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Solar Radio Bursts at Low Frequencies

Published online by Cambridge University Press:  25 May 2016

J. Fainberg*
Affiliation:
Goddard Space Flight Center, Greenbelt, Md. 20771, U.S.A.

Abstract

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Properties of solar radio bursts observed by spacecraft at frequencies below several MHz are reviewed. In this frequency range most of the observed bursts are type III events (associated with particles) but several cases of type II emission (associated with shocks) have been reported. The analyses which lead to emission levels of type III solar bursts out to beyond 1 AU from the Sun also indicate that the low frequency radiation is observed at the harmonic of the emission region plasma frequency. Simultaneous particle and radio measurements imply that the bursts are generated near the leading edge of impulsive streams of solar electrons with energies extending from several hundred keV to several keV. Recent experiments measuring the direction of arrival of the radio emission allow the exciter particles to be tracked along the interplanetary magnetic field from regions near the Sun out to 1 AU.

Type
Part II The Flash Phase of Solar Flares
Copyright
Copyright © Reidel 1974 

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