Cyclotron wave instability in the corona and origin of solar radio emission with fine structure. I - Bernstein modes and plasma waves in a hybrid band

Details Cyclotron wave instability in the corona and origin of solar radio emission with fine structure. I - Bernstein modes and plasma waves in a hybrid band Cyclotron wave instability in the corona and origin of solar radio emission with fine structure. I - Bernstein modes and plasma waves in a hybrid band

Aug 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975soph...43..431z&link_type=abstract

Solar Physics, vol. 43, Aug. 1975, p. 431-451.

Physics

63

Cyclotron Resonance, Fine Structure, Longitudinal Waves, Plasma Waves, Solar Corona, Solar Radio Emission, Cyclotron Radiation, Electron Energy, Magnetohydrodynamic Stability, Plasma Resonance, Solar Wind, Spectral Bands

Scientific paper

The longitudinal waves (Bernstein modes and plasma waves near the hybrid frequency) in a mixture of equilibrium coronal plasma and a small group of energetic electrons are investigated. The energetic electrons have a nonequilibrium momentum distribution inherent in trapped particles. The frequency dependence of the cyclotron instability increments is studied. Attention is paid to a significant role of the relativistic effects for the cyclotron instability of longitudinal waves. For sufficiently large velocity of nonequilibrium electrons the increments are shown to increase when the hybrid frequency coincides with one of the gyrofrequency harmonics (double plasma resonance). The results obtained are used in Parts II and III to explain 'tadpoles' and 'zebra'-pattern in solar radio bursts.

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