J/ApJ/672/914ivo://CDS.VizieR/J/ApJ/672/914doi:10.26093/cds/vizier.16720914CDSHennekemper E.Gouliermis D.A.Henning T.Brandner W.Dolphin A.E.2017-12-06T07:38:19Z2010-05-31T20:30:00ZCDS support team

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

cds-question@unistra.frmagellanic-cloudsstellar-associationspre-main-sequence-starsphotometryIn the third part of our photometric study of the star-forming region NGC 346/N66 and its surrounding field in the Small Magellanic Cloud (SMC), we focus on the large number of low-mass pre-main-sequence (PMS) stars revealed by the Hubble Space Telescope observations with the Advanced Camera for Surveys. We investigate the origin of the observed broadening of the PMS population in the V-I,V color-magnitude diagram. The most likely explanations are either the presence of differential reddening or an age spread among the young stars.2008ApJ...672..914Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/672/914CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/166/549 : HST/ACS observations of NGC 346 (Gouliermis+, 2006)J/ApJ/655/212 : S3MC IRAC and MIPS photometry (Bolatto+, 2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/672/914https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/672/914http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/672/914https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/672/914https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/672/914http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/672/914GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/672/914/table1 (Photometry of OB Stars in NGC 346)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/672/914/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/672/914/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/672/914/table1?GETtext/xml+votable180.050000true14.7685833-72.17346940.005555555555555556Cone search capability for table J/ApJ/672/914/table2 (*Candidate YSOs found with Spitzer in the area centered on NGC 346)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/672/914/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/672/914/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/672/914/table2?GETtext/xml+votable180.050000true14.715-72.1710.0055555555555555566/33317 33328https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/672/914?format=asciiOpticaldefaultJ/ApJ/672/914/table1Photometry of OB Stars in NGC 346recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[GDB2006]Sequential number, as in Gouliermis et al. 2006, Cat. J/ApJS/166/549meta.recordintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVmagAACS V magnitude (1)magphot.mag;em.opt.VfloatVmagCCTIO V magnitude (1)magphot.mag;em.opt.VfloatU-BCTIO U-B colour index (1)magphot.color;em.opt.U;em.opt.BfloatB-VCTIO B-V colour index (1)magphot.color;em.opt.B;em.opt.VfloatSpTypeMK spectral Typesrc.spTypecharQReddening-free parametermagphot.color.reddFreefloat(B-V)0Deredenned B-V colour indexmagphot.color;em.opt.B;em.opt.VfloatE(B-V)B-V colour excessmagphot.color.excessfloatAVAbsorption in V bandmagphot.mag;em.opt.VfloatSimbadSimbad column added by the CDScharJ/ApJ/672/914/table2*Candidate YSOs found with Spitzer in the area centered on NGC 346F555WF555W Vega magnitudemagphot.mag;em.opt.VfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[BSS2007]Sequential number from Bolato et al., 2007, Cat. <J/ApJ/655/212>meta.recordintRAJ2000Right ascension in degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.main[3.6]? IRAC 3.6um magnitudemagphot.mag;em.IR.3-4umfloatnullable[4.5]IRAC 4.5um magnitudemagphot.mag;em.IR.4-8umfloat[5.8]IRAC 5.8um magnitudemagphot.flux.density;em.IR.4-8umfloat[8.0]IRAC 8.0um magnitudemagphot.flux.density;em.IR.8-15umfloat[24]? MIPS 24um magnitudemagphot.flux.density;em.IR.15-30umfloatnullableN*Numbers of stars found to coincide from our ACS photometry (Paper I) with the loci of these YSOs (within 1.5")meta.numberintF814WF814W Vega magnitudemagphot.mag;em.opt.IfloatSimbadSimbad column added by the CDSchar