Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976a%26a....47...31h&link_type=abstract
Astronomy and Astrophysics, vol. 47, no. 1, Feb. 1976, p. 31-41.
Astronomy and Astrophysics
Astrophysics
8
Astronomical Models, Electron Energy, Energy Spectra, Solar Electrons, Type 3 Bursts, Decay Rates, Landau Damping, Plasma Waves, Solar Wind
Scientific paper
An attempt is made to explain the observed frequency-time profiles of type III solar radio bursts in terms of a rapid plasma-wave decay rate combined with the exciter model recently proposed by Harvey (1975). The decay rate is assumed to be sufficiently rapid for the plasma-wave energy-density profile to be similar to the exciter power-density time profile; this is consistent with the exciter model, where the rapid decay is caused by Landau damping of the electrons in the modified high-energy tail of the ambient plasma electron-velocity distribution. The model is compared with radio observations by making simple assumptions about the dependence of the radio intensity on the plasma wave energy. A comparison is made with simultaneous radio and electron observations by further assuming a simple power-law velocity distribution for the electrons at their point of ejection from the sun.
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