J/A+A/588/A10ivo://CDS.VizieR/J/A+A/588/A10doi:10.26093/cds/vizier.35880010CDSRaucq F.Rauw G.Gosset E.Naze Y.Mahy L.Herve A.Martins F.2016-03-10T07:36:34Z2016-03-10T08:22:23ZCDS support team

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

cds-question@unistra.frspectroscopic-binary-starssupergiant-starsspectroscopyMass and momentum exchanges in close massive binaries play an important role in their evolution, and produce several observational signatures such as asynchronous rotation and altered chemical compositions, that remain after the stars detach again. We investigated these effects for the detached massive O-star binary HD 149404 (O7.5 If + ON9.7 I, P=9.81-days), which is thought to have experienced a past episode of case A Roche-lobe overflow (RLOF). Using phase-resolved spectroscopy, we performed the disentangling of the optical spectra of the two stars. The reconstructed primary and secondary spectra were then analysed with the CMFGEN model atmosphere code to determine stellar parameters, such as the effective temperatures and surface gravities, and to constrain the chemical composition of the components. We complemented the optical study with the study of IUE spectra, which we compare to the synthetic binary spectra. The properties of the stars were compared to evolutionary models.2016A&A...588A..10Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/588/A10CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/588/A10https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/588/A10http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/588/A10https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/588/A10https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/588/A10http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/588/A10GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/588/A10/table6List of the spectra of HD 149404recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDDate of the observation (HJD-2400000)time.epochdoubleInstName of the observing instrumentmeta.id;instrcharPhasePhase of the observationtime.phasefloatlambdalLower value of wavelength interval0.1nmem.wlintlambdauUpper value of wavelength interval0.1nmem.wlintFileNameName of the associated FITS spectrum in subdirectory sp (1)meta.id;meta.fitscharspShow the spectrummeta.ref.urlchar