Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976soph...46..529s&link_type=abstract
Solar Physics, vol. 46, Feb. 1976, p. 529-539; Discussion, p. 539, 540.
Astronomy and Astrophysics
Astronomy
Astronomical Models, Harmonic Radiation, Plasma Waves, Radio Scattering, Radio Sources (Astronomy), Type 3 Bursts, Hypotheses, Radiation Sources, Radiative Transfer, Stellar Models, Wave Amplification
Scientific paper
A model for the radiation source for type III solar radio bursts which includes random density fluctuations is reviewed. This methodology is applied to the burst of 28 September, 1973, 03:19 UT which is an archetype 'fundamental-harmonic' pair. It is found that for scattering inhomogeneities consistent with those necessary to explain the observed sizes of the sources, it is impossible to amplify fundamental radiation in a source with a spatially uniform energy density in plasma waves; i.e., it is impossible to interpret this burst as a 'fundamental-harmonic' pair from such a source. However, the supposed 'fundamental' has fine structure similar to type IIIb bursts and since it is very difficult to explain these features except as fundamental radiation, it is concluded that there must be small clumps of intense plasma waves in the source which allow the fundamental to be amplified.
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