Nonlinear interactions among solar acoustic modes

Details Nonlinear interactions among solar acoustic modes Nonlinear interactions among solar acoustic modes

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...342..558k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 342, July 1, 1989, p. 558-575.

Astronomy and Astrophysics

Astrophysics

58

Acoustic Frequencies, Energy Transfer, Helioseismology, Solar Atmosphere, Solar Oscillations, Coupled Modes, Hamiltonian Functions

Scientific paper

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.

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