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Equatorial Magnetosonic Waves: Do Nonlinear Interactions Play a Role in Their Evolution?
Author(s) -
Walker S. N.,
Balikhin M. A.,
Yearby K. H.,
Aryan H.
Publication year - 2020
Publication title -
journal of geophysical research: space physics
Language(s) - English
Resource type - Journals
eISSN - 2169-9402
pISSN - 2169-9380
DOI - 10.1029/2019ja027572
Subject(s) - bicoherence , nonlinear system , physics , function (biology) , plasma , statistical physics , geophysics , computational physics , bispectrum , quantum mechanics , computer science , biology , telecommunications , spectral density , evolutionary biology
The occurrence of nonlinear interactions between discrete wave frequencies has been shown to play a significant role in the propagation and evolution of some plasma wave modes. In this paper we take advantage of closely spaced Cluster measurements to investigate the possibility nonlinear interactions occurring between the discrete emissions that are observed in a region of Equatorial Magnetosonic Wave generation. Based on transfer function analysis, it is shown that the role of nonlinear interactions plays a negligible role in the wave evolution as the emissions propagate from one satellite to the other. A bicoherence analysis of the individual signals also fails to find the existence of nonlinear interactions in the evolution of equatorial magnetosonic waves.