J/A+A/307/869ivo://CDS.VizieR/J/A+A/307/869doi:10.26093/cds/vizier.33070869CDSBakker E.J.Lamers H.J.G.L.M.Waters L.B.F.M.Waelkens C.,Trams N.R.van Winckel H.1997-12-09T16:39:43Z1997-12-09T17:39:39ZCDS support team

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

cds-question@unistra.frspectroscopyultraviolet-astronomyWe present a study of low- and high-resolution ultraviolet, high-resolution optical CAT/CES spectra and ultraviolet, optical and infrared photometry of the peculiar supergiant HD 101584. From the photometry we learn that the ultraviolet and optical energy distribution cannot be fitted in a consistent way and we need a model in which the UV and optical energy distribution are formed by different gas. The Geneva photometry is best fitted to a B9II Kurucz model, T_eff_=12000+/-1000K and logg=3.0+/-1.0, with an extinction of E(B-V)=0.49+/-0.05. The observed spectral features in the spectrum of HD 101584 are classified in eight different categories based on the velocity, shape of profile and the identification. The high-excitation HeI ({chi}=20.87eV), NII ({chi}=18.40eV), CII ({chi}=14.39eV) and NI ({chi}=10.29eV) optical absorption lines are formed in the photosphere of a late B-star (e.g. B8-9I-II). These absorption lines show radial velocity variations which are attributed to binary motion, with the secondary being a white dwarf or a low-mass main sequence object. The low-excitation P-Cygni lines in the optical and UV are formed in the wind. The number density of absorption lines in the UV is so large that the wind spectrum acts as an iron curtain in front of the B-star. The terminal velocity of the wind of v_{infinity}_=100+/-30km/s is consistent with the star being a low-mass post-AGB star and the low effective gravity is attributed to the presence of a nearby, unseen, secondary. We estimate a mass-loss rate of M{dot}=~10^-8^M_{sun}_/yr. Narrow absorption and emission lines are observed which are formed in a circumsystem disk with a typical radius of 10^2^R_*_.1996A&A...307..869Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/307/869CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/307/869https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/307/869http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/307/869https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/307/869https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/307/869http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/307/869GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapUVdefaultJ/A+A/307/869/table1419 selected UV FeII absorption lines of HD 101584 and alpha LeprecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLamLabLaboratory wavelength0.1nmem.wl;phys.atmol.transitiondoubleMultipletMultiplet numberphys.atmol.levelintChiLower level excitation energy of the transitioneVphys.energy;phys.atmol.excitationfloatlog(gf)The oscillator strength of the transitionphys.atmol.wOscStrengthfloatHRV1Radial heliocentric velocity of the absorption feature of HD 101584 (High-resolution ultraviolet spectrum LWP17369) (1)km/sphys.veloc;pos.heliocentricintHRV2[]? Radial heliocentric velocity of the absorption feature of HD 101584 (High-resolution ultraviolet spectrum LWR04822) (1)km/sphys.veloc;pos.heliocentricintHRV3Radial heliocentric velocity of the absorption feature of the comparison star {alpha} Lep (High-resolution ultraviolet spectrum LWR3236) (1)km/sphys.veloc;pos.heliocentricintJ/A+A/307/869/table15The optical spectrum of HD 101584RemarkRemarkmeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLamOMinimum value observed wavelengthnmem.wlfloatSep1[-] Interval separation signmeta.notecharLam1Maximum value observed wavelengthnmem.wl.effectivefloatDateDate of observationtime.epochMultipletElement and multiplet numberphys.atmol.levelcharLamLab[]? Laboratory wavelength0.1nmem.wl;phys.atmol.transitiondoubleChi1[]? Lower level excitation energy, first valueeVphys.energy;phys.atmol.excitationfloatSep2[-] Interval separation signmeta.notecharChi2[]? Lower level excitation energy, second valueeVphys.energy;phys.atmol.excitationfloatlog(gf)[]? Oscillator strengthphys.atmol.wOscStrengthfloatLamObsObserved wavelength0.1nmem.wlfloatHRV(I)[]? Radial heliocentric velocity for the identified absorption feature: Type Ikm/sphys.veloc;pos.heliocentricintu_HRV(I)[:] Uncertainty flag on HRV(I)meta.code.errorcharHRV(II)[]? Radial heliocentric velocity for the identified absorption feature: Type IIkm/sphys.veloc;pos.heliocentricintu_HRV(II)[:] Uncertainty flag on HRV(II)meta.code.errorcharHRV(III)[]? Radial heliocentric velocity for the identified absorption feature: Type IIIkm/sphys.veloc;pos.heliocentricintu_HRV(III)[:] Uncertainty flag on HRV(III)meta.code.errorcharHRV(IV)[]? Radial heliocentric velocity for the identified absorption feature: Type IVkm/sphys.veloc;pos.heliocentricintHRV(V)[]? Radial heliocentric velocity for the identified emission feature: Type Vkm/sphys.veloc;pos.heliocentricintu_HRV(V)[:] Uncertainty flag on HRV(V)meta.code.errorcharHRV(VI)[]? Radial heliocentric velocity for the identified emission feature: Type VIkm/sphys.veloc;pos.heliocentricintu_HRV(VI)[:] Uncertainty flag on HRV(VI)meta.code.errorcharEW[]? Observed equivalent widthpmspect.line.eqWidthfloatDepth[]? Depth of the central absorption relative to the continuum%phot.flux.density;arith.ratioint