On the excitation mechanism of pulsation for β Cephei stars.

Details On the excitation mechanism of pulsation for β Cephei stars. On the excitation mechanism of pulsation for β Cephei stars.

Jun 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996acasn..37..154z&link_type=abstract

Acta Astron. Sin., Vol. 37, No. 2, p. 154 - 163

Other

Beta Cephei Stars: Pulsation Theory, Beta Cephei Stars: Stellar Oscillations

Scientific paper

β Cephei stars are a group of short-period intrinsic variables on the upper main sequence. Finding the excitation mechanism for them and other early-type variables is a long standing problem. The new OPAL opacity tables show some significant enhancements with respect to the old Los Alamos opacity. The κ-mechanism proposed long ago becomes very likely to be the driving mechanism for β Cephei pulsators. The stability of β Cephei stars is studied using the linear theory of radial non-adiabatic pulsation. No stability is found up to the tenth radial overtone in the calculation. The authors suggest that the κ-mechanism might not be strong enough to excite β Cephei stars.

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