On the damping of type III solar radio bursts

Details On the damping of type III solar radio bursts On the damping of type III solar radio bursts

Oct 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982pazh....8..573l&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 8, Sept. 1982, p. 573-576) Soviet Astronomy Letters (ISSN 0360-0327), vol. 8, Sept.-Oct

Astronomy and Astrophysics

Astronomy

2

Damping, Plasma Waves, Plasma-Particle Interactions, Type 3 Bursts, Cyclotron Radiation, Time Dependence

Scientific paper

It is found that the meter and decameter-wavelength damping of type III bursts on the sun may be attributable to the stabilization of the Langmuir-waved instability of the fast electron streams through excitation of cyclotron branch plasma waves. The possibility that a damping mechanism can opeate for noise-storm type III bursts in the frequency range from 1-100 MHz is examined. The critical relative density of the fast-electron streams is estimated such that cyclotron-branch excitation will serve to damp the Cherenkov branch of plasma waves if the critical relative density is exceeded. It is shown that type III bursts can be damped through cyclotron-branch excitation by the fast-electron stream within the meter and much of the decameter wavelength region, based on estimates of the electron-stream density in the lower and middle corona.

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