Generation of a Deeply Penetrating Gravity-Like Oscillation by a Non- Resonant Second-Order Interaction of Waves
We study a non-resonant second-order interaction between an inner gravity oscillation and an unstable convection in a rotating two-layered Boussinesq fluid, the lower and the upper part of which are stably and unstably stratified, respectively. A growing gravity-like oscillation generated by this interaction has an oscillation period equal to that of its mother gravity oscillation. Its growth time is equal to that of its mother convection. The generated oscillation can penetrate deeply into the lower stable region, although its forcing effect is rapidly damped with the depth. Related solar problems are discussed briefly. Key words: g-like mode generation; g-mode; Non-resonant secondorder interaction; Sun.
Publications of the Astronomical Society of Japan
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