Decimeter continuum radio emission from a post-flare loop

Physics

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Continuous Spectra, Coronal Loops, Decimeter Waves, Solar Flares, Solar Radio Emission, H Alpha Line, Solar Corona, Solar X-Rays, Spatial Resolution, Stellar Spectrophotometry, Time Dependence

Scientific paper

It is shown how radio observations permitted the estimation of magnetic fields in the postflare loop associated with the May 19, 1979 long-lasting burst. The strongest 20-cm burst source is associated with H-alpha brightening at 20:41 UT. A comparison of spatially-resolved microwave and soft X-ray emission connected with the flare loop event showed that, at the time of maximum 20-cm flux from the source associated spatially with the declining X-ray flare, as much as one-half of the 20-cm flux could be thermal bremsstrahlung from the X-ray postflare groups. It is suggested that this 20-cm burst emission is produced either by a thermal free-free process or by thermal/nonthermal gyroradiation.

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