J/A+AS/131/469ivo://CDS.VizieR/J/A+AS/131/469CDSMiroshnichenko A.S.Fremat Y.Houziaux L.Andrillat Y.Chentsov E.L.,Klochkova V.G.1998-11-26T13:42:47Z1998-11-26T14:42:35ZCDS support team

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

cds-question@unistra.fremission-line-starsline-intensitiesradial-velocityspectroscopyThe results of high-resolution optical spectroscopy obtained for a recently suggested LBV (luminous blue variable) candidate, MWC 314, are presented. Photospheric lines mostly of N II and S II have been found for the first time with a resolution of 0.4-0.8{AA}. They imply a N/O overabundance previously reported for AG and HR Car since no O II absorptions were detected. Nearly 400 emission lines have been identified in the spectrum between 4190 and 8864{AA} many of which appear double-peaked. No significant P Cygni type absorption components have been found for the optically thick Balmer lines. This suggests that the stellar wind of MWC 314 is non-spherical and the circumstellar envelope is viewed not edge on. The systemic velocity measured using the emission lines of ionized metals turned out to be 55km/s, which corresponds to a distance towards the object of 3.0+/-0.2kpc, according to the galactic rotation curve. Our analysis of the characteristics of both photospheric and wind lines resulted in an estimate of the object's T_eff_ of nearly 25000K, which, however, needs further improvement. The other stellar parameters were found to be as follows: Log(L_bol_/L_{sun}_)=6.1+/-0.3, R_star_=60^+30^_=10_R_{sun}_. Our study confirms that MWC 314 is one of the most luminous stars in the Milky Way.1998A&AS..131..469Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/131/469CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/131/469https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/131/469http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/131/469https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+AS/131/469https://vizier.iucaa.in/viz-bin/votable?-source=J/A+AS/131/469http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+AS/131/469GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+AS/131/469/table1Emission lines identified in MWC 314 optical spectrumIdentLine identifications (2)meta.idcharn_IFluxNote on IFlux (4)meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLambdaObsObserved wavelength0.1nmem.wlfloatn_LambdaObs[*:] Note on lines (1)meta.notecharIPeak? Peak Intensity for spectrum normalized at the continuumspect.line.intensityfloatnullableu_IPeakUncertainty flag on IPeak (3)meta.code.errorcharl_EWLimit flag on EWmeta.code.errorcharEW? Equivalent width0.1nmspect.line.eqWidthfloatnullableu_EWUncertainty flag on EWmeta.code.errorcharn_EWNote on EW (4)meta.notecharRV? Radial velocitykm/sphys.veloc;pos.heliocentricintnullableu_RVUncertainty flag on RV (3)meta.code.errorcharl_IFluxLimit flag on IFluxmeta.code.errorcharIFlux? Integrated flux1e-16mW.m**-2phot.flux.density;em.optdoublenullableJ/A+AS/131/469/table2Absorption lines identified in MWC 314 optical spectrumrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLambdaObsObserved wavelength0.1nmem.wlfloatIdentLine identificationsmeta.idcharIPeak? Peak intensity for spectrum normalized at the continuumphot.flux.density;arith.ratiofloatnullableu_IPeakUncertainty flag on IPeak (1)meta.code.errorcharl_EWLimit flag on EWmeta.code.errorcharEW? Equivalent width0.1nmspect.line.eqWidthfloatnullablen_EWNote on EW (2)meta.notecharRV? Radial velocitykm/sphys.veloc;pos.heliocentricintnullableu_RVUncertainty flag on RV (1)meta.code.errorcharJ/A+AS/131/469/table3Diffuse interstellar absorption features identifiedLambdaObsObserved wavelength0.1nmem.wlfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_LambdaObs[a] a: Na Imeta.notecharIPeakPeak Intensity for spectrum normalized at the continuumphot.flux.density;arith.ratiofloatu_IPeakUncertainty flag on IPeak (1)meta.code.errorcharl_EWLimit flag on EWmeta.code.errorcharEW? Equivalent width0.1nmspect.line.eqWidthfloatnullableu_EWUncertainty flag on EW (1)meta.code.errorcharn_EWNote on EW (2)meta.notecharRV? Radial velocitykm/sphys.veloc;pos.heliocentricintnullableu_RVUncertainty flag on EW (1)meta.code.errorchar