Astronomy Reports

, Volume 46, Issue 4, pp 275–292 | Cite as

A photometric and spectroscopic study of the B[e]/X-ray transient CI Cam

  • E. A. Barsukova
  • N. V. Borisov
  • V. P. Goranskii
  • V. M. Lyutyi
  • N. V. Metlova


We compare U BV R photometry of CI Cam obtained using facilities at the Sternberg Astronomical Institute in 1998–2001 and medium-resolution spectroscopy obtained at the Special Astrophysical Observatory in the same period. The photometric measurements and fluxes in the Balmer and some Fe II emission lines in the post-outburst quiescent spectrum of CI Cam display cyclic variations with a period of 1100±50d. These variations could be due to orbital motion in a widely separated binary; one component, a giant, produces a reflection effect on the surface facing the other, compact component. Our V-band photometry confirms the \(11\mathop d\limits_. 7\) period found by Miroshnichenko before the outburst but shows a lower amplitude (3%). We investigate the possibility that this photometric period is the same as the rotational period of the radio jets measured using the VLA. Based on modeling of the radio map, we estimate the inclination of the jet rotation axis to the line of sight, i=35°–40°; the angle between the rotational axis and jet ejection direction, ϑ=7°–10°; and the jet spatial velocity, 0.23–0.26 c. The equivalent widths and fluxes of various spectral lines show different variation amplitudes during outburst and significantly different behavior during quiescence. We have detected five patterns of behavior, which provide evidence for stratification of the gas and dust envelope surrounding the system. The brightening of the [N II] forbidden line is delayed by 50–250d relative to the X-ray outburst maximum.


Equivalent Width Photometric Measurement Special Astrophysical Observatory Spatial Velocity Compact Component 
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  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.
    P. W. Merrill, M. L. Humasson, and C. G. Burwell, Astrophys. J. 76, 156 (1932).CrossRefADSGoogle Scholar
  3. 3.
    P. W. Merrill and C. G. Burwell, Astrophys. J. 78, 97 (1933).CrossRefADSGoogle Scholar
  4. 4.
    R. A. Downes, Publ. Astron. Soc. Pac. 96, 807 (1984).CrossRefADSGoogle Scholar
  5. 5.
    A. S. Miroshnichenko, Astron. Astrophys. Trans. 6, 251 (1995).ADSGoogle Scholar
  6. 6.
    Yu. K. Bergner, A. S. Miroshnichenko, R. V. Yudin, et al., Astron. Astrophys., Suppl. Ser. 112, 221 (1995).ADSGoogle Scholar
  7. 7.
    A. S. Miroshnichenko, Odessa Astron. Publ. 7, 76 (1994).ADSGoogle Scholar
  8. 8.
    Ya. N. Chkhikvadze, Astrofizika 6, 65 (1970).Google Scholar
  9. 9.
    D. Smith, R. Remillard, J. Swank, et al., IAU Circ. No. 6855 (1998).Google Scholar
  10. 10.
    T. Belloni, S. Dieters, M. E. van den Ancker, et al., Astrophys. J. 527, 345 (1999).CrossRefADSGoogle Scholar
  11. 11.
    Y. Ueda, M. Ishida, H. Inoue, et al., Astrophys. J. Lett. 508, L167 (1998).CrossRefADSGoogle Scholar
  12. 12.
    E. L. Robinson, W. F. Welch, M. T. Adams, and M. E. Cornell, IAU Circ., No. 6862 (1998).Google Scholar
  13. 13.
    E. A. Barsukova, S. N. Fabrika, S. A. Pustilnik, and A. V. Ugryumov, Bull. Spec. Astrophys. Obs. 45, 145 (1998).ADSGoogle Scholar
  14. 14.
    J. S. Clark, I. A. Steele, R. P. Fender, and M. J. Coe, Astron. Astrophys. 348, 888 (1999).ADSGoogle Scholar
  15. 15.
    E. A. Barsukova and S. N. Fabrika, Variable Stars—The Key to Understanding the Structure and Evolution of the Galaxy [in Russian], Ed. by N. N. Samus’ and A. V. Mironov (Cygnus, Nizhni Arkhyz, 2000), p. 154.Google Scholar
  16. 16.
    J. S. Clark, A. S. Miroshnichenko, V. M. Larionov, et al., Astron. Astrophys. 356, 50 (2000).ADSGoogle Scholar
  17. 17.
    R. M. Hjellming and A. J. Mioduszewski, Sky Telesc. 96 (2), 22 (1998).Google Scholar
  18. 18.
    R. M. Hjellming and A. J. Mioduszewski, IAU Circ., No. 6872 (1998).Google Scholar
  19. 19.
    M. Orlandini, A. N. Parmar, F. Frontera, et al., Astron. Astrophys. 356, 163 (2000).ADSGoogle Scholar
  20. 20.
    A. N. Parmar, T. Belloni, M. Orlandini, et al., Astron. Astrophys. 360, L31 (2000).ADSGoogle Scholar
  21. 21.
    V. G. Kornilov, I. M. Volkov, A. I. Zakharov, et al., Catalogue of W BV R Values for Bright Stars of the North Sky (Mosk. Gos. Univ., Moscow, 1991), Tr. Gos. Astron. Inst., Mosk. Gos. Univ. 63.Google Scholar
  22. 22.
    M. R. Garsia, P. Berlind, E. Barton, and J. E. McClintock, IAU Circ., No. 6865 (1998).Google Scholar
  23. 23.
    R. I. Hynes, P. Roche, C. A. Haswell, et al., IAU Circ., No. 6871 (1998).Google Scholar
  24. 24.
    T. J. Deeming, Astrophys. Space Sci. 36, 173 (1975).CrossRefMathSciNetGoogle Scholar
  25. 25.
    T. Kato and M. Uemura, Inf. Bull. Var. Stars, No. 5081 (2001).Google Scholar
  26. 26.
    E. L. Chentsov, V. G. Klochkova, and N. S. Tavolganskaya, Bull. Spec. Astrophys. Obs. 48, 21 (1999).ADSGoogle Scholar
  27. 27.
    A. R. Striganov and N. S. Sventitskii, Tables of Spectral Lines of Neutral and Ionized Atoms (Atomizdat, Moscow, 1966; Plenum, New York, 1968).Google Scholar
  28. 28.
    S. Heung, L. H. Aller, W. A. Feibelman, et al., Mon. Not. R. Astron. Soc. 318, 77 (2000).ADSGoogle Scholar
  29. 29.
    A. B. Meinel, A. F. Aveni, and M. W. Stockton, Catalog of Emission Lines in Astrophysical Objects (Univ. of Arizona, Tucson, 1969, 2nd ed.).Google Scholar
  30. 30.
    I. Iben, Astrophys. J. 259, 244 (1982).CrossRefADSGoogle Scholar

Copyright information

© MAIK "Nauka/Interperiodica" 2002

Authors and Affiliations

  • E. A. Barsukova
    • 1
  • N. V. Borisov
    • 1
  • V. P. Goranskii
    • 2
  • V. M. Lyutyi
    • 2
  • N. V. Metlova
    • 2
  1. 1.Special Astrophysical ObservatoryRussian Academy of SciencesNizhni Arkhyz, Karachai-Cherkessian RepublicRussia
  2. 2.Sternberg Astronomical InstituteMoscowRussia

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