Astrophysics and Space Science

, Volume 76, Issue 1, pp 23–33 | Cite as

A note on the statistics of early-type close binaries

  • R. E. Wilson
  • J. B. Rafert


We define adegree of contact index,Ic, and give its frequency diagram for 16 early-type close binaries. The eventual objective is to see whether the numbers of such systems are continuous or discontinuous across marginal contact. Data for four of the systems-TU Mus, V499 Sco, δ Pic, and SZ Cam-are from new photometric analyses, whose results are also given. Present results suggest that there is continuity in frequency across marginal contact, although one would like to include more binaries as further observations become available. An interesting point is that the only two systems in the bin of largestIc are known to be in the rapid phase of mass transfer.


Mass Transfer Interesting Point Rapid Phase Close Binary Eventual Objective 
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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  1. Andersen, J. and Gronbech, B.: 1975,Astron. Astrophys. 45, 107.Google Scholar
  2. Andersen, J., Nordstrom, B., and Wilson, R. E.: 1980,Astron. Astrophys. 82, 225.Google Scholar
  3. Bookmyer, B. B.: 1966,Astron. J. 71, 1012.Google Scholar
  4. Budding, E.: 1975,Astrophys. Space Sci. 36, 329.Google Scholar
  5. Carbon, D. F. and Gingerich, O.: 1969, in O. Gingerich (ed.),Theory and Observation of Normal Stellar Atmospheres, MIT Press, Cambridge, Mass.Google Scholar
  6. Chambliss, C. R. and Leung, K. C.: 1979,Astrophys. J. 228, 828.Google Scholar
  7. Cillie, G. G. and Lindsay, E. M.: 1957,Monthly Notices Roy. Astron. Soc. 117, 445.Google Scholar
  8. Cousins, A. W. J. and Lagerway, H. C.: 1971,Monthly Notices Astron. Soc. South Africa 30, 12.Google Scholar
  9. Eaton, J. A.: 1975,Astrophys. J. 197, 379.Google Scholar
  10. Evans, R. G.: 1974,Monthly Notices Roy. Astron. Soc. 167, 517.Google Scholar
  11. Heintze, J. R. W. and Grygar, J.: 1970,Bull. Astron. Soc. Czech. 21, 77.Google Scholar
  12. Kitamura, M. and Yamasaki, A.: 1972,Tokyo Astron. Bull., Second Ser. 220, 2563.Google Scholar
  13. Knipe, G. F. G.: 1971,Johannesb. Obs. Circ. No. 131, 8, 8.Google Scholar
  14. Koch, R. H. and Koegler, C. A.: 1977,Astrophys. J. 214, 423.Google Scholar
  15. Koch, R. H., Plavec, M. J. and Wood, F. B.: 1970,A Catalog of Graded Photometric Studies of Close Binaries, University of Pennsylvania Printing Office, Philadelphia.Google Scholar
  16. Leung, K. C. and Schneider, D. P.: 1977,Astrophys. J. 211, 844.Google Scholar
  17. Leung, K. C. and Schneider, D. P.: 1978a,Astrophys. J. 222, 924.Google Scholar
  18. Leung, K. C. and Schneider, D. P.: 1978b,Astrophys. J. 224, 565.Google Scholar
  19. Leung, K. C. and Wilson, R. E.: 1977,Astrophys. J. 211, 853.Google Scholar
  20. Lucy, L. B.: 1976,Astrophys. J. 205, 208.Google Scholar
  21. Lucy, L. B. and Wilson, R. E.: 1979,Astrophys. J. 231, 502.Google Scholar
  22. Morton, D. C. and Adams, T. F.: 1968,Astrophys. J. 151, 611.Google Scholar
  23. Popper, D. M.: 1966,Astron. J. 71, 175.Google Scholar
  24. Rucinski, S. M.: 1976,Publ. Astron. Soc. Pacific. 88, 244.Google Scholar
  25. Schneider, D. P. and Leung, K. C.: 1978,Astrophys. J. 223, 202.Google Scholar
  26. Schneider, D. P., Darland, J. J. and Leung, K. C.: 1979,Astron. J. 84, 236.Google Scholar
  27. Thackeray, A. D.: 1966,Monthly Notices Roy. Astron. Soc. 131, 435.Google Scholar
  28. Webbink, R. F.: 1976,Astrophys. J. Suppl. 32, 583.Google Scholar
  29. Wilson, R. E. and Biermann, P.: 1976,Astron. Astrophys. 48, 349.Google Scholar
  30. Wilson, R. E. and Devinney, E. J.: 1971,Astrophys. J. 166, 605.Google Scholar
  31. Wilson, R. E. and Leung, K. C.: 1977,Astron. Astrophys. 61, 137.Google Scholar
  32. Wilson, R. E. and Starr, T. C.: 1976,Monthly Notices Roy. Astron. Soc. 176, 625.Google Scholar

Copyright information

© D. Reidel Publishing Company 1981

Authors and Affiliations

  • R. E. Wilson
    • 1
  • J. B. Rafert
    • 2
  1. 1.Department of AstronomyUniversity of Florida and Max Planck Institute for Phycis and AstrophysicsUSA
  2. 2.Department of Physics and AstronomyAppalachian State UniversityBoone

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