Solar Oscillations: Generation of a g-Mode by Two p-Modes
Abstract
Three modes of solar oscillations can be coupled resonantly by the nonlinear terms in the equations of motion. A general integral for the coupling rate was derived by Dziembowski. The author evaluates the coupling of two p-modes, of nearly identical frequencies, so as to generate a g-mode. The coupling occurs primarily in the convection zone. A rather select set of g-modes of suitably low order and degree and with weak linear damping may grow, but the modes saturate when surface amplitudes are still unobservably small.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- August 1987
- DOI:
- 10.1086/165513
- Bibcode:
- 1987ApJ...319..966W
- Keywords:
-
- Equations Of Motion;
- Resonant Frequencies;
- Solar Oscillations;
- Stellar Interiors;
- Coupling;
- Eigenvectors;
- Energy Transfer;
- Nonlinear Systems;
- Plasma Physics;
- Solar Physics;
- SUN: INTERIOR;
- SUN: OSCILLATIONS