Computer Science – Sound
Scientific paper
May 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...408..720r&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 408, no. 2, p. 720-734.
Computer Science
Sound
83
Electrostatic Waves, Ion Acoustic Waves, Solar Wind, Type 3 Bursts, Coupling Coefficients, Damping, International Sun Earth Explorers, Stochastic Processes, Wave Propagation, Weak Energy Interactions
Scientific paper
The study traces the evolution of Langmuir and ion-sound waves in type III sources, incorporating linear growth, linear damping, and nonlinear electrostatic decay. Improved estimates are obtained for the wavenumber range of growing waves and the nonlinear coupling coefficient for the decay process. It is shown that the conditions in the solar wind do not allow a steady state to be attained; instead, bursty linear and nonlinear interactions take place, consistent with the highly inhomogeneous and impulsive waves actually observed. Nonlinear growth is found to be rapid enough to saturate the growth of the parent Langmuir waves in the available interaction time. The competing processes of nonlinear wave collapse and quasi-linear relaxation are discussed, and it is concluded that neither is responsible for the saturation of Langmuir growth.
Cairns Iver H.
Robinson Adam P.
Willes Andrew J.
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