Electron cyclotron maser instability in the solar corona - The role of superthermal tails

Details Electron cyclotron maser instability in the solar corona - The role of superthermal tails Electron cyclotron maser instability in the solar corona - The role of superthermal tails

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...290..347v&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 290, March 1, 1985, p. 347-352.

Astronomy and Astrophysics

Astrophysics

16

Electron Cyclotron Heating, High Energy Electrons, Magnetohydrodynamic Stability, Masers, Solar Corona, Solar Flares, Electron Energy, Laser Modes, Microwave Frequencies, Particle Acceleration, Radio Emission, Solar Oscillations, Solar Radiation

Scientific paper

The effect of a superthermal component of electrons on the loss-cone-driven electron cyclotron maser instability is analyzed. It is found that for a superthermal tail with temperature about 10 KeV, the first harmonic (X- and O-mode) is suppressed for n(t)/n(r) of about 1 (n/t/ and n/r/ are the densities of superthermal tail and loss-cone electrons) and the second harmonic (X- and O-modes) is suppressed for n(t)/n(r) less than about 0.1. A qualitative discussion on the formation of superthermal tails is presented and it is suggested that superthermal tails play an important role on the observed or available power, at microwave frequencies, from the electron cyclotron maser instability in the solar corona.

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