J/A+A/569/A20ivo://CDS.VizieR/J/A+A/569/A20doi:10.26093/cds/vizier.35690020CDSMessineo M.Menten K.M.Figer D.F.Davies B.Simon C.J.Ivanov V.D.,Kudritzki R.-P.Michael R.R.MacKenty J.W.Trombley C.2017-06-01T08:52:44Z2014-12-22T12:23:55ZCDS support team

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

cds-question@unistra.frmolecular-cloudsgiant-starsinfrared-photometryYoung massive stars and stellar clusters continuously form in the Galactic disk, generating new HII regions within their natal giant molecular clouds and subsequently enriching the interstellar medium via their winds and supernovae. Massive stars are among the brightest infrared stars in such regions; their identification permits the characterisation of the star formation history of the associated cloud as well as constraining the location of stellar aggregates and hence their occurrence as a function of global environment. We present a stellar spectroscopic survey in the direction of the giant molecular cloud G23.3-0.3. This complex is located at a distance of ~4-5kpc, and consists of several HII regions and supernova remnants. We discovered 11 Of_K_^+^ stars, one candidate luminous blue variable, several OB stars, and candidate red supergiants. Stars with K-band extinction from ~1.3-1.9mag appear to be associated with the GMC G23.3-0.3; O and B-types satisfying this criterion have spectrophotometric distances consistent with that of the giant molecular cloud. Combining near-IR spectroscopic and photometric data allowed us to characterize the multiple sites of star formation within it. The O-type stars have masses from ~25-45M_{sun}_, and ages of 5-8Myr. Two new red supergiants were detected with interstellar extinction typical of the cloud; along with the two RSGs within the cluster GLIMPSE9, they trace an older burst with an age of 20-30Myr. Massive stars were also detected in the core of three supernova remnants - W41, G22.7-0.2, and G22.7583-0.4917. A large population of massive stars appears associated with the GMC G23.3-0.3, with the properties inferred for them indicative of an extended history of stars formation.2014A&A...569A..20Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/569/A20CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/569/A20https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/569/A20http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/569/A20https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/569/A20https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/569/A20http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/569/A20GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/569/A20/early (Spectroscopically detected early-type stars, with infra-red measurements)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/569/A20/early?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/569/A20/early?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/569/A20/early?GETtext/xml+votable180.050000true278.3255833-9.402750.005555555555555556Cone search capability for table J/A+A/569/A20/tablec1 (*List of observed giant stars (L<4x10^4^L_{sun}_)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/569/A20/tablec1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/569/A20/tablec1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/569/A20/tablec1?GETtext/xml+votable180.050000true278.27-9.213250.005555555555555556Cone search capability for table J/A+A/569/A20/supergiant (Red supergiants, with infra-red measurements)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/569/A20/supergiant?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/569/A20/supergiant?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/569/A20/supergiant?GETtext/xml+votable180.050000true278.1500833-9.13430560.0055555555555555566/29532-295338.157980699529898e-21 2.689546822829005e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/569/A20?format=asciiInfrareddefaultJ/A+A/569/A20/earlySpectroscopically detected early-type stars, with infra-red measurementsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDStar identification (1)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainInstInstrument: SINFONI(R=4400) or SofI(R=1900)instrcharSpSpectrum type (2)meta.notecharTeff? Estimated effective temperature (2)Kphys.temperature.effectiveintnullablee_Teff? rms uncertainty on Teff (2)Kstat.error;phys.temperature.effectiveintnullable(J-Ks)0Intrinsic J-Ks colour index (2)magphot.color;em.IR.J;em.IR.Kfloat(H-Ks)0Intrinsic H-Ks colour index (2)magphot.color;em.IR.H;em.IR.KfloatANameOther identification of the starmeta.idcharr_AName[ab] Reference of AName (3)meta.ref;pos.framecharph[cde] Note on the photometry (5)meta.codecharJ2mag? 2MASS J magnitude (6)magphot.mag;em.IR.Jfloatnullablee_J2mag? rms uncertainty on J2magmagstat.error;phot.mag;em.IR.JfloatnullableH2mag? 2MASS H magnitude (6)magphot.mag;em.IR.Hfloatnullablee_H2mag? rms uncertainty on H2magmagstat.error;phot.mag;em.IR.HfloatnullableKs2mag? 2MASS Ks magnitude (6)magphot.mag;em.IR.Kfloatnullablee_Ks2mag? rms uncertainty on Ks2magmagstat.error;phot.mag;em.IR.KfloatnullableImag? DENIS I magnitudemagphot.mag;em.opt.Ifloatnullablee_Imag? rms uncertainty on Imagmagstat.error;phot.mag;em.opt.IfloatnullableJmag? DENIS H magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag? rms uncertainty on Hmagmagstat.error;phot.mag;em.IR.JfloatnullableKsmag? DENIS Ks magnitudemagphot.mag;em.IR.Kfloatnullablee_Ksmag? rms uncertainty on Ksmagmagstat.error;phot.mag;em.IR.KfloatnullableJUmag? UKIDSS J magnitude (7)magphot.mag;em.IR.Jfloatnullablee_JUmag? rms uncertainty on JUmagmagstat.error;phot.magfloatnullableHUmag? UKIDSS H magnitude (7)magphot.mag;em.IR.Hfloatnullablee_HUmag? rms uncertainty on HUmagmagstat.error;phot.magfloatnullableKsUmag? UKIDSS Ks magnitude (7)magphot.mag;em.IR.Kfloatnullablee_KsUmag? rms uncertainty on KsUmagmagstat.error;phot.magfloatnullable[3.6]? GLIMPSE 3.6um magnitudemagphot.mag;em.IR.3-4umfloatnullablee_[3.6]? rms uncertainty on [3.6]magstat.errorfloatnullable[4.5]? GLIMPSE 4.5um magnitudemagphot.mag;em.IR.4-8umfloatnullablee_[4.5]? rms uncertainty on [4.5]magstat.errorfloatnullable[5.8]? GLIMPSE 5.8um magnitudemagphot.flux.density;em.IR.4-8umfloatnullablee_[5.8]? rms uncertainty on [5.8]magstat.errorfloatnullable[8.0]? GLIMPSE 8.0um magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_[8.0]? rms uncertainty on [8.0]magstat.errorfloatnullableAmag? MSX A magnitude (6.8-10.8{mu}m)magphot.flux.density;em.IR.8-15umfloatnullablee_Amag? rms uncertainty on Amagmagstat.error;phot.magfloatnullableW1mag? WISE W1 magnitudemagphot.mag;em.IR.3-4umfloatnullablee_W1mag? rms uncertainty on W1magmagstat.error;phot.magfloatnullableW2mag? WISE W2 magnitudemagphot.mag;em.IR.4-8umfloatnullablee_W2mag? rms uncertainty on W2magmagstat.error;phot.magfloatnullableW3mag? WISE W3 magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_W3mag? rms uncertainty on W3magmagstat.error;phot.magfloatnullableW4mag? WISE W4 magnitudemagphot.flux.density;em.IR.15-30umfloatnullablee_W4mag? rms uncertainty on W4magmagstat.error;phot.magfloatnullableRmag? NOMAD R magnitudemagphot.mag;em.opt.RfloatnullableJ/A+A/569/A20/tablec1*List of observed giant stars (L<4x10^4^L_{sun}_InstInstrumentmeta.id;instrcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[49/151] Identification numbermeta.id;meta.mainintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainEW(CO)CO Equivalent width0.1nmspect.line.eqWidth;em.line.COintSp.gSpectral type obtained using the relation for giantssrc.spTypecharl_Te.gLimit flag on TeffGmeta.code.errorcharTe.g? Effective temperature obtained using the relation for giants (1)Kphys.temperature.effectiveintnullablee_Te.g? rms uncertainty on T.gKstat.errorintnullableH2O? H_2_O index%meta.code;spect.index;arith.ratiointnullableRemRemarks (alternative designations and notes)meta.notecharr_RemReference (2)meta.ref;pos.framecharJ/A+A/569/A20/supergiantRed supergiants, with infra-red measurementse_Te.g? rms uncertainty on Te.gKstat.errorintnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDSupergiant identification (1)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainInstInstrument: SINFONI(R=4400) or SofI(R=1900)instrcharEW(CO)? CO Equivalent width (2.29{mu}m)0.1nmspect.line.eqWidth;em.line.COintnullableSp.gSpectral type obtained using the relation for red giantssrc.spTypecharTe.g? Effective temperature obtained using the relation for red giants (2)Kphys.temperature.effectiveintnullableSp.cSpectral type obtained using the relation for supergiantssrc.spTypecharTe.c? Effective temperature obtained using the relation for supergiants (2)Kphys.temperature.effectiveintnullablee_Te.c? rms uncertainty on Te.cKstat.errorintnullableH2O? H_2_O index (3)%meta.code;spect.index;arith.ratiointnullableANameOther identification of the starmeta.idcharr_AName[abc] Reference or note (4)meta.ref;pos.framecharph[cde] Note on the photometry (5)meta.codecharJ2mag? 2MASS J magnitude (6)magphot.mag;em.IR.Jfloatnullablee_J2mag? rms uncertainty on J2magmagstat.error;phot.mag;em.IR.JfloatnullableH2mag? 2MASS H magnitude (6)magphot.mag;em.IR.Hfloatnullablee_H2mag? rms uncertainty on H2magmagstat.error;phot.mag;em.IR.HfloatnullableKs2mag? 2MASS Ks magnitude (6)magphot.mag;em.IR.Kfloatnullablee_Ks2mag? rms uncertainty on Ks2magmagstat.error;phot.mag;em.IR.KfloatnullableImag? DENIS I magnitudemagphot.mag;em.opt.Ifloatnullablee_Imag? rms uncertainty on Imagmagstat.error;phot.mag;em.opt.IfloatnullableJmag? DENIS H magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag? rms uncertainty on Hmagmagstat.error;phot.mag;em.IR.JfloatnullableKsmag? DENIS Ks magnitudemagphot.mag;em.IR.Kfloatnullablee_Ksmag? rms uncertainty on Ksmagmagstat.error;phot.mag;em.IR.KfloatnullableJUmag? UKIDSS J magnitude (7)magphot.mag;em.IR.Jfloatnullablee_JUmag? rms uncertainty on JUmagmagstat.error;phot.magfloatnullableHUmag? UKIDSS H magnitude (7)magphot.mag;em.IR.Hfloatnullablee_HUmag? rms uncertainty on HUmagmagstat.error;phot.magfloatnullableKsUmag? UKIDSS Ks magnitude (7)magphot.mag;em.IR.Kfloatnullablee_KsUmag? rms uncertainty on KsUmagmagstat.error;phot.magfloatnullable[3.6]? GLIMPSE 3.6um magnitudemagphot.mag;em.IR.3-4umfloatnullablee_[3.6]? rms uncertainty on [3.6]magstat.errorfloatnullable[4.5]? GLIMPSE 4.5um magnitudemagphot.mag;em.IR.4-8umfloatnullablee_[4.5]? rms uncertainty on [4.5]magstat.errorfloatnullable[5.8]? GLIMPSE 5.8um magnitudemagphot.flux.density;em.IR.4-8umfloatnullablee_[5.8]? rms uncertainty on [5.8]magstat.errorfloatnullable[8.0]? GLIMPSE 8.0um magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_[8.0]? rms uncertainty on [8.0]magstat.errorfloatnullableAmag? MSX A magnitude (6.8-10.8{mu}m)magphot.flux.density;em.IR.8-15umfloatnullablee_Amag? rms uncertainty on Amagmagstat.error;phot.magfloatnullableW1mag? WISE W1 magnitudemagphot.mag;em.IR.3-4umfloatnullablee_W1mag? rms uncertainty on W1magmagstat.error;phot.magfloatnullableW2mag? WISE W2 magnitudemagphot.mag;em.IR.4-8umfloatnullablee_W2mag? rms uncertainty on W2magmagstat.error;phot.magfloatnullableW3mag? WISE W3 magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_W3mag? rms uncertainty on W3magmagstat.error;phot.magfloatnullableW4mag? WISE W4 magnitudemagphot.flux.density;em.IR.15-30umfloatnullablee_W4mag? rms uncertainty on W4magmagstat.error;phot.magfloatnullableRmag? NOMAD R magnitudemagphot.mag;em.opt.Rfloatnullable