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- W45457816 abstract "Envelope ionization variations during the pulsations of ..beta.. Cephei variables are known to be insufficient to drive pulsations in these stars in the presence of strong deeper radiative damping. If a model can be found with smaller than normal damping, or larger than normal helium ionization driving, then any intermittent core region driving will be more effective and will drive the pulsations to a larger than normal amplitude. If the net damping is so small then the decay of these pulsations will also be slower than normal. It is suggested that increased envelope helium, which might occur by accretion of matter from an involved companion, or as just self homogenization, gives some helium ionization driving and a smaller decay rate. Perhaps BW Vulpeculae has such helium enriched surface layers which explain its unique large amplitude, even though the helium lines do appear normal." @default.
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- W45457816 date "1981-01-01" @default.
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- W45457816 title "Envelope ionization mechanisms and BW Vulpeculae" @default.
- W45457816 hasPublicationYear "1981" @default.
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