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A Period Analysis of the Optical Line Variability of β Cephei1

Published online by Cambridge University Press:  12 April 2016

J. Telting ,
C. Aerts  and
P. Mathias
J. Telting
Affiliation:
Astronomical Institute ‘Anton Pannekoek’, University of Amsterdam, Kruislaan 403, NL-1098 SJ Amsterdam, Netherlands
C. Aerts
Affiliation:
Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Celestijnenlaan 200 B, B-3001 Heverlee, Belgium
P. Mathias
Affiliation:
Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Celestijnenlaan 200 B, B-3001 Heverlee, Belgium

Extract

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Recently Aerts et al. (1994, Paper I) discovered multi-periodicity in the variations of optical lines of β Cephei. They identified the frequency of the radial pulsation (f1 = 5.25cycles/day), and additionally found 2 frequencies (f2 = 5.38 c/d, f3 = 4.92 c/d) close to the main frequency. The amplitude of these variations was found to be much smaller than that of the radial pulsation. Aerts et al. (1994) attributed these small variations at the newly found frequencies to non-radial pulsation modes of the star, but labelled the mode-identifications as uncertain.

Type
Part 2. Poster Papers
Information
International Astronomical Union Colloquium , Volume 155: Astrophysical Applications of Stellar Pulsation , 1995 , pp. 297 - 298
Copyright
Copyright © Astronomical Society of the Pacific 1995

Footnotes

2

Senior Research Assistant, Belgian National Fund for Scientific Research

3

Present Address: Observatoire de la Cote d'Azur, Departement Fresnel, BP 229, F-06304 Nice Cedex 4, France

1

Based on observations obtained at the Observatoire de Haute-Provence, France

References

Aerts, C., Mathias, P., Gillet, D., & Waelkens, C., 1994, A&A 286, 109 Google Scholar
Henrichs, H.F., Bauer, F., Hill, G.M., Kaper, L., Nichols Bohlin, J.S., & Veen, P.M., 1993, Proceedings IAU Coll. 139, p. 186, Cambridge Univ. Press Google Scholar
Veen, P.M., Henrichs, H.F., et al. 1995, in preparationGoogle Scholar