Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ap%26ss.111..325l&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 111, no. 2, April 1985, p. 325-334.
Astronomy and Astrophysics
Astrophysics
1
Electron Plasma, Low Frequencies, Magnetohydrodynamic Stability, Plasma-Electromagnetic Interaction, Solar Wind, Whistlers, Electric Field Strength, Electromagnetic Noise, Electron Energy, Electron Oscillations, Interplanetary Magnetic Fields, Plasma Drift, Plasma Resonance
Scientific paper
A fully electromagnetic lower hybrid instability which is driven by a resonant halo electron component is studied analytically. It is shown that the growth rate of the instability peaks at a certain value of the wave-number and that an increase in the ratio of electron pressure to magnetic field pressure reduces the growth rate. At 0.3 AU the typical growth time for the instability is found to be of the order of 25 ms or less, whereas the most unstable wavelengths associated with the instability fall typically in a range of 27 to 90 km. Relevance of electromagnetic lower hybrid instability to the obliquely propagating whistler, characterized by large values of refractive indices, detected behind interplanetary shocks in the solar wind and to the generation mechanism of correlated whistler and electron-plasma oscillation bursts detected on ISEE-3 are discussed.
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