Fundamental and harmonic radiation in solar type III bursts

Details Fundamental and harmonic radiation in solar type III bursts Fundamental and harmonic radiation in solar type III bursts

Feb 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976soph...46..493s&link_type=abstract

Solar Physics, vol. 46, Feb. 1976, p. 493-496; Discussion, p. 496-498.

Physics

7

Harmonic Radiation, Plasma Radiation, Solar Storms, Type 3 Bursts, Circular Polarization, Diffuse Radiation, High Frequencies, Low Frequencies, Plasma Frequencies, Polarization Characteristics

Scientific paper

The paper discusses indirect evidence that (1) some type III burst radiation is fundamental plasma radiation and that (2) type III radiation is at times emitted simultaneously as fundamental and second-harmonic plasma radiation. The systematic and prolonged contiguity of the frequency ranges of type I and type III storm bursts suggests that type III bursts must be interpreted as being emitted at the fundamental plasma frequency, if one accepts Melrose's (1975) argument that polarization properties of type I bursts can only be interpreted in terms of fundamental plasma radiation. Sharp features of some type III bursts are more strongly circularly polarized than their diffuse portions of the bursts, which can be attributed to the fact that the fundamental plasma radiation can be strongly circularly polarized, while second-harmonic radiation cannot. Type III backbone structure can be interpreted in the same way as type II herringbone structure: as simultaneous emission of fundamental and second-harmonic plasma radiation.

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