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Motions in the Shells and Atmospheres of V923 Aql and Ew Lac and Their Manifestation in the Spectrum

Published online by Cambridge University Press:  14 August 2015

N. F. Vojkhanskaya
N. F. Vojkhanskaya*
Affiliation:
Special Astrophysical Observatory, Academy of Sciences, U.S.S.R.

Extract

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The stars V923 Aql (HD 183656) and EW Lac (HD 217050) are marked in the General Catalog of Variable Stars (Kukarkin et al., 1969) as unique, similar objects with shells. The two stars have quasiperiodic variations in brightness (Lynds, 1960; Walker, 1953). It is assumed here that the variation of brightness is caused by an inhomogeneous distribution of brightness over the surface of the star. A consideration of the literature data on the radial velocities Vr which we have carried out has shown that the variation of Vr is different (Figure 1).

Type
Part IV: Line Formation in Expanding Atmospheres
Information
Symposium - International Astronomical Union , Volume 70: Be and Shell Stars , 1976 , pp. 327 - 331
Copyright
Copyright © Reidel 1976 

References

Kukarkin, B. V., Kholopov, P. N., Efremov, Yu. N., Kukarkina, N. P., Kurochkin, N. E., Medvedeva, G. I., Perova, N. B., Fedorovich, V. P., and Frolov, M. S.: 1969, General Catalog of Variable Stars (3d ed.) Moscow.Google Scholar
Lynds, C. R.: 1960, Astrophys. J. 131, 390.Google Scholar
Strand, K. Aa.: 1969, Stars and Stellar Systems 3, 273.Google Scholar
Walker, M. F.: 1953, Astrophys. J. 118, 481.Google Scholar