Optical counterpart of the radio event accompanying the 3B flare of 13 May 1981

Details Optical counterpart of the radio event accompanying the 3B flare of 13 May 1981 Optical counterpart of the radio event accompanying the 3B flare of 13 May 1981

Mar 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983soph...83..257l&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 83, March 1983, p. 257-266.

Physics

5

H Alpha Line, Radio Spectra, Solar Flares, Spectroheliographs, Type 3 Bursts, Astronomical Photography, Brightness Discrimination, Magnetic Flux, Solar Observatories, Transient Response

Scientific paper

The association between solar flares and radio events is investigated using observations of the large and complicated 3B flare in which there appears to be clear evidence relating two simultaneous H-alpha brightenings in an area outside the main flair to the onset of emission over much of the radio spectrum. The flare occurred on 13 May 1981 and was observed simultaneously with the radioheliograph, radiospectrograph, and the 30 cm optical telescope at the CSIRO Solar Observatory. Results show that excepting intermittent type III activity, all the radio events over the frequency range 8-8000 MHz accompanying the initial stage of the flare had their onset in a two-minute interval immediately preceding the peak of an impulsive H-alpha brightening (kernel) well away from the main flare. The kernel is shown to be one footpoint of a loop of magnetic flux whose other end terminated in a transient brightening in an adjacent active region.

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