Repeated activity of the 0.8 1.2 GHz radio source of March 20, 1993

Details Repeated activity of the 0.8 1.2 GHz radio source of March 20, 1993 Repeated activity of the 0.8 1.2 GHz radio source of March 20, 1993

Aug 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995soph..160..121k&link_type=abstract

Solar Physics, Volume 160, Issue 1, pp.121-131

Physics

7

Scientific paper

During March 20, 1993, from 12:00 to 16:00 UT, repeated radio burst activity was observed in the 0.8 1.2 GHz frequency range. ‘Periods’ in intervals 0.1 0.5, 0.7 1.0, 2.8 3.9, 75 170 s, and 15 25 min were recognized. This long-lasting narrowband activity consisted mainly of pulsations and continua. In some intervals it was accompanied not only by spikes, broadband pulsations, and fibers in the 1 2 GHz frequency range, but also by type III and U burst activity at lower frequencies as well as by hard X-ray bursts. From several radio bursts, two characterized by different fine structures were selected and compared. The observed differences are explained by different distribution functions of superthermal electrons. The position of the 0.8 1.2 GHz radio source above the photosphere and the magnetic field in the fiber burst source were estimated to be 66 000 75 000 km and 120 135 G, respectively.

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