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V641 Cas - A Symbiotic Candidate?

Published online by Cambridge University Press:  12 April 2016

T. Tomov  and
M. MiKolajewsKi
T. Tomov
Affiliation:
National Astronomical Observatory Rozhen, 4700 Smoljan, PB 136, Bulgaria
M. MiKolajewsKi
Affiliation:
Institute of Astronomy, N. Copernicus University, Chopina 12/18, 87-100 Torun, Poland

Extract

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The light variability of V641 Cas was discovered by Guinan et al. (1982). Spectral investigations were made earlier by Barbier(1971,1975), wich classified it as a VV Cep-type star and suggested that the V641 Cas is a binary system consisting of M3Ia supergiant and a B type star. Shaw and Guinan(1985) estimated the spectral class of the companion as B2.5. Recently Guinan et al. (1986) reported about semiregular changes with maximal amplitude of about 1.0mduring 1979–1986. Slow variations in the brightness with a mean period 310d and variable amplitude of 0.3m–0.9m ph are established by Berthold(1983).

Type
Session 1. The Basic Data
Information
International Astronomical Union Colloquium , Volume 103: The Symbiotic Phenomenon , 1988 , pp. 23 - 24
Copyright
Copyright © Kluwer 1988

References

Barbier, M,, 1971, Astron. Astrophys, 14, 396 Google Scholar
Barbier, M., 1975, Astron. Astrophys, Suppl., 20, 305 Google Scholar
Berthold, T., 1983, I.B.V.S., No. 2443.Google Scholar
Guinan, E.F., McCook, G.P. and Weisenberger, A.G., 1982, I.B.V.S., No. 2227 Google Scholar
Guinan, E.F., Wacker, S.W., McCook, G.P., Harris, W.T., Robinson, C., Dombrowski, E.G. and Donahue, R.A., 1986, I.B.V.S., No. 2925 Google Scholar
Shaw, J.S. and Guinan, E.F., 1986, B.A.A.S., 17, 875 Google Scholar
Tomov, T., Mikolajewski, M. and Mikolajewska, J., 1986, I.B.V.S., No. 2921 Google Scholar
Warner, B., 1972, M.N.R.A.S., 159, 9 Google Scholar