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| Paper: |
Understanding Pulsations in OB Stars |
| Volume: |
203, The Impact of Large-Scale Surveys on Pulsating Star Research, IAU Colloquium 176 |
| Page: |
401 |
| Authors: |
Balona, L. A. |
| Abstract: |
Our understanding of pulsations in β Cep, SPB and ζ Oph stars is discussed. We do not understand why there are no β Cep stars earlier than O9, though the models show that the instability strip extends to hotter stars. The main problem among the SPB stars is why rotation has a strong inhibiting effect on pulsation. The ζ Oph stars are an extension of the β Cep and SPB stars to higher spherical harmonic degrees. The pulsational stability of models of B stars to modes of high degree is discussed. Results are compared with two well observed ζ Oph stars. Although there is good agreement with ζ Oph itself, the periods of the high-degree modes in α Vir are incompatible with model predictions. |
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