, Volume 56, Issue 1, pp 8–18 | Cite as

Spectral observations of flare stars in the neighborhood of the sun

  • N. D. Melikian
  • V. S. Tamazian
  • R. Sh. Natsvlishvili
  • A. A. Karapetian

Results of spectral monitoring of the flare stars HU Del, CM Dra, WX UMa, and VW Com by the 2.6-m telescope at the Byurakan Observatory during May-June 2012 with the SCORPIO spectral camera are reported. A strong flare of WX UMa was recorded during the observation period, as well as faint flares of CM Dra and HU Del, while no variations in brightness or equivalent widths were observed for VW Com. During all the recorded flares the maximum brightness corresponded to minimum values of the equivalent widths of the Hα and Hβ emission lines. The energy distribution in the spectrum of WX UMa changed sharply during the flare. The class M6 spectrum of the star transformed into an early type B spectrum. Finally, the appearance of the forbidden oxygen [OI] 6300 Å line with an intensity comparable to that of [OI] 5577 Å seems to indicate simultaneous release of the energy of the flare in different layers of the chromosphere.


flare stars spectral observations 


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  1. 1.
    W. J. Luyten, Astrophys. J. 109, 532 (1949).ADSCrossRefGoogle Scholar
  2. 2.
    W. J. Luyten, Publ. Astron. Soc. Pacif. 61, 133 (1949).CrossRefGoogle Scholar
  3. 3.
    G. Haro and W. W. Morgan, Astrophys. J. 118, 16 (1953).ADSCrossRefGoogle Scholar
  4. 4.
    V. A. Ambartsumyan, Soobshch. Byurakanskoi Obs. 13, 3 (1954).Google Scholar
  5. 5.
    G. H. Herbig, Publ. Astron. Soc. Pacif. 68, 531 (1956).ADSCrossRefGoogle Scholar
  6. 6.
    W. E. Kunkel, Astrophys. J. 161, 503 (1970).ADSCrossRefGoogle Scholar
  7. 7.
    R. E. Gershberg and P. F. Chugainov, Astron. zh. 43, 1168 (1966).ADSGoogle Scholar
  8. 8.
    R. E. Gershberg and P. F. Chugainov, Astron. zh. 44, 260 (1967).ADSGoogle Scholar
  9. 9.
    R. E. Gershberg and S. A. Kaplan, Izv. Krymskoi Obs. 44, 11 (1972).ADSGoogle Scholar
  10. 10.
    R. E. Gershberg and N. I. Shakhovskaya, Astron. zh. 48, 934 (1971).ADSGoogle Scholar
  11. 11.
    R. E. Gershberg, Izv. Krymskoi Obs. 45, 118 (1972).ADSGoogle Scholar
  12. 12.
    T. J. Moffett and B. W. Bopp, Astrophys. J. 168, L117 (1971).ADSCrossRefGoogle Scholar
  13. 13.
    T. J. Moffett and B. W. Bopp, Astrophys. J. 185, 239 (1973).ADSCrossRefGoogle Scholar
  14. 14.
    B. W. Bopp, Astrophys. J. 193, 389 (1974).ADSCrossRefGoogle Scholar
  15. 15.
    T. J. Moffett and B. W. Bopp, Astrophys. J. Suppl. Ser. 31, 61 (1976).ADSCrossRefGoogle Scholar
  16. 16.
    N. D. Melikian, M. K. Tsvetkov, and R. A. Sarkisyan, Astrofizika 37, 569 (1994).Google Scholar
  17. 17.
    V. S. Tamazian, N. D. Melikian, A. A. Karapetian, and R. Sh. Natsvlishvili, Astrofizika 48, 335 (2005).Google Scholar
  18. 18.
    R. Pallavicini, IAUS 142, 77 (1990).ADSGoogle Scholar
  19. 19.
    A. O. Benz and M. Gudel, ARA&A 48, 241 (2010).ADSCrossRefGoogle Scholar
  20. 20.
    S. J. Bentley, C. Hellier, P. F. L. Maxted, et al., Astron. Astrophys. 505, 901 (2009).ADSCrossRefGoogle Scholar
  21. 21.
    N. D. Melikian, R. Sh. Nacvlishvili, V. S. Tamazian, and A. A. Karapetian, IBVS 6031 (2012).Google Scholar
  22. 22.
    V. L. Afanasiev, E. B. Gazhur, S. L. Zhelenkov, and A. V. Moiseev, Bull. Special Astrophys. Obs. 58, 90 (2005).Google Scholar
  23. 23.
    A. V. Moiseev, Bull. Special Astrophys. Obs. 54, 74 (2002).ADSGoogle Scholar
  24. 24.
    V. L. Afanasiev and A. V. Moiseev, Astron. Lett. 31 (194 (2005).Google Scholar
  25. 25.
    R. E. Gershberg, Low-mass Flare Stars [in Russian], Nauka, Moscow (1978).Google Scholar
  26. 26.
    P. N. Kholopov, N. N. Samus’, V. P. Goranskii, et al., General Catalog of Variable Stars [in Russian], Vol. 2, Nauka, Moscow (1985).Google Scholar
  27. 27.
    B. D. Mason, G. L. Wycoff, W. I. Hartkopf, G. G. Douglass, and C. E. Worley, Astron. J. 122, 3466 (2001).ADSCrossRefGoogle Scholar
  28. 28.
    J. C. Morales, I. Ribas, C. Jordy, et al., Astrophys. J. 691, 1400 (2009).ADSCrossRefGoogle Scholar
  29. 29.
    F. Spada and P. D. Demarque, Mon. Notic. Roy. Astron. Soc. 422, 2255 (2012).ADSCrossRefGoogle Scholar
  30. 30.
    H. J. Deeg, B. Ocaña, V. P. Kozhevnikov, et al., Astron. Astrophys. 480, 563 (2008).ADSCrossRefGoogle Scholar
  31. 31.
    W. E. Kunkel, IBVS 294 (1968).Google Scholar
  32. 32.
    R. S. Harrington, Astron. J. 76, 930 (1971).ADSCrossRefGoogle Scholar
  33. 33.
    V. S. Tamazian, J. A. Docobo, Y. Y. Balega, et al., Astron. J. 136, 974 (2008).ADSCrossRefGoogle Scholar
  34. 34.
    S. Mohanty and G. Basri, Astrophys. J. 583, 451 (2003).ADSCrossRefGoogle Scholar
  35. 35.
    X. Delfosse, T. Forveille, C. Perrier, and M. Mayor, Astron. Astrophys. 331, 581 (1998).ADSGoogle Scholar
  36. 36.
    G. F. Benedict, B. E. McArthurm et al., Astron. J. 120, 1106 (2000).ADSCrossRefGoogle Scholar
  37. 37.
    A. Gould and J. Chaname, Astrophys. J. Suppl. Ser. 150, 455 (2004).ADSCrossRefGoogle Scholar
  38. 38.
    B. R. Pettersen, MmSAI 62, 217 (1991).ADSGoogle Scholar
  39. 39.
    J. Morin, J.-F. Donati, P. Petit, et al., Mon. Notic. Roy. Astron. Soc. 407, 2269 (2010).ADSCrossRefGoogle Scholar
  40. 40.
    J. H. M. M. Schmitt and T. A. Fleming, Astrophys. J. 450, 392 (1995).ADSCrossRefGoogle Scholar
  41. 41.
    A. H. Joy, ASPL 10, 41 (1967).ADSGoogle Scholar
  42. 42.
    L. V. Mirzoyan, Flare stars, FUORs, and Herbig-Haro objects, in: L. V. Mirzoyan, ed., Proc. of the symposium on the “Physics and Evolution of Stars” [in Russian], Erevan (1980), p. 45.Google Scholar
  43. 43.
    E. S. Parsamyan, Soobshch. Byurakanskoi Obs. 57, 79 (1985).ADSGoogle Scholar
  44. 44.
    N. D. Melikian, A comparative study of flares of flare stars in stellar associations and clusters and UV Cet stars, Candidate’s dissertation, Erevan (1984).Google Scholar
  45. 45.
    I. Crespo-Chacon, D. Montes, et al., in: F. Favata, G. A. J. Hussain, B. Battrick, eds., Proceedings of the 13th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun, 5-9 July 2004, Hamburg, Germany, European Space Agency, ESA SP-560, p. 491.Google Scholar
  46. 46.
    B. Rockenfeller, C. A. L. Bailer-Jones, R. Mundt, and M. A. Ibrahimov, Mon. Notic. Roy. Astron. Soc. 367, 407 (2006).ADSCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • N. D. Melikian
    • 1
  • V. S. Tamazian
    • 2
  • R. Sh. Natsvlishvili
    • 3
  • A. A. Karapetian
    • 1
  1. 1.V. A. Ambartsumyan Byurakan Astrophysical ObservatoryByurakanArmenia
  2. 2.R. M. Aller Astronomical ObservatoryUniversity of Santiago de CompostelaSantiago de CompostelaSpain
  3. 3.E. K. Kharadze Abastumani Astrophysical ObservatoryTbilisiGeorgia

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