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Theoretical Nonradial Pulsation of β Cephei Models

Published online by Cambridge University Press:  30 March 2016

Hideyuki Sato
Hideyuki Sato*
Affiliation:
Joint Institute for Laboratory Astrophysics, University of Colorado and National Bureau of Standards, Boulder, Colorado 80309, U.S.A.

Extract

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The excitation mechanism for the pulsations of β Cephei stars and variable B stars is not yet understood. Recently, Stellingwerf (1978) found that an opacity bump located near the He+ ionization zone has a significant effect on the stability of radial pulsations in massive stars. However, the opacity bump, according to current opacities, is probably not enough to excite radial pulsations. On the other hand, some observational facts suggest that nonradial pulsations may participate in the variations of β Cephei stars and variable B stars. Therefore, it is interesting and important to examine the effect of the opacity bump on nonradial pulsations in massive stars.

Type
Joint Discussion
Information
Highlights of Astronomy , Volume 5: Highlights of Astronomy. As presented at the XVIIth General Assembly of the IAU, 1979 , 1980 , pp. 461 - 462
Copyright
Copyright © Cambridge University Press 1980

References

Saio, H. and Cox, J.P. 1979, submitted to Ap. J. Google Scholar
Stellingwerf, R.F. 1978, A. J., 83, 1184.Google Scholar