A scattering hypothesis for type V solar radio bursts

Details A scattering hypothesis for type V solar radio bursts A scattering hypothesis for type V solar radio bursts

Sep 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974pasau...2..261m&link_type=abstract

(Astronomical Society of Australia, Annual General Meeting, 8th, Hobart, Australia, May 22-24, 1974.) Astronomical Society of Au

Physics

7

Electron Scattering, Solar Physics, Type 5 Bursts, Whistlers, Brightness Temperature, Magnetoionics, Plasma Radiation, Trapped Particles

Scientific paper

The hypothesis is advanced that electron streams injected into a magnetic loop give rise to type V solar radio bursts if the streaming electrons experience effective resonant scattering by whistlers; otherwise, U-bursts result. For this hypothesis to be valid, the whistlers must be generated by a pre-existing anisotropic distribution of trapped electrons. It is noted that the hypothesis attributing the distinction between type V and U-bursts to injection conditions is unsatisfactory, especially its supposition of a mirror point near the injection point for type V bursts. Implications of the scattering hypothesis are discussed, including the necessity of activity involving energetic particles preceeding type V bursts, the possibility that U-bursts precede type V bursts, and a limit of several times 10 to the 10th K for the maximum brightness temperature of type V bursts.

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