Skip to main content
SpringerLink
Log in

Emission lines of the red-dwarf flare star EV Lac: Stellar flares

  • Published:
Astronomy Reports Aims and scope Submit manuscript

Abstract

We present equivalent widths and profiles for Hα Hβ, Hγ and He I λ4471 Å emission lines obtained in observations of the flares of EV Lac made at the Crimean Astrophysical Observatory in 1994 and 1995. Our semi-empirical modeling of the flares gives insight into the structure of the emitting regions, including a temperature plateau, and also into the physical parameters, size, and location of the star’s relatively quiescent chromosphere.

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. M. S. Giampapa, in IAU Colloquium 71: Activity in Reddwarf Stars, Ed. by P. B. Byrne and M. Rodonó (Reidel, Dordrecht, 1983), p. 223.

    Google Scholar 

  2. P. P. Petrov, P. F. Chugainov, and A. G. Shcherbakov, Izv. Krym. Astrofiz. Obs. 69, 3 (1984).

    ADS  Google Scholar 

  3. J. G. Doyle and P. B. Byrne, in Proceedings of the 5th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun, Ed. by J. L. Linsky and R. E. Stencel; Lect. Notes Phys. 291, 173 (1987).

  4. J. G. Doyle, C. J. Butler, P. B. Byrne, and G. H. J. van den Oord, Astron. Astrophys. 193, 229 (1988).

    ADS  Google Scholar 

  5. R. D. Robinson, in IAU Colloquium 104: Solar and Stellar Flares, Ed. by B. M. Haisch and M. Rodonó (Kluwer, Dordrecht, 1989), p. 83.

    Google Scholar 

  6. E. R. Houdebine, B. H. Foing, and M. Rodonó, Astron. Astrophys. 238, 249 (1990).

    ADS  Google Scholar 

  7. A. G. Gunn, J. G. Doyle, M. Mathioudakis, and S. Avgoloupis, Astron. Astrophys. 285, 157 (1994).

    ADS  Google Scholar 

  8. A. G. Gunn, J. G. Doyle, M. Mathioudakis, et al., Astron. Astrophys. 285, 489 (1994).

    ADS  Google Scholar 

  9. V. V. Sobolev and V. P. Grinin, Astrofizika 38, 33 (1995).

    Google Scholar 

  10. R. E. Gershberg and N. I. Shakhovskaya, Astron. Zh. 48, 934 (1971) [Sov. Astron. 15, 737 (1972)].

    ADS  Google Scholar 

  11. A. N. Kulapova and N. I. Shakhovskaya, Izv. Krym. Astrofiz. Obs. 48, 31 (1973).

    Google Scholar 

  12. E. L. Eason, M. S. Giampapa, R. R. Radick, et al., Astron. J. 104, 1161 (1992).

    Article  ADS  Google Scholar 

  13. P. B. Byrne, Sol. Phys. 121, 61 (1989).

    Article  ADS  Google Scholar 

  14. E. R. Houdebine, Ir. Astron. J. 20, 213 (1992).

    ADS  Google Scholar 

  15. H. Abdul-Aziz, E. P. Abranin, I. Yu. Alekseev, et al., Astron. Astrophys., Suppl. Ser. 114, 509 (1995).

    ADS  Google Scholar 

  16. C. R. Vidal, J. Cooper, and E. W. Smith, Astrophys. J., Suppl. Ser. 25, 37 (1973).

    Article  ADS  Google Scholar 

  17. É. A. Baranovskii, R. E. Gershberg, and D. N. Shakhovskoi, Astron. Zh. 78, 78 (2001) [Astron. Rep. (in press)].

    Google Scholar 

  18. B. E. Woodgate, R. D. Robinson, K. G. Carpenter, et al., Astrophys. J. Lett. 397, L95 (1992).

    Article  ADS  Google Scholar 

  19. M. E. Machado, E. H. Avrett, J. E. Vernazza, and R. W. Noyes, Astrophys. J. 242, 336 (1980).

    Article  ADS  Google Scholar 

  20. J. E. Vernazza, E. H. Avrett, and R. Loeser, Astrophys. J. 184, 605 (1973).

    Article  ADS  Google Scholar 

  21. J. E. Vernazza, E. H. Avrett, and R. Loeser, Astrophys. J., Suppl. Ser. 30, 1 (1976).

    Article  ADS  Google Scholar 

  22. J. E. Vernazza, E. H. Avrett, and R. Loeser, Astrophys. J., Suppl. Ser. 45, 635 (1981).

    Article  ADS  Google Scholar 

  23. C. Fang, J. C. Henoux, Hu Ju, et al., Sol. Phys. 157, 271 (1995).

    Article  ADS  Google Scholar 

  24. N. D. Kostyuk and S. B. Pikel’ner, Astron. Zh. 51, 1002 (1974) [Sov. Astron. 18, 590 (1974)].

    ADS  Google Scholar 

  25. M. A. Livshits, O. G. Badalian, A. G. Kosovichev, and M. M. Katsova, Sol. Phys. 73, 269 (1981).

    Article  ADS  Google Scholar 

  26. M. M. Katsova, A. Y. Boiko, and M. A. Livshits, Astron. Astrophys. 321, 549 (1997).

    ADS  Google Scholar 

  27. M. M. Katsova, S. L. Hawley, W. P. Abbett, and M. A. Livshits, Preprint No. 4 (1120), IZMIRAN (Institute of Terrestrial Magnetism, the Ionosphere, and Radio Wave Propagation, Russian Academy of Sciences, Moscow, 1999).

  28. E. P. Abranin, I. Yu. Alekseev, S. Avgoloupis, et al., Astron. Astrophys. Trans. 17, 221 (1998).

    ADS  Google Scholar 

  29. W. P. Abbett and S. L. Hawley, Astrophys. J. 521, 906 (1999).

    Article  ADS  Google Scholar 

  30. W. E. Kunkel, Astrophys. J. 161, 503 (1970).

    Article  ADS  Google Scholar 

  31. M. M. Katsova, Astron. Zh. 67, 1219 (1990) [Sov. Astron. 34, 614 (1990)].

    ADS  Google Scholar 

  32. P. J. D. Mauas and A. Falchi, Astron. Astrophys. 310, 245 (1996).

    ADS  Google Scholar 

  33. S. L. Hawley and B. P. Pettersen, Astrophys. J. 378, 725 (1991).

    Article  ADS  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Crimean Astrophysical Observatory, National Academy of Sciences of Ukraine, p/o Nauchnyi, Crimea, 334413, Ukraine

    É. A. Baranovskii, R. E. Gershberg & D. N. Shakhovskoi

Authors
  1. É. A. Baranovskii
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. R. E. Gershberg
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. D. N. Shakhovskoi
    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. 359–369.

Original Russian Text Copyright © 2001 by Baranovski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\), Gershberg, Shakhovskoi\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\).

Rights and permissions

Reprints and permissions

About this article

Cite this article

Baranovskii, É.A., Gershberg, R.E. & Shakhovskoi, D.N. Emission lines of the red-dwarf flare star EV Lac: Stellar flares. Astron. Rep. 45, 309–318 (2001). https://doi.org/10.1134/1.1361323

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1134/1.1361323

Keywords

Search

Navigation