Some interesting features in the drift pair phenomena of solar decametric radiation

Details Some interesting features in the drift pair phenomena of solar decametric radiation Some interesting features in the drift pair phenomena of solar decametric radiation

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.251..121t&link_type=abstract

In ESA Proceedings of the Joint Varenna-Abastumani International School and Workshop on Plasma Astrophysics p 121-125 (SEE N87-

Astronomy and Astrophysics

Astrophysics

Decametric Waves, Drift Rate, Solar Corona, Solar Radio Emission, Solar Spectra, Magnetic Flux, Plasma Resonance, Solar Magnetic Field

Scientific paper

Observational results on drift pair (DP) chains and vertical DP bursts in the decametric solar corona are reported. As the magnetic field in this region is predominantly open, a free energy source propagating sunward most of the time cannot explain the predominant reverse drift pair chains. The appearance of the vertical chains and DPs rules out the possibility of an agency moving in the corona causing the observed drift. Observations support the idea that the resonance layer in which the radiation is generated is different at different instants of time so that one gets a slope in the frequency-time plane. If considerable fluctuations in macroscopic parameters are assumed, it is possible to have drifts of all directions as the drift rate depends upon the medium in which the fluctuations occur. It is shown that the magnetic field decreases steeply if the density of the medium is not affected by the DP activity when the frequency drift is very high.

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