Plasma radio emission of beam-plasma structures in the solar corona (original) (raw)

Mel'Nik, V.V. and Kontar, E.P.(2003) Plasma radio emission of beam-plasma structures in the solar corona.Solar Physics, 215(2), pp. 335-341. (doi: 10.1023/A:1025689116449)

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Publisher's URL: http://dx.doi.org/10.1023/A:1025689116449

Abstract

Recent progress in the description of electron beam propagation in a plasma allows us to obtain explicit expressions for Langmuir turbulence generated by the beam. Radio emission of an electron beam accompanied by Langmuir turbulence (beam-plasma structure – BPS), propagating in the solar corona is considered within the plasma emission mechanism. The maximum brightness temperatures of a BPS radio emission with velocity vBPS ≈ 0.35 c at fundamental and harmonic frequencies are found to be equal to TF = 1013 K, TH = 1016 K, respectively. It is shown that the temperature of radio emission sharply declines with the decrease of BPS velocity. The dominant drift velocity of Type III sources (≈ 0.3 c) and broad range of observable brightness temperatures are naturally explained by the latter fact.

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