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Astronomy Reports

, Volume 50, Issue 8, pp 664–678 | Cite as

Photometry and spectroscopy of CI camelpardalis from 1998–2005

  • E. A. Barsukova
  • N. V. Borisov
  • A. N. Burenkov
  • V. P. Goranskii
  • V. G. Klochkova
  • N. V. Metlova
Article

Abstract

Our long-time monitoring of the B[e] star and transient X-ray source CI Cam during quiescence following the 1998 outburst demonstrates that the complex, stratified circumstellar envelope has tended to stabilize after this structure was perturbed by the passage of a shock wave from the outburst. The star’s U BV R brightness shows slow, possibly cyclic, variations with an amplitude of about 0.2m. We determined the spectral type of the primary, B4III-V, based on the widths of the absorption wings of high-numbered Balmer lines. A Doppler shift of 460 km/s was detected for the Hell λ4686 Å emission line. The shifts in this line yield an orbital period of 19.41 days, which is also manifested itself in the photometric data as a wave with a V amplitude of 0.034m. The orbit is elliptical, with an eccentricity of 0.62. It is most likely that the secondary is a white dwarf surrounded by an accretion disk. The primary’s mass exceeds 12 M . The system may be at a late stage of its evolution, after the stage of mass exchange.

PACS numbers

97.30.Eh 97.80.Jp 

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References

  1. 1.
    H. J. G. L. M. Lamers, F.-J. Zickgraf, D. de Winter, et al., Astron. Astrophys. 340, 117 (1998).ADSGoogle Scholar
  2. 2.
    E. A. Barsukova, N. V. Borisov, V. P. Goranskii, et al., Astron. Zh. 79, 309 (2002) [Astron. Rep. 46, 275 (2002)].Google Scholar
  3. 3.
    J. S. Clark, A. S. Miroshnichenko, V. M. Larionov, et al., Astron. Astrophys. 356, 50 (2000).ADSGoogle Scholar
  4. 4.
    R. I. Hynes, J. S. Clark, E. A. Barsukova, et al., Astron. Astrophys. 392, 991 (2002).CrossRefADSGoogle Scholar
  5. 5.
    E. L. Robinson, I. I. Ivans, and W. F. Welsh, Astrophys. J. 565, 1169 (2002).CrossRefADSGoogle Scholar
  6. 6.
    A. S. Miroshnichenko, Odessa Astron. Publ. 7, 76 (1994).ADSGoogle Scholar
  7. 7.
    A. S. Miroshnickenko, Astron. Astrophys. Trans. 6, 251 (1995).ADSGoogle Scholar
  8. 8.
    J. Zorec, B[e] Stars, Ed. by A. M. Hubert and C. Jaschek (Kluwer, Dordrecht, 1998), p. 27.Google Scholar
  9. 9.
    Ya. N. Chkhikvadze, Astrofizika 6, 65 (1970).Google Scholar
  10. 10.
    T. Belloni, S. Dieters, M. E. van den Ancker, et al., Astrophys. J. 527, 345 (1999).CrossRefADSGoogle Scholar
  11. 11.
    M. Orlandini, A. N. Parmar, F. Frontera, et al., Astron. Astrophys. 356, 163 (2000).ADSGoogle Scholar
  12. 12.
    M. Ishida, K. Morio, and Y. Ueda, Astrophys. J. 601, 1088 (2004).CrossRefADSGoogle Scholar
  13. 13.
    A. J. Mioduszewski and M. P. Rupen, Astrophys. J. 615, 432 (2004).CrossRefADSGoogle Scholar
  14. 14.
    A. S. Miroshnichenko, V. G. Klochkova, K. S. Bjorkman, and V. E. Panchuk, Astron. Astrophys. 390, 627 (2002).CrossRefADSGoogle Scholar
  15. 15.
    R. M. Hjellming, A. J. Mioduszewski, Y. Ueda, et al., IAU Circ. 6872 (1998).Google Scholar
  16. 16.
    R. M. Hjellming and A. J. Mioduszewski, Sky Telescope 96(2), 22 (1998).Google Scholar
  17. 17.
    M. P. Rupen, A. J. Mioduszewski, and R. M. Hjellming, New Views of Microquasars, Ed. by Ph. Dourouchoux et al. (Center for Space Physics, Kolkata, 2002), p. 221.Google Scholar
  18. 18.
    Yu. K. Bergner, A. S. Miroshnichenko, R. V. Yudin, et al., Astron. Astrophys., Suppl. Ser. 112, 221 (1995).ADSGoogle Scholar
  19. 19.
    T. Kato and M. Uemura, Inform. Bull. Var. Stars 5081 (2001).Google Scholar
  20. 20.
    E. A. Barsukova, N. V. Borisov, A. N. Burenkov, et al., Astron. Telegram 416 (2005).Google Scholar
  21. 21.
    V. G. Kornilov, I. M. Volkov, A. I. Zakharov, et al., Tr. Gos. Astron. Inst. im. P.K. Shternberga 63 (1991).Google Scholar
  22. 22.
    T. J. Deeming, Astrophys. and Space Sci. 36, 173 (1975).MathSciNetCrossRefGoogle Scholar
  23. 23.
    E. A. Barsukova, S. N. Fabrika, S. A. Pustilnik, and A. V. Ugryumov, Bull. Spec. Astrophys. Obs. 45, 147 (1998).ADSGoogle Scholar
  24. 24.
    E. A. Barsukova and S. N. Fabrika, Variable Stars: Key to Understanding the Structure and Evolution of the Galaxy, Ed. by N. N. Samus’ and A. V. Mironov (Cygnus, Nizhnii Arkhyz, 2000), p. 154 [in Russian].Google Scholar
  25. 25.
    V. E. Panchuk, N. E. Piskunov, V. G. Klochkova, et al., Preprint № 169, SAO (Special Astrophysical Observatory, Nizhnii Arkhys, 2002).Google Scholar
  26. 26.
    V. E. Panchuk, M. V. Yushkin, and I. D. Naidenov, Preprint № 179, SAO (Special Astrophysical Observatory, Nizhnii Arkhys, 2003).Google Scholar
  27. 27.
    M. V. Yushkin and V. G. Kloochkova, Preprint № 206, SAO (Special Astrophysical Observatory, Nizhnii Arkhys, 2004).Google Scholar
  28. 28.
    V. Straizys, Multicolor Stellar Photometry (Mokslas, Vilnyus, 1977; Pachart Publ. House, Tucson, 1992), p. 139.Google Scholar
  29. 29.
    G. H. Jacoby, D. A. Hanter, and C. A. Christian, Astrophys. J., Suppl. Ser. 56, 257 (1984).CrossRefADSGoogle Scholar
  30. 30.
    J.-F. Le Borgne, G. Bruzual, R. Pello, et al., Astron. Astrophys. 402, 433 (2003).CrossRefADSGoogle Scholar
  31. 31.
    V. Straizhis, Metal-Deficient Stars (Mokslas, Vilnyus, 1982) [in Russian].Google Scholar
  32. 32.
    M. G. J. Minnaert, Practical Work in Elementary Astronomy (D. Reidel Publishing Co., Dordrecht-Holland, 1969)Google Scholar
  33. 33.
    F.-J. Zickgraf, Astron. Astrophys. 408, 257 (2003).CrossRefADSGoogle Scholar

Copyright information

© Pleiades Publishing, Inc. 2006

Authors and Affiliations

  • E. A. Barsukova
    • 1
  • N. V. Borisov
    • 1
  • A. N. Burenkov
    • 1
  • V. P. Goranskii
    • 2
  • V. G. Klochkova
    • 1
  • N. V. Metlova
    • 2
  1. 1.Special Astrophysical ObservatoryRussian Academy of SciencesKarachaĭ-Cherkessian RepublicRussia
  2. 2.Steinberg Astronomical InstituteMoscowRussia

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