Plasma radio emission of beam-plasma structures in the solar corona

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)

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.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Kontar, Professor Eduard
• Authors: Mel'Nik, V.V., and Kontar, E.P.
• Subjects: Q Science > QB Astronomy
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Solar Physics
• ISSN: 1573-093X