Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...251..364l&link_type=abstract
Astrophysical Journal, Part 1, vol. 251, Dec. 1, 1981, p. 364-373.
Astronomy and Astrophysics
Astrophysics
206
Electron Distribution, High Energy Electrons, Plasma Waves, Type 3 Bursts, Distribution Functions, Satellite Observation
Scientific paper
Detailed in situ observations from the ISEE 3 spacecraft of energetic electrons, plasma waves, and radio emission for the type II solar radio burst of February 17, 1979, are presented. The reduced, one-dimensional electron distribution function is constructed as a function of time. Since the faster electrons arrive before the slower ones, a bump on tail distribution forms which is unstable to the growth of Langmuir waves. The plasma wave growth computed from the distribution function agrees well with the observed onset of the Langmuir waves, and there is qualitative agreement between variations in the plasma wave levels and in the development of regions of positive slope in the function. The evolution of the function, however, predicts far higher plasma wave levels than those observed. The maximum levels observed are approximately equal to the threshold for nonlinear wave processes, such as oscillation two-stream instability and soliton collapse.
Gurnett Donald A.
Lin Robert P.
Potter D. W.
Scarf Frederick L.
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