J/A+A/648/A34ivo://CDS.VizieR/J/A+A/648/A34doi:10.26093/cds/vizier.36480034CDSPreibisch T.Flaischlen S.Goeppl C.Ercolano B.Roccatagliata V.2021-07-05T09:06:36Z2021-04-07T10:51:29ZCDS support team

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

cds-question@unistra.frstellar-associationso-starsspectroscopyinfrared-astronomyThe Carina Nebula harbors a large population of high-mass stars, including at least 75 O-type and Wolf-Rayet (WR) stars, but the current census is not complete since further high-mass stars may be hidden in or behind the dense dark clouds that pervade the association. With the aim of identifying optically obscured O- and early B-type stars in the Carina Nebula, we performed the first infrared spectroscopic study of stars in the optically obscured stellar cluster Tr 16-SE, located behind a dark dust lane south of {eta} Car. We used the integral-field spectrograph KMOS at the ESO VLT to obtain H- and K-band spectra with a resolution of R~4000 ({Delta}{lambda}~5{AA}) for 45 out of the 47 possible OB candidate stars in Tr 16-SE, and we derived spectral types for these stars. We find 15 stars in Tr 16-SE with spectral types between O5 and B2 (i.e. high-mass stars with M>=8M_{sun}_), only two of which were known before. An additional nine stars are classified as (Ae)Be stars, i.e. intermediate-mass pre-main sequence stars, and most of the remaining targets show clear signatures of being late-type stars and are thus most likely foreground stars or background giants unrelated to the Carina Nebula. Our estimates of the stellar luminosities suggest that nine of the 15 O- and early B-type stars are members of Tr 16-SE, whereas the other six seem to be background objects. Our study increases the number of spectroscopically identified high-mass stars (M>=8M_{sun}_) in Tr 16-SE from two to nine and shows that Tr 16-SE is one of the larger clusters in the Carina Nebula. Our identification of three new stars with spectral types between O5 and O7 and four new stars with spectral types O9 to B1 significantly increases the number of spectroscopically identified O-type stars in the Carina Nebula.2021A&A...648A..34Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/648/A34CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/350 : Gaia EDR3 (Gaia Collaboration, 2020)II/341 : VPHAS+ DR2 survey (Drew+, 2016)III/274 : Galactic O-Star Spectroscopic Survey (GOSSS) (Sota+, 2014)J/AJ/105/980 : Stellar content of Tr 14 and Tr 16 (Massey+ 1993)J/ApJS/194/2 : Chandra Carina Complex Project (CCCP) catalog (Broos+, 2011)J/A+A/572/A116 : The VISTA Carina Nebula Survey (Preibisch+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/648/A34https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/648/A34http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/648/A34https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/648/A34https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/648/A34http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/648/A34GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/648/A34/table1 (List of the KMOS spectra for standard stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/648/A34/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/648/A34/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/648/A34/table1?GETtext/xml+votable180.050000true161.174-59.782305560.005555555555555556Cone search capability for table J/A+A/648/A34/table3 (List of the KMOS spectra for target stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/648/A34/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/648/A34/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/648/A34/table3?GETtext/xml+votable180.050000true161.19772083-59.7492250.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/648/A346/380167.952274030004205e-20 1.7798557115773645e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/648/A34?format=asciiInfrareddefaultJ/A+A/648/A34/table1List of the KMOS spectra for standard starsSimbadNameSimbad column added by the CDSmeta.idcharNameObject namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainspKShow the spectrummeta.ref.urlcharspHShow the spectrummeta.ref.urlcharHspH-spectrum filename in subdirectory spectrummeta.id;meta.filecharKspK-spectrum filename in subdirectory spectrummeta.id;meta.filecharGmag? Optical magnitude (1)magphot.mag;em.optfloatnullableJmag? J-band magnitude (2)magphot.mag;em.IR.JfloatnullableHmag? H-band magnitude (2)magphot.mag;em.IR.HfloatnullableKsmag? Ks-band magnitude (2)magphot.mag;em.IR.KfloatnullableCCCPCCCP match, HHMMSS.ss+DDMMSS.s, CXOGNC JHHMMSS.ss+DDMMSS.s, in Simbad (3)meta.idcharSpType1Spectral type from Smith (2006MNRAS.367..763S)src.spTypecharSpType2Spectral type from Sota et al. (2014ApJS..211...10S, Cat. III/274)src.spTypecharSpType3Spectral type from Massey & Johnson (1993AJ....105..980M, Cat. J/AJ/105/980)src.spTypecharJ/A+A/648/A34/table3List of the KMOS spectra for target starsSimbadNameSimbad column added by the CDSmeta.idcharJmag? J-band magnitude (2)magphot.mag;em.IR.JfloatnullableHmag? H-band magnitude (2)magphot.mag;em.IR.HfloatnullableKsmag? Ks-band magnitude (2)magphot.mag;em.IR.KfloatnullableKspK-spectrum filename in subdirectory spectrummeta.id;meta.filecharmag? Optical magnitude according to column Bandmagphot.magfloatnullableBand[Gri-] G if available, r or i otherwise (1)instr.bandpasscharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameObject namemeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainspKShow the spectrummeta.ref.urlcharspHShow the spectrummeta.ref.urlcharHspH-spectrum filename in subdirectory spectrummeta.id;meta.filecharCCCPCCCP match, HHMMSS.ss+DDMMSS.s, CXOGNC JHHMMSS.ss+DDMMSS.s, in Simbad (3)meta.idcharSpTypeSpectral type of the objectsrc.spTypecharComCommentmeta.notechar