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Multimode Resonant Coupling in Pulsating Stars
Rafal M. Nowakowski
We consider evolution of an unstable acoustic mode interacting with an ensemble of stable g-modes. We show that the static multimode solution does not exist. We then find the condi…
Nonlinearity of nonradial modes in evolved stars
Rafal M. Nowakowski, Wojciech A. Dziembowski
We show that in evolved stars, even at relatively low surface amplitudes, nonradial modes become strongly nonlinear in the hydrogen shell source, where the Brunt-Vaisala frequency…
Resonant Excitation of Nonradial Modes in RR Lyrae Stars
Rafal M. Nowakowski
A nonlinear development of radial pulsation instability to a resonant excitation of nonradial modes is studied. The theory covers the cases of axisymmetric (m=0) modes as well as (…
Resonant Excitation of Nonradial Modes in RR Lyr Stars
Rafal M. Nowakowski, Wojciech A. Dziembowski
We study a nonlinear development of radial pulsation instability to a resonant excitation of nonradial modes. Our theory covers the cases of axisymmetric (m=0) modes as well as (m,…