Decimetric type III radio bursts and associated hard X-ray spikes

Details Decimetric type III radio bursts and associated hard X-ray spikes Decimetric type III radio bursts and associated hard X-ray spikes

Feb 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984soph...90..383d&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 90, Feb. 1984, p. 383-399. Research supported by the Science and Engineering Research Counc

Physics

38

Decimeter Waves, Solar Flares, Solar X-Rays, Type 3 Bursts, Radio Spectra, Solar Electrons, Solar Maximum Mission, Solar Spectrometers

Scientific paper

For a relatively weak solar flare on August 6, 1981, at 10:32 UT, a detailed comparison is made between hard X-ray spikes and decimetric type III radio bursts. The hard X-ray observations are made at energies above 30 keV, and the radio data are obtained in the frequency range from 100 to 1000 MHz. The time resolution for all the data sets is approximately 0.1 s or better. The dynamic radio spectrum exhibits many fast drift type III radio bursts with both normal and reverse slope, whereas the X-ray time profile contains many well resolved short spikes with durations less than or equal to 1 s. Some of the X-ray spikes are seen to be associated in time with reverse-slope bursts, indicating either that the electron beams producing the radio burst contain two or three orders of magnitude more fast electrons than has previously been assumed or that the electron beams can induce the acceleration of additional electrons or occur in coincidence with this acceleration. A case is presented in which a normal slope radio burst at approximately 600 MHz occurs in coincidence with the peak of an X-ray spike to within 0.1 s.

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