J/ApJ/696/1278ivo://CDS.VizieR/J/ApJ/696/1278doi:10.26093/cds/vizier.16961278CDSPovich M.S.Churchwell E.Bieging J.H.Kang M.Whitney B.A.,Brogan C.L.Kulesa C.A.Cohen M.Babler B.L.Indebetouw R.Meade M.R.,Robitaille T.P.2017-12-15T10:55:38Z2011-05-18T09:15:55ZCDS support team

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

cds-question@unistra.frh-ii-regionsinfrared-photometrystellar-spectral-typesob-starsyoung-stellar-objectsx-ray-sourcesM17 is one of the youngest and most massive nearby star-formation regions in the Galaxy. It features a bright HII region erupting as a blister from the side of a giant molecular cloud (GMC). Combining photometry from the Spitzer Galactic Legacy Infrared Mid-Plane Survey Extraordinaire (GLIMPSE) with complementary infrared (IR) surveys, we identify candidate young stellar objects (YSOs) throughout a 1.5x1{deg} field that includes the M17 complex. The long sightline through the Galaxy behind M17 creates significant contamination in our YSO sample from unassociated sources with similar IR colors. Removing contaminants, we produce a highly reliable catalog of 96 candidate YSOs with a high probability of association with the M17 complex. We fit model spectral energy distributions to these sources and constrain their physical properties. Extrapolating the mass function of 62 intermediate-mass YSOs (M_*_>3M_{sun}_), we estimate that >1000 stars are in the process of forming in the extended outer regions of M17. The remaining 34 candidate YSOs are found in a 0.17deg^2^ field containing the well-studied M17 HII region and photodissociation region (PDR), where bright diffuse mid-IR emission drastically reduces the sensitivity of the GLIMPSE point-source detections.2009ApJ...696.1278Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/696/1278CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/293 : GLIMPSE Source Catalog (I + II + 3D) (IPAC 2008)V/114 : MSX6C Infrared Point Source Catalog (Egan+ 2003)V/112 : Catalog of Star-Forming Regions in the Galaxy (Avedisova, 2002)J/ApJ/658/1264 : IR-excess sources in GLIMPSE and MSX (Uzpen+, 2007)J/ApJS/169/353 : Chandra sources in M17 (Broos+, 2007)J/A+A/392/971 : Catalogue of bright YSO candidates in ISOGAL (Felli+, 2002)http://www.astro.wisc.edu/glimpse/docs.html : GLIMPSE documents onlinehttp://irsa.ipac.caltech.edu/applications/Gator : Spitzer and MSX publichttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/696/1278https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/696/1278http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/696/1278https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/696/1278https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/696/1278http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/696/1278GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/696/1278/table2 (Candidate YSOs in the extended environment of M17)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/696/1278/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/696/1278/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/696/1278/table2?GETtext/xml+votable180.050000true274.773412-16.3794180.005555555555555556Cone search capability for table J/ApJ/696/1278/table3 (Other candidate clustered YSOs in the M17 target field)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/696/1278/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/696/1278/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/696/1278/table3?GETtext/xml+votable180.050000true274.785269-16.5378060.005555555555555556Cone search capability for table J/ApJ/696/1278/table4 (Candidate YSOs in the region observed by Chandra)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/696/1278/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/696/1278/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/696/1278/table4?GETtext/xml+votable180.050000true275.073975-16.2345750.005555555555555556Cone search capability for table J/ApJ/696/1278/table5 (Selected OB stars associated with M17)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/696/1278/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/696/1278/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/696/1278/table5?GETtext/xml+votable180.050000true275.12437-16.1792620.0055555555555555566/29113 29115 29116 29118 29119 294572.0616683193919197e-20 4.923046907857898e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/696/1278?format=asciiX-rayOpticalInfrareddefaultJ/ApJ/696/1278/table2Candidate YSOs in the extended environment of M17recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldM17 field (1)meta.id;obs.fieldchar[PCB2009]Star designation (ENN)meta.id;meta.maincharf_[PCB2009][bc] Flag on [PCB2009] (2)meta.codecharGLONGalactic longitude in decimal degrees (J2000)degpos.galactic.lonGLATGalactic latitude in decimal degrees (J2000)degpos.galactic.lat4.5magSpitzer/IRAC 4.5um band magnitudemagphot.mag;em.IR.4-8umfloatl_8magLimit flag on 8magmeta.code.errorchar8mag? Spitzer/IRAC 8.0um band magnitudemagphot.flux.density;em.IR.8-15umfloatnullablel_24magLimit flag on 24magmeta.code.errorchar24mag? Spitzer/IRAC 24um band magnitudemagphot.mag;em.IR.15-30umfloatnullableM*minMinimum stellar masssolMassphys.massfloatM*maxMaximum stellar masssolMassphys.massintlogLminMinimum L_tot_ (total bolometric luminosity, including luminosity produced by accretion)log(solLum)phys.luminosityfloatlogLmaxL_tot_ maximumlog(solLum)phys.luminosityfloatStageEvolutionary stage (3)src.classcharGLIMPSEDetails from the GLIMPSE catalog (IPAC 2008, Cat. II/293)meta.ref.urlchar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)degpos.eq.decnullableindexedJ/ApJ/696/1278/table3Other candidate clustered YSOs in the M17 target fieldrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[PCB2009]Index number (FNNN) (1)meta.id;meta.maincharf_[PCB2009][b] Flag on [PCB2009] (2)meta.codecharGLONGalactic longitude in decimal degrees (J2000)degpos.galactic.lonGLATGalactic latitude in decimal degrees (J2000)degpos.galactic.latl_4.5magLimit flag on 4.5magmeta.code.errorchar4.5mag? Spitzer/IRAC 4.5um magnitudemagphot.mag;em.IR.4-8umfloatnullablel_8magLimit flag on 8magmeta.code.errorchar8mag? Spitzer/IRAC 8.0um magnitudemagphot.flux.density;em.IR.8-15umfloatnullablel_24magLimit flag on 24magmeta.code.errorchar24magSpitzer/IRAC 24um magnitudemagphot.mag;em.IR.15-30umfloatGroupM17 group (3)meta.id.parentcharGLIMPSEDetails from the GLIMPSE catalog (IPAC 2008, Cat. II/293)meta.ref.urlchar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)degpos.eq.decnullableindexedJ/ApJ/696/1278/table4Candidate YSOs in the region observed by ChandraStageEvolutionary stage (3)src.classcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[PCB2009]Index number (XNN or NXNN) (1)meta.id;meta.maincharf_[PCB2009][b-f] Flag on [PCB2009] (2)meta.codecharGLONGalactic longitude in decimal degrees (J2000)degpos.galactic.lonGLATGalactic latitude in decimal degrees (J2000)degpos.galactic.latl_4.5magLimit flag on 4.5magmeta.code.errorchar4.5mag? Spitzer/IRAC 4.5um magnitudemagphot.mag;em.IR.4-8umfloatnullable8mag? Spitzer/IRAC 8.0um magnitudemagphot.flux.density;em.IR.8-15umfloatnullableM*minMinimum stellar masssolMassphys.massfloatM*maxMaximum stellar masssolMassphys.massintlogLminMinimum L_tot_ (total bolometric luminosity, including luminosity produced by accretion)log(solLum)phys.luminosityfloatlogLmaxL_tot_ maximumlog(solLum)phys.luminosityfloatGLIMPSEDetails from the GLIMPSE catalog (IPAC 2008, Cat. II/293)meta.ref.urlchar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)degpos.eq.decnullableindexedJ/ApJ/696/1278/table5Selected OB stars associated with M17SimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintOTypeObject type (1)src.classchar[PCB2009]Index number (2)meta.id;meta.maincharf_[PCB2009][dfgh] Flag on [PCB2009] (3)meta.codecharONameAlternative name (4)meta.idcharGLONGalactic longitude in decimal degrees (J2000)degpos.galactic.lonGLATGalactic latitude in decimal degrees (J2000)degpos.galactic.latSpTcatCataloged MK spectral type (5)src.spTypecharSpT1.6MK spectral type from SED with d=1.6kpcsrc.spTypecharSpT2.1MK spectral type from SED with d=2.1kpcsrc.spTypecharf_SpT2.1[e] Flag on SpT2.1 (6)meta.codecharu_Av[~] Approximative symbol for Avmeta.code.errorcharAv? Extinction valuemagphys.absorptionfloatnullableGLIMPSEDetails from the GLIMPSE catalog (IPAC 2008, Cat. II/293)meta.ref.urlchar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)degpos.eq.decnullableindexed