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Double Periodicity in Be Stars*

Published online by Cambridge University Press:  23 September 2016

D. Clarke  and
P.A. McGale
D. Clarke
Affiliation:
University Observatory, Acre Road / Maryhill Road, Glasgow G20 OTL, Scotland, U.K.
P.A. McGale
Affiliation:
University Observatory, Acre Road / Maryhill Road, Glasgow G20 OTL, Scotland, U.K.

Summary

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Photometric periodicities with two unequal maxima and minima reported for Be stars are shown to result from a fundamental and overtone associated with rotation of an atmospheric bulge. It is the form of the scattering function of the free electron that produces the double periodicity; the stellar geometry — co-latitude of the bulge and inclination of the stellar rotational pole — controls the amplitudes of the two components. The form of the light curves is consistent with the oblique rotator model.

Type
III. The Circumstellar Gas
Information
International Astronomical Union Colloquium , Volume 92: Physics of Be Stars , August 1987 , pp. 197 - 199
Copyright
Copyright © Cambridge University Press 1987

Footnotes

*

Read by P. Harmanec

References

Balona, L.A., Engelbrecht, C.A.: 1986 M. N. Roy. Astr. Soc. 219, 131 Google Scholar
Clarke, D., McGale, P.A.: 1986a In Press - Astron. Astrophys.Google Scholar
Clarke, D., McGale, P.A.: 1986b Submitted - Astron. Astrophys.Google Scholar
Clarke, D., McGale, P.A.: 1986c Submitted - Astron. Astrophys.Google Scholar
Harmanec, P.: 1984 Bull. Astron. Inst. Czechosl. 35, 193 Google Scholar