Nonlinear Interactions among Solar Acoustic Modes
Abstract
The rates at which nonlinear interactions transfer energy among the normal modes of a plane-parallel, stratified atmosphere are evaluated. It is shown that every p-mode in the 5-minute band is involved in many near-resonant triplets, and, as a consequence, the energy transfer rates are independent of the mode line widths. It is also found that nonlinear mode coupling cannot limit the growth of overstable p-modes, which favors the hypothesis that the sun's p-modes are stochastically excited by turbulent convection.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- July 1989
- DOI:
- 10.1086/167616
- Bibcode:
- 1989ApJ...342..558K
- Keywords:
-
- Acoustic Frequencies;
- Energy Transfer;
- Helioseismology;
- Solar Atmosphere;
- Solar Oscillations;
- Coupled Modes;
- Hamiltonian Functions;
- Solar Physics;
- CONVECTION;
- SUN: ATMOSPHERE;
- SUN: ATMOSPHERIC MOTIONS;
- SUN: OSCILLATIONS