Skip to main content
SpringerLink
Log in

Modeling of rapid variability in the spectral line profiles of Wolf-Rayet stars

  • Published:
Astronomy Reports Aims and scope Submit manuscript

Abstract

Profiles of variable emission lines in the spectra of Wolf-Rayet stars are calculated using a stochastic cloud model for the inhomogeneous atmospheres of early-type stars. The model assumes that most of the line flux is formed in cold, dense condensations (clouds) that move through a rarified inter-cloud medium whose density monotonically decreases outwards. The formation of clouds is taken to be stochastic. Wavelet analysis is used to estimate the parameters of cloud ensembles. The model can reproduce the general pattern of line-profile variability observed in the spectra of Wolf-Rayet stars.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. A. F. J. Moffat, S. Lépine, R. N. Henriksen, and C. Robert, Astrophys. Space Sci. 216, 55 (1994).

    Article  ADS  Google Scholar 

  2. T. Eversberg, S. Lépine, and A. F. J. Moffat, Astrophys. J. 494, 799 (1998).

    Article  ADS  Google Scholar 

  3. A. M. Cherepashchuk, Astron. Zh. 67, 955 (1990) [Sov. Astron. 34, 481 (1990)].

    ADS  Google Scholar 

  4. S. Marchenko, A. F. J. Moffat, et al., in Wolf-Rayet Phenomena in Massive Stars at Galaxies (IAU Symposium 193), p. 47.

  5. A. M. Cherepashchuk, J. A. Eaton, and Kh. F. Khaliullin, Astrophys. J. 281, 774 (1984).

    Article  ADS  Google Scholar 

  6. I. I. Antokhin, A. F. Kholtygin, and A. M. Cherepashchuk, Astron. Zh. 65, 558 (1988) [Sov. Astron. 32, 285 (1988)].

    ADS  Google Scholar 

  7. S. Lépine, Astrophys. Space Sci. 221, 371 (1993).

    Google Scholar 

  8. S. Lépine, A. F. J. Moffat, and R. N. Henriksen, Astrophys. J. 466, 392 (1996).

    ADS  Google Scholar 

  9. S. Lépine and A. F. J. Moffat, Astrophys. J. 514, 909 (1999).

    ADS  Google Scholar 

  10. F. V. Kostenko and A. F. Kholtygin, Astrofizika 42, 373 (1999).

    Google Scholar 

  11. A. F. Kholtygin, ASP Conf. Ser. 204, 231 (2000).

    ADS  Google Scholar 

  12. D. J. Hillier, in Wolf-Rayet Stars: Binaries, Colliding Winds, Evolution (IAU Symposium 163), Ed. by K. A. van der Hucht and P. M. Williams (Kluwer, Dordrecht, 1995), p. 116.

    Google Scholar 

  13. V. V. Sobolev, A Course in Theoretical Astrophysics [in Russian] (Nauka, Moscow, 1975), p. 354.

    Google Scholar 

  14. A. F. Kholtygin, in Wolf-Rayet Stars: Binaries, Colliding Winds, Evolution (IAU Symposium 163), Ed. by K. A. van der Hucht and P. M. Williams (Kluwer, Dordrecht, 1995), p. 160.

    Google Scholar 

  15. Kh. F. Khaliullin and A. M. Cherepashchuk, Itogi Nauki Tekh., Ser. Astron. 21, 5 (1982).

    Google Scholar 

  16. J. I. Castor and H. J. G. L. M. Lamers, Astrophys. J., Suppl. Ser. 39, 481 (1979).

    Article  ADS  Google Scholar 

  17. A. F. J. Moffat, L. Drissen, R. Lamontagne, and C. Robert, Astrophys. J. 334, 1038 (1988).

    Article  ADS  Google Scholar 

  18. N. M. Astaf’eva, Usp. Fiz. Nauk 166(11), 145 (1996) [Phys. Usp. 39, 1085 (1996)].

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Astronomical Institute, St. Petersburg State University, Bibliotechnaya pl. 2, Petrodvorets, 198904, Russia

    N. A. Kudryashova & A. F. Kholtygin

Authors
  1. N. A. Kudryashova
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. A. F. Kholtygin
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

__________

Translated from Astronomicheski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Zhurnal, Vol. 78, No. 4, 2001, pp. 333–340.

Original Russian Text Copyright © 2001 by Kudryashova, Kholtygin.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Kudryashova, N.A., Kholtygin, A.F. Modeling of rapid variability in the spectral line profiles of Wolf-Rayet stars. Astron. Rep. 45, 287–293 (2001). https://doi.org/10.1134/1.1361320

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1134/1.1361320

Keywords

Search

Navigation