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Norman R. Simon Papers
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Document Type
Article
Date of this Version
6-6-1978
Citation
Astron. Astrophys. 75, 140-148 (1979).
Abstract
It is proposed that the maintenance of stable double-mode pulsation involves a resonant interaction between the two excited modes. This hypothesis yields a simple explanation of the narrow range of period ratio (P1/P0) observed in both the double-mode Cepheids and the double-mode AI Velorum stars. The resonance idea is consistent with the under-massive models previously invoked to match the double-mode Cepheids, but seems to rule out normal Population I masses for the AI Velorum stars. It is argued that observational evidence regarding the pulsations of the AI Vel objects does not at present preclude the latter result.
Comments
Copyright 1976 European Southern Observatory