses, and evolutionary phase (Stages I-III). The higher resolution HST images reveal that ~70% of the YSO candidates are either multiples or protoclusters. For YSOs and PMS sources found in common, we find a consistency in the masses derived. We use the YSO mass function to derive a present-day star formation rate of ~0.2-1.0M_{sun}_/yr/kpc^2^, similar to the rate derived from the optical star formation history suggesting a constant star formation rate for this region.2011ApJ...730...78Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/730/78CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/288 : IRSF Magellanic Clouds Point Source Catalog (Kato+ 2007)II/305 : SAGE LMC and SMC IRAC Source Catalog (IPAC 2009)J/ApJ/681/290 : HST/ACS photometry in the SMC (Schmalzl+, 2008)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/730/78https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/730/78http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/730/78https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/730/78https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/730/78http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/730/78GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/730/78/table2 (Optical photometry table)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/730/78/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/730/78/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/730/78/table2?GETtext/xml+votable180.050000true22.39806-73.558520.005555555555555556Cone search capability for table J/ApJ/730/78/table3 (IRAC photometry table)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/730/78/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/730/78/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/730/78/table3?GETtext/xml+votable180.050000true22.22277083-73.574308330.005555555555555556Cone search capability for table J/ApJ/730/78/table4 (Fluxes of all 77 fitter sources including those fit in multiple ways)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/730/78/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/730/78/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/730/78/table4?GETtext/xml+votable180.050000true22.35823-73.579690.005555555555555556Cone search capability for table J/ApJ/730/78/table5 (*Young stellar object parameters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/730/78/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/730/78/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/730/78/table5?GETtext/xml+votable180.050000true22.35823-73.579690.0055555555555555566/33297 332996.772611666688002e-21 3.829809573510641e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/730/78?format=asciiInfrareddefaultJ/ApJ/730/78/table2Optical photometry tablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/4535] Source index numbermeta.idintNameSource designation (JHHMMSS.sss+DDMMSS.ss)meta.id;meta.maincharRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainVmag? HST/ACS F555W filter magnitudemagphot.mag;em.opt.VfloatnullableH91?=0 Hutchings et al. 1991AJ....101..933H spectroscopic O/B star number (<Cl* NGC 602 HTCP NN> in Simbad)meta.id.crossintnullablee_Vmag? Uncertainty in Vmagmagstat.error;phot.magfloatnullableImag[13.51/27.91] HST/ACS F814W filter magnitudemagphot.mag;em.opt.Ifloate_ImagUncertainty in Imagmagstat.error;phot.magfloats[2/12] Source of photometry (1)meta.ref;pos.frameintS08Schmalzl et al. 2008, Cat. J/ApJ/681/290 identifier (<Cl* NGC 602 SGD NNNN> for Simbad)meta.id.crossintIRAC[1/598]? Matching IRAC source identifier from Table 3meta.id.crossintnullableN[0/9] Total number of optical sources matching the same IRAC sourcemeta.numberintJ/ApJ/730/78/table3IRAC photometry tableG07Gouliermis et al. 2007ApJ...665..306G YSO candidate identifier(s) (<[GQH2007] NN> in Simbad)meta.id.crosscharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[7/703] Source index numbermeta.idintNameSource designation (SSTNGC602/SSTISAGE1A JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharprimaryFlink to fluxes of fitted sources (table 4)meta.ref.urlcharONameOther identifier (G1)meta.idcharRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.main[3.6]? Spitzer/IRAC 3.6 micron band magnitudemagphot.mag;em.IR.3-4umfloatnullablee_[3.6]? Uncertainty in [3.6]magstat.errorfloatnullable[4.5]? Spitzer/IRAC 4.5 micron band magnitudemagphot.mag;em.IR.4-8umfloatnullablee_[4.5]? Uncertainty in [4.5]magstat.errorfloatnullable[5.8]? Spitzer/IRAC 5.8 micron band magnitudemagphot.flux.density;em.IR.4-8umfloatnullablee_[5.8]? Uncertainty in [5.8]magstat.errorfloatnullable[8.0]? Spitzer/IRAC 8.0 micron band magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_[8.0]? Uncertainty in [8.0]magstat.errorfloatnullable[24]? Spitzer/MIPS 24 micron band magnitudemagphot.flux.density;em.IR.15-30umfloatnullablee_[24]? Uncertainty in [24]magstat.errorfloatnullableN[0/2] Total number of optical sources matching the same IRAC sourcemeta.numberintMatchID(s)s of all optical sources matched from Table 2meta.id.assocnullableH91[1/12]? Hutchings et al. 1991AJ....101..933H spectroscopic O/B star numbermeta.id.crossintnullableK07Cross-match with IRSF SMC point source catalog within 1"meta.ref.urlintnullableJ/ApJ/730/78/table4Fluxes of all 77 fitter sources including those fit in multiple waysIDSource name, <[CSM2011] ANNN> in Simbadmeta.idcharNameIRAC designation (SSTNGC602/SSTISAGE1A JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainF(V)? HST/ACS F555W filter flux density (2)mJyphot.flux.density;em.opt.VfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_ID[io] Notes for source 270 (G2)meta.notechare_F(V)? Uncertainty in S(V) (3)mJystat.errorfloatnullableF(I)? HST/ACS F814W filter flux density (2)mJyphot.flux.density;em.opt.Ifloatnullablee_F(I)? Uncertainty in S(I) (3)mJystat.errorfloatnullableF(J)? IRSF J band flux density (4)mJyphot.flux.density;em.IR.Jfloatnullablee_F(J)? Uncertainty in S(J) (3)mJystat.errorfloatnullableF(H)? IRSF H band flux density (4)mJyphot.flux.density;em.IR.Hfloatnullablee_F(H)? Uncertainty in S(K) (3)mJystat.errorfloatnullableF(K)? IRSF K_S_ band flux density (4)mJyphot.mag;em.IR.Kfloatnullablee_F(K)? Uncertainty in S(K) (3)mJystat.errorfloatnullableF(3.6)Spitzer/IRAC 3.6 micron band flux densitymJyphot.flux.density;em.IR.3-4umfloate_F(3.6)Uncertainty in S(3.6) (3)mJystat.errorfloatF(4.5)? Spitzer/IRAC 4.5 micron band flux densitymJyphot.mag;em.IR.4-8umfloatnullablee_F(4.5)? Uncertainty in S(4.5) (3)mJystat.errorfloatnullableF(5.8)? Spitzer/IRAC 5.8 micron band flux densitymJyphot.flux.density;em.IR.4-8umfloatnullablee_F(5.8)? Uncertainty in S(5.8) (3)mJystat.errorfloatnullableF(8.0)? Spitzer/IRAC 8.0 micron band flux densitymJyphot.flux.density;em.IR.8-15umfloatnullablee_F(8.0)? Uncertainty in S(8.0) (3)mJystat.errorfloatnullableF(24)? Spitzer/MIPS 24 micron band flux densitymJyphot.flux.density;em.IR.15-30umfloatnullablee_F(24)? Uncertainty in S(24) (3)mJystat.errorfloatnullableJ/ApJ/730/78/table5*Young stellar object parametersG07Identification number(s) from Gouliermis et al. (2007ApJ...665..306G; <[GQH2007] NN> in Simbad)meta.id.crosscharMdisk? Mean disk masssolMassphys.massdoublenullablel_e_MdiskLimit flag on e_Mdiskmeta.code.errorchare_Mdisk? Uncertainty on MdisksolMassstat.errorfloatnullableStageEvolutionary stage (U=unclassified probable YSO)src.classcharSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameYSO designation (G1)meta.id;meta.maincharn_Name[ioe ] Notes (G2)meta.notecharf_Name[efghik, ] Flag on Name (1)meta.codecharl_NoptLimit flag on Noptmeta.code.errorcharNopt? Approximate number of optical sources within the 1.6" IRAC aperture radiusmeta.numberintnullablef_Nopt[il] Flag on Nopt (1)meta.codecharChi2{chi}^2^_min_ (cpd) per data pointstat.fit.chi2floatNfitsNumber of fits with cpd between cpd_min_ and cpd_min_+0.5meta.numberintMopt? Sum of the optical massessolMassphys.massfloatnullablef_Mopt[j] Flag on Mopt (1)meta.codecharMs? Mean IR masssolMassphys.massfloatnullablee_Ms? Standard deviation of the mean IR masssolMassstat.errorfloatnullableLs? Mean luminosity1000solLumphys.luminosityfloatnullablel_e_LsLimit flag on e_Lsmeta.code.errorchare_Ls? Uncertainty on Ls1000solLumstat.errorfloatnullablel_dM/dtLimit flag on dM/dtmeta.code.errorchardM/dt? Accretion rate0.0001solMass.yr**-1arith.ratefloatnullablel_e_dM/dtLimit flag on e_dM/dtmeta.code.errorchare_dM/dt? Uncertainty on dM/dt0.0001solMass.yr**-1stat.errorfloatnullablel_MdiskLimit flag on Mdiskmeta.code.errorchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main