Computer Science – Sound
Scientific paper
Apr 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976azh....53..380g&link_type=abstract
Astronomicheskii Zhurnal, vol. 53, Mar.-Apr. 1976, p. 380-388. In Russian.
Computer Science
Sound
1
Decay Rates, Particle Acceleration, Solar Wind, Type 3 Bursts, Electron Beams, Electrostatic Waves, Landau Damping, Radar Echoes, Time Response
Scientific paper
Zones of rapid acceleration and heating of the solar wind were found in the corona by analyzing solar radar-sounding data. The types of peculiarities which should be reflected in type III radio bursts excited in these zones are investigated. Based on a numerical solution to the equations characterizing the evolution of the spectrum of Langmuir waves excited by an electron beam in an inhomogeneous nonisothermal plasma, it is shown that the bursts should be characterized by both anomalously fast frequency drift and anomalously short duration, the latter being determined by Landau damping. It is suggested that pulsating structures or spike groups, especially those associated with type III bursts, are excited in zones of rapid heating and acceleration. It is concluded that induced plasmon scattering is not effective in these zones probably because the electron temperature exceeds the ion temperature.
Gerasimova N. N.
Gordon I. M.
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