Analysis of the flare of May 16th, 1981 with a complex space-time structure using optical, X-ray data and radio observations

Details Analysis of the flare of May 16th, 1981 with a complex space-time structure using optical, X-ray data and radio observations Analysis of the flare of May 16th, 1981 with a complex space-time structure using optical, X-ray data and radio observations

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985baicz..36...81i&link_type=abstract

Astronomical Institutes of Czechoslovakia, Bulletin (ISSN 0004-6248), vol. 36, no. 2, 1985, p. 81-96.

Astronomy and Astrophysics

Astronomy

7

Solar Flares, Solar Radio Emission, Solar Spectra, Solar X-Rays, H Alpha Line, Shock Waves, Solar Oscillations, Solar Radio Bursts, Sunspots

Scientific paper

A comprehensive analysis of the flare event of May 16, 1981 was carried out using burst records, heliograms, and dynamic spectra of radio emission in the frequency band 1000-45 MHz. Observations of X-ray emission obtained from the Prognoz-8 satellite were also used in the analysis. Attention is given to the location and dynamic characteristics of the H-alpha knots accompanied by a complicated multicomponent time profile and a strongly varying spectrum of X-ray and microwave bursts. A substantial change in the frequency spectrum of the microwave emission was observed during the development of the flare, with the maximum shifting towards the short-wave part of the cm band when H-alpha emission approached the sunspots. In the pre-maximum phase of the flare, sharp changes in the rate of increase of soft X-rays were correlated with the brightening of existing and upsurging new knots of H-alpha emission. The radio spectra for different frequency bands are reproduced in photographic form.

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