Contact Binaries of Spectral Type O

  • Kam-Ching Leung
  • Donald P. Schneider
Part of the International Astronomical Union/Union Astronomique Internationale book series (IAUS, volume 83)


The eclipsing binaries UW CMa, AO Cas, and V729 Cyg have been systems of great interest for over fifty years. The light curves are complex and suffer significant changes on a time scale of months, but the primary attraction of these systems is that both components have O-type spectra; thus they present us with some of the few possibilities for direct measurement of absolute dimensions of very massive stars. Much effort has been expended on these systems, but no really consistent model has emerged.


Light Curve Radiation Pressure Contact Model Massive Star Spectral Type 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  2. Leung, K. C., and Schneider, D. P.: 1978b, Astrophys. J. 224, (in press).Google Scholar
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Copyright information

© International Astronomical Union 1979

Authors and Affiliations

  • Kam-Ching Leung
    • 1
    • 2
  • Donald P. Schneider
    • 3
  1. 1.Behlen Observatory, Department of Physics and AstronomyUniversity of NebraskaUSA
  2. 2.Office of Energy ResearchU. S. Department of EnergyUSA
  3. 3.Hale Observatories, Carnegie Institution of WashingtonCalifornia Institute of TechnologyUSA

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