J/A+A/578/A109ivo://CDS.VizieR/J/A+A/578/A109doi:10.26093/cds/vizier.35780109CDSMartins F.Simon-Diaz S.Palacios A.Howarth I.Georgy C.Walborn N.,Bouret J.-C.Barba R.2017-09-27T05:55:39Z2015-06-12T09:04:35ZCDS support team

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

cds-question@unistra.fro-starsmultiple-starsspectroscopyMassive stars burn hydrogen through the CNO cycle during most of their evolution. When mixing is efficient or when mass transfer in binary systems occurs, chemically processed material is observed at the surface of O and B stars. ON stars show stronger lines of nitrogen than morphologically normal counterparts. Whether this corresponds to the presence of material processed through the CNO cycle is not known. Our goal is to answer this question. We performed a spectroscopic analysis of a sample of ON stars with atmosphere models. We determined the fundamental parameters as well as the He, C, N, and O surface abundances. We also measured the projected rotational velocities. We compared the properties of the ON stars to those of normal O stars.2015A&A...578A.109Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/578/A109CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIII/274 : Galactic O-Star Spectroscopic Survey (Sota+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/578/A109https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/578/A109http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/578/A109https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/578/A109https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/578/A109http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/578/A109GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/578/A109/stars (Observational information)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/578/A109/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/578/A109/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/578/A109/stars?GETtext/xml+votable180.050000true30.625541755.6240.0055555555555555566/2409 3247 3585 13255 14743 14793 22211 37334 37907 41592 41702 42228https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/578/A109?format=asciiOpticaldefaultJ/A+A/578/A109/starsObservational informationrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHDStar number in HD cataloguemeta.id;meta.mainintspShow the spectrummeta.ref.urlcharRAJ2000Simbad right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainSpTypeMK spectral type (1)src.spTypecharInstInstrument (2)meta.id;instrcharDateDate of observation, or blank for "average"time.epochnullableFileNameName of the spectrum file in subdirectory spmeta.id;meta.filecharSimbadSimbad column added by the CDSmeta.ref.urlchar