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Wolf-Rayet stars

  • Wolf-Rainer Hamann
III. Stellar Winds and Massive Stars
Part of the Lecture Notes in Physics book series (LNP, volume 401)

Abstract

Based on the so-called standard model for expanding atmospheres, non-LTE model calculations have been developed during the last years. Their application for the quantitative spectral analysis of WR stars is in progress. Recent results about the parameters and chemical composition of WR atmospheres are reviewed. From the achieved consistency between model predictions and observations, including the test case V444 Cygni, we conclude that the standard model is an adequate description of WR atmospheres to a satisfactory degree of accuracy. The empirical results of the spectral analyses obtained so far fit into the scenario of post-red-supergiant evolution, although there is not yet a detailed agreement with calculated tracks. The driving mechanism of WR winds remains an open question.

Keywords

Light Curve Massive Star Stellar Wind Helium Line Evolutionary Track 
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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References

  1. Abbott D.C., Conti P.S.: 1987, Ann. Rev. A&A 25, 113Google Scholar
  2. Abbott D.C., Bieging J.H., Churchwell E., Torres A.V.: 1986, ApI 303, 239Google Scholar
  3. Beals C.S.: 1929, MNRAS 90, 202Google Scholar
  4. Breysacher J.: 1981, A&A Suppl. 43, 203Google Scholar
  5. Castor J.I., Van Blerkom D.: 1970, ApJ 161, 485Google Scholar
  6. Chcrepashchuk A.M., Eaton JA., Khaliullin K.F.: 1984, ApJ 281, 774Google Scholar
  7. Conti P.S., Lccp E.M., Perry D.N.: 1983, A&A 268, 228Google Scholar
  8. Garmany C.D., Conti P.S.: 1985, ApJ 293, 407Google Scholar
  9. Hamann W. R.: 1985, A&A 148, 364Google Scholar
  10. Hamann W. R.: 1986, A&A 160, 347Google Scholar
  11. Hamann W. R.: 1987, in Numerical Radiative Transfer, W. Kalkofen (ed.), Cambridge University Press, p. 35Google Scholar
  12. Hamann W.-R.: 1990, in Properties of Hot Luminous Stars, C.D. Garmany (ed.), ASP Conference Series Vol. 7, p. 259Google Scholar
  13. Hamann W. R., Wessolowski U.: 1990, A&A 227, 171Google Scholar
  14. Hamann W. R., Dünnebeil G., Koesterke L., Schmutz W., Wcssolowski U.: 1991, A&A 249, 443Google Scholar
  15. Hamann W.-R., Leuenhagen U., Koesterke L., Wessolowski U.: 1992, A&A (in press)Google Scholar
  16. Hillier DJ.: 1987a, ApJ Suppl. 63, 947Google Scholar
  17. Hillier DJ.: 19876, ApJ Suppl. 63, 965Google Scholar
  18. Hillier DJ.: 1988, ApI 327, 822Google Scholar
  19. Hillier DJ.: 1989, ApJ 347, 392Google Scholar
  20. Hillier DJ.: 1991, A&A 247, 455Google Scholar
  21. van der Hucht KA.: 1991, in Wolf-Rayet Stars and Interrelations with Other Massive Stars in Galaxies, Proceedings of LAU Symp. No. 143, KA. van der Hucht and B. Hidayat (eds.), Kluver Academic Publishers, Dordrecht, p. 19Google Scholar
  22. van der Hucht KA., Conti P.S., Lundström I., Stenholm B.: 1981, Space Sci. Rev. 28, 227Google Scholar
  23. Koesterke L., Hamann W.-R., Schmutz W., Wessolowski U.: 1991, A&A 248, 166Google Scholar
  24. Koesterke L., Hamann W. R., Kosmol P.: 1992, A&4 (in press)Google Scholar
  25. Kornilov V., Cherepashchuk A.M.: 1979, Sov. Astron. Letters 5, 214Google Scholar
  26. Kudritzki R.P., Pauldrach A., Puls J.: 1987, A&A 173, 293Google Scholar
  27. Maeder A.: 1987, A&4 178, 199Google Scholar
  28. Maeder A.: 1990, A&A Suppl. 84, 139Google Scholar
  29. Mihalas D., Hummer D.G.: 1973, ApJ 179, 827Google Scholar
  30. Nugis T.: 1991, in Wolf-Rayet Stars and Interrelations with Other Massive Stars in Galaries, Proceedings of IAU Symp. No. 143, KA. van der Hucht and B. Hidayat(eds.), Kluver Academic Publishers, Dordrecht, p. 75Google Scholar
  31. Nussbaumer H., Schmutz W., Smith LJ., Willis AJ.: 1982, A&A Suppl. 47, 257Google Scholar
  32. Pollock A.M.T.: 1987, ApJ 320, 283Google Scholar
  33. Schmutz W., Hamann W.-R., Wessolowski U.: 1989, A&A 210, 236Google Scholar
  34. Smith L.F.: 1968, MNRAS 138, 109Google Scholar
  35. Smith LJ., Willis AJ.: 1982, MNRAS 201, 451Google Scholar
  36. Underhill A.B.: 1991, ApJ (in press)Google Scholar
  37. Wessolowski U., Sehmutz W., Hamann W. R.: 1988, A&A 194, 160Google Scholar
  38. Willis AJ.: 1991, in Wolf-Rayet Stars and Interrelations with Other Massive Stars in Galaxies, Proceedings of IAU Symp. No. 143, KA. van der Hucht and B. Hidayat (eds.), Kluver Academic Publishers, Dordrecht, p. 265Google Scholar
  39. Willis AJ., Wilson R.: 1978, MNRAS 182, 559Google Scholar
  40. Wolf CJ.E., Rayet G.A.P.: 1867, Comptes Rendus 65, 292Google Scholar

Copyright information

© Springer-Verlag 1992

Authors and Affiliations

  • Wolf-Rainer Hamann
    • 1
  1. 1.Institut für Theoretische Physik und Sternwarte der UniversitätKielGermany

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