Fundamental and Harmonic Emission in Type III Solar Radio Bursts - II. Dominant Modes and Dynamic Spectra

Details Fundamental and Harmonic Emission in Type III Solar Radio Bursts - II. Dominant Modes and Dynamic Spectra Fundamental and Harmonic Emission in Type III Solar Radio Bursts - II. Dominant Modes and Dynamic Spectra

Aug 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998soph..181..395r&link_type=abstract

Solar Physics, v. 181, Issue 2, p. 395-428 (1998).

Physics

42

Scientific paper

Recent theoretical estimates of the emissivity of fundamental and harmonic radiation in type III solar radio bursts are combined with calculations of electron beam evolution, radiation scattering and propagation delays to estimate dynamic spectra at a remote observer. The burst intensity, brightness temperature, temporal evolution, and dominant mode of emission are then calculated. A simple explanation of the recently observed low-frequency cutoff to type III emission is found and it is noted that some type III beams may propagate without significant radio emission. Criteria for observation of harmonic structure in dynamic spectra are also obtained. The results are shown to be consistent with a wide range of observations.

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