Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988ap%26ss.147..383s&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 147, no. 2, Aug. 1988, p. 383-388.
Astronomy and Astrophysics
Astrophysics
13
Cosmic Plasma, Coupled Modes, Ion Cyclotron Radiation, Magnetoacoustic Waves, Space Plasmas, Cometary Atmospheres, Extremely Low Frequencies, Schroedinger Equation, Wave Interaction
Scientific paper
A set of three nonlinearly coupled equations governing the interaction between electromagnetic ion-cyclotron and magnetosonic waves is derived. In appropriate limiting cases, the set yields simplified equations. On the other hand, the full set of equations is used to derive a general dispersion relation for the parametric interaction of electromagnetically modulated ion-cyclotron wave packets. An analytical expression for the growth rate of the electromagnetic modulational instability is presented. The relevance of the present investigation to nonthermal electromagnetic fluctuations in astrophysical and cometary plasmas is pointed out.
Feix Gerhard
Kant Shukla Padma
Stenflo Lennart
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