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Some Notes On SS Cygni

Conference paper
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Abstract

The results of photoelectric and spectral observations of SS Cyg are briefly discussed. Some features of the spectral variations observed during a large outburst of SS Cyg can probably be explained using a model of a double star which is surrounded by an absorbing gaseous shell. It is noted that the existing data are not numerous enough for the explanation of the SS Cyg variability, in particular, its short-term variations.

SS Cyg is a spectroscopic binary star with a 0.d276 period. The components of this system are dwarf stars (M = 5.m5 for both stars), with dG5 and sdBe spectra; they probably show eruptive activity (Joy, 1956). In the spectrum of the B-component strong emission lines are observed. The dG5 spectrum is observed only in the minimum of SS Cyg.

There are various investigations of SS Cyg, but up to now the cause of its variability, in particular, its rapid variability has not been determined. In addition, there are many other observations which have not been explained.

Keywords

Light Variation Spectral Observation Double Star Dwarf Star Flare Star 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Barbier, D., Chalonge, D., Astrophys. J., 90, 627, 1939ADSCrossRefGoogle Scholar
  2. Bretz, M., Mirzoyan, L.V., Oskanian, V.S., Astrofizika, 10, 39, 1974ADSGoogle Scholar
  3. Chalonge, D., Divan, L., Mirzoyan, L.V., Astrofizika, 4, 603, 1968ADSGoogle Scholar
  4. Gorbatskij, V.G., Eruptive Stars, eds. Boyarchuk, A.A., Gershberg, R.E., Nauka, Moscow, 1970, p. 63Google Scholar
  5. Hinderer, F., Astron. Nachr., 277, 193, 1949ADSCrossRefGoogle Scholar
  6. Joy, A., Astrophy. J., 124, 317, 1956ADSCrossRefGoogle Scholar
  7. Mirzoyan, L.V., Stellar Instability and Evolution, Ac. Sci. Armenian SSR, Yerevan, 1981Google Scholar
  8. Mirzoyan, L.V., Kalloghlian, N.L., Astrofizika, 1, 385, 1965Google Scholar
  9. Walker, M.F., Chincarini, G., Astrophys. J., 154, 157, 1968ADSCrossRefGoogle Scholar
  10. Zuckerman, M.C., Ann. Astrophys., 24, 431, 1961ADSGoogle Scholar

Copyright information

© D. Reidel Publishing Company 1987

Authors and Affiliations

  1. 1.Byurakan Astrophysical ObservatoryArmeniaUSSR

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