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Rapid Variations in the Spectra of o and, γ Cas, and χ Oph

Published online by Cambridge University Press:  14 August 2015

V. Doazan
V. Doazan*
Affiliation:
Observatoire de Paris, France

Extract

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o And is a shell star which has lost its shell characteristics several times since 1897. It exhibits short time scale light variations with a period of about one day. Its binary nature is doubtful according to Olsen (1972). We have detected rapid spectroscopic variations in October 1973 when o And had no envelope, that is, when it appeared as a ‘normal’ B star. Spectrograms of 7.2 Å mm−1 dispersion were obtained at the Haute Provence Observatory with exposure times ranging from 12 min to 52 min.

Type
Part 1: Observations of Be Stars
Information
Symposium - International Astronomical Union , Volume 70: Be and Shell Stars , 1976 , pp. 37 - 40
Copyright
Copyright © Reidel 1976 

References

Hutchings, J. B.: 1969 in Detre, L. (ed.), Non-Periodic Phenomena in Variable Stars , Academic Press, Budapest, p. 191.Google Scholar
McLaughlin, D. B.: 1932, Publ. Obs. Mich. 4, 175.Google Scholar
Olsen, E. H.: 1972, Astron. Astrophys. 20, 167.Google Scholar