Physics
Scientific paper
Feb 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976soph...46..501l&link_type=abstract
Solar Physics, vol. 46, Feb. 1976, p. 501-504.
Physics
Harmonic Radiation, Longitudinal Waves, Plasma Waves, Transverse Waves, Type 2 Bursts, Type 3 Bursts, Decay Rates, Energy Conversion, Low Frequencies, Power Spectra, Radiation Measurement, Time Dependence
Scientific paper
The paper discusses some observations bearing on differences in the conversion process from longitudinal to transverse waves as reflected by differences between the time profiles of the fundamental and second-harmonic components of type II and III bursts. A simple power law is derived for the observed time profile of radiobursts at the source (without propagation effects) as a function of the time variation of the plasma waves in the corona. Differences in the observed time profiles of fundamental and harmonic components can be explained by different values for the exponent, which is equal to the ratio of the decay rate of the plasma wave to that of the fundamental or harmonic emitted wave. Different values for the exponent for type II and III bursts indicate that either the conversion mechanisms for the two types are different, or that they are the same but occur in regions having different characteristics.
Boischot Andre
Leblanc Yolanda
Lecacheux Alain
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