J/A+A/565/A27ivo://CDS.VizieR/J/A+A/565/A27doi:10.26093/cds/vizier.35650027CDSHainich R.Ruehling U.Todt H.Oskinova L.M.Liermann A.Graefener G.,Foellmi C.Schnurr O.Hamann W.-R.2026-01-13T19:47:26Z2014-09-09T11:42:54ZCDS support team

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

cds-question@unistra.frmagellanic-cloudswolf-rayet-starsMassive stars, although being important building blocks of galaxies, are still not fully understood. This especially holds true for Wolf-Rayet (WR) stars with their strong mass loss, whose spectral analysis requires adequate model atmospheres. Following our comprehensive studies of the WR stars in the Milky Way, we now present spectroscopic analyses of almost all known WN stars in the LMC. For the quantitative analysis of the wind-dominated emission-line spectra, we employ the Potsdam Wolf-Rayet (PoWR) model atmosphere code. By fitting synthetic spectra to the observed spectral energy distribution and the available spectra (ultraviolet and optical), we obtain the physical properties of 107 stars. We present the fundamental stellar and wind parameters for an almost complete sample of WN stars in the LMC. Among those stars that are putatively single, two different groups can be clearly distinguished. While 12% of our sample are more luminous than 10^6^L_{sun}_ and contain a significant amount of hydrogen, 88% of the WN stars, with little or no hydrogen, populate the luminosity range between log(L/L_{sun}_)=5.3...5.8.2014A&A...565A..27Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/565/A27CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/565/A27https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/565/A27http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/565/A27https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/565/A27https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/565/A27http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/565/A27GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/565/A27/sample (LMC WN stars parameters (table2), and number of ionizing photons and Zanstra temperatures (tablea3))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/565/A27/sample?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/565/A27/sample?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/565/A27/sample?GETtext/xml+votable180.050000true71.3844686-70.25302580.0055555555555555565/8269 8274 6/33051-33053 33075 33091 33094 33100-33102 33107 33112-33113 33115 33120 33122-33123 33126https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/565/A27?format=asciidefaultJ/A+A/565/A27/sampleLMC WN stars parameters (table2), and number of ionizing photons and Zanstra temperatures (tablea3)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBAT99BAT99 identification number (Breysacher, Azzopardi and Testor, 1999A&AS..137..117B)meta.id;meta.mainintfigImage of the spectrum (on-line figure)meta.ref.urlcharSpTypeSpectral typesrc.spTypecharr_SpTypeReference for SpType (2)meta.ref;pos.framecharT*Stellar (effective) temperaturekKphys.temperatureintlogRttransformed radiuslog(solRad)phys.size.radiusfloatVinfTerminal wind velocity V_{infty}_km/sphys.veloc.expansionintE(B-V)Redenningmagphot.color.excessfloatVMAGAbsolute V magnitudemagphys.magAbsfloatR*Stellar radiussolRadphys.size.radiusfloatlogMdotMass loss ratelog(solMass.yr**-1)phys.mass.lossfloatlogLLuminositylog(solLum)phys.luminosityfloatetaWind efficiency {eta} = (dM/dt)cV_{infty}_/Lstat.paramfloatMass? Stemmar mass (1)solMassphys.massintnullableXH[0/1] Hydrogen mass-fractionphys.mass;arith.ratiofloatbin[x?] Binarity: x=detected, ?=questionablemeta.codecharn_bin[c] c: high X-ray emissionmeta.notecharRefReferences (2)meta.refcharSimbadSimbad column added by the CDSmeta.ref.urlcharlogQHI? Number of HI ionizing photons (3)log(ph.s**-1)phot.flux.density;em.optfloatnullableTzHI? Zanstra temperature from HI (3)Kphys.temperatureintnullablelogQHeI? Number of HeI ionizing photons (3)log(ph.s**-1)phot.flux.density;em.optfloatnullablelogQHeII? Number of HeII ionizing photons (3)log(ph.s**-1)phot.flux.density;em.optfloatnullableTzHeII? Zanstra temperature from HeII (3)Kphys.temperatureintnullable_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main