Wind Ionization Structure of the Short-Period Eclipsing LMC Wolf-Rayet Binary BAT99-129: Preliminary Results |
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| Authors: | C Foellmi A F J Moffat S V Marchenko |
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| Institution: | (1) European Southern Observatory, 3107 Alonso de Cordova, 19 Vitacura, Santiago, Chile;(2) Département de physique, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montréal, QC, H3C 3J7, Canada;(3) Department of Physics and Astronomy, Thompson Complex Central Wing, Western Kentucky University, Bowling Green, KY 42101-3576, USA |
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| Abstract: | BAT99-129 is a rare, short-period eclipsing Wolf-Rayet binary in the Large Magellanic Cloud. We present here medium-resolution NTT/EMMI spectra that allow us to disentangle the spectra of the two components and find the orbital parameters of the binary. We also present VLT/FORS1 spectra of this binary taken during the secondary eclipse, i.e. when the companion star passes in front of the Wolf-Rayet star. With these data we are able to extract, for the first time in absolute units for a WR + O binary, the sizes of the line emitting regions.Based on observations obtained at the La Silla and Paranal Observatories, European Southern Observatory (Chile). |
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| Keywords: | Binaries: close Binaries: Wolf-Rayet Binaries: eclipsing Binaries: individual: BAT99-129 Binaries: evolution Stars: massive stars |
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