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Spectrum of EW Lacertae in 1974

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Conclusions

Our analysis has shown that the envelope is not an unchanging, permanent structure; instead it varies noticeably within a time of the order of a day. The surface layers of the B star adjacent to the inner layers of the envelope also do not remain stationary. The observed variation in the radial velocities suggests that they have a pulsating behavior. The quasiqeriodic brightness variation reported by Walker [3] can be explained if the amplitude and duration of the pulsations are not strictly periodic.

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Authors
  1. N. F. Voikhanskaya
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Additional information

Special Astrophysical Observatory, Academy of Sciences of the USSR. Translated from Astrofizika, Vol. 12, No. 2, pp. 219–233, April–June, 1976.

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Voikhanskaya, N.F. Spectrum of EW Lacertae in 1974. Astrophysics 12, 135–144 (1976). https://doi.org/10.1007/BF01002028

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  • DOI: https://doi.org/10.1007/BF01002028

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