Wind Ionization Structure of the Short-Period Eclipsing LMC Wolf-Rayet Binary BAT99-129: Preliminary Results



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.


Binaries: close Binaries: Wolf-Rayet Binaries: eclipsing Binaries: individual: BAT99-129 Binaries: evolution Stars: massive stars 


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© Springer Science+Business Media B.V. 2006

Authors and Affiliations

  • C. Foellmi
    • 1
  • A. F. J. Moffat
    • 2
  • S. V. Marchenko
    • 3
  1. 1.European Southern ObservatorySantiagoChile
  2. 2.Département de physiqueUniversité de MontréalSucc. Centre-Ville, MontréalCanada
  3. 3.Department of Physics and Astronomy, Thompson Complex Central WingWestern Kentucky UniversityBowling GreenUSA

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