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| Paper: |
Nonlinear pulsation masses |
| Volume: |
11, Confrontation Between Stellar Pulsation and Evolution |
| Page: |
412 |
| Authors: |
Davis, Cecil G. |
| Abstract: |
The determination of Population-I-Cepheid masses by nonlinear methods is discussed. For the lower-mass objects such as RR Lyrae and BL Her stars, general agreement is discovered using the evolutionary masses and nonlinear pulsation theory. It is pointed out that an apparent difficulty of the nonlinear pulsation theory occurs in the understanding of 'double'-mode pulsation. Consideration is given to recent studies in the nonlinear pulsation theory dealing with the question of mode selection, period doubling, and the trends toward chaotic behavior such as observed in the transition from W Virginis to RV Tauri-like stars. Focus is placed on developments in time-dependent convection, shock-resolving methods, radiative transfer, new opacities, and multiple-mode pulsation. |
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