Depolarization of solar bursts due to scattering by low-frequency waves

Details Depolarization of solar bursts due to scattering by low-frequency waves Depolarization of solar bursts due to scattering by low-frequency waves

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989soph..119..143m&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 119, no. 1, 1989, p. 143-156.

Physics

13

Depolarization, Solar Radio Bursts, Wave Scattering, Backscattering, Ion Acoustic Waves, Plasma Radiation, Type 2 Bursts, Type 3 Bursts, Whistlers

Scientific paper

The possibility of the depolarization of the fundamental plasma emission in solar radio bursts of type I, II, and III due to scattering off low-frequency waves is considered. It is suggested that depolarization might occur in three ways: (1) one or several large-angle scatters; (2) several small-angle scatters close to the plasma level; and (3) many small-angle scatters well above the plasma level. The second possibility is shown to involve coupling between the o-mode and x-mode components through their longitudinal parts. The results support the finding of Wentzel et al. (1986) that type I emissions are most likely depolarized by large-angle scattering, and indicate that type III bursts are most likely depolarized via scattering by whistlers near the plasma level.

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