J/A+A/584/A5ivo://CDS.VizieR/J/A+A/584/A5doi:10.26093/cds/vizier.35840005CDSEvans C.J.van Loon J.T.Hainich R.Bailey M.2017-09-15T14:55:40Z2015-11-13T08:09:59ZCDS support team

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

cds-question@unistra.frmagellanic-cloudsb-starsspectroscopic-binary-starsWe present spectral classifications from optical spectroscopy of 263 massive stars in the north-eastern region of the Large Magellanic Cloud. The observed two-degree field includes the massive 30 Doradus star-forming region, the environs of SN1987A, and a number of star-forming complexes to the south of 30 Dor. These are the first classifications for the majority (203) of the stars and include eleven double-lined spectroscopic binaries. The sample also includes the first examples of early OC-type spectra (AAOmega 30 Dor 248 and 280), distinguished by the weakness of their nitrogen spectra and by CIV {lambda}4658 emission. We propose that these stars have relatively unprocessed CNO abundances compared to morphologically normal O-type stars, indicative of an earlier evolutionary phase. From analysis of observations obtained on two consecutive nights, we present radial-velocity estimates for 233 stars, finding one apparent single-lined binary and nine (>3{sigma}) outliers compared to the systemic velocity; the latter objects could be runaway stars or large-amplitude binary systems and further spectroscopy is required to investigate their nature.2015A&A...584A...5Ehttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/584/A5CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/128/1606 : Magellanic Clouds Photometric Survey: the LMC (Zaritsky+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/584/A5https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/584/A5http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/584/A5https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/584/A5https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/584/A5http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/584/A5GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/584/A5/table2 (Observational parameters of target stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/584/A5/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/584/A5/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/584/A5/table2?GETtext/xml+votable180.050000true81.8889167-69.02277780.0055555555555555566/33091 33094-33095 33097 33100-331012.367228618189496e-19 6.118840631666147e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/584/A5?format=asciidefaultJ/A+A/584/A5/table2Observational parameters of target starsSimbadNameSimbad column added by the CDSmeta.idcharBinBinary statusmeta.codecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintsp1spectrum at 4375{AA}meta.ref.urlcharsp2spectrum at 4100+4700{AA}meta.ref.urlcharAAOAAOmega star numbermeta.idintRAJ2000Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainSpTypeMK spectral classificationsrc.spTypecharRV1? Primary velocitykm/sphys.veloc;pos.heliocentricfloatnullablee_RV1? rms uncertainty on RV1km/sstat.errorfloatnullableo_RV1? Number of measurements for RV1meta.numberintnullableRV2? Secondary velocitykm/sphys.veloc;pos.heliocentricfloatnullablee_RV2? rms uncertainty on RV2km/sstat.errorfloatnullableo_RV2? Number of measurements for RV2meta.numberintnullableONamesOther name(s) (1)meta.id;meta.maincharFile1Display the 4375 spectrum tablemeta.ref.urlcharFile2Display the 4100+4700 spectrum tablemeta.ref.urlcharJ/A+A/584/A5/table3MCPS photometry of target stars (Zaritsky et al., 2004, Cat. J/AJ/128/1606)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintAAOAAOmega star numbermeta.idintUmagJohnson U magnitudemagphot.mag;em.opt.UfloatBmagJohnson B magnitudemagphot.mag;em.opt.BfloatVmagJohnson V magnitudemagphot.mag;em.opt.VfloatIcmagCousins I magnitudemagphot.mag;em.opt.IfloatU-BJohnson U-B colour indexmagphot.color;em.opt.U;em.opt.BfloatB-BJohnson B-V colour indexmagphot.color;em.opt.B;em.opt.VfloatV-IcJohnson-Cousins V-I colour indexmagphot.color;em.opt.V;em.opt.IfloatJ/A+A/584/A5/table4Comparison of AAOmega classifications with those available in the literaturerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintAAOAAOmega star numbermeta.idintANameAlias namemeta.idcharSpTypeAAOmega MK spectral classificationsrc.spTypecharSpTypePPublished MK spectral classification(s) (1)meta.ref;src.spTypechar