A comprehensive analysis of the loop prominence of 1981 April 27

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Solar Flares, Solar Prominences, H Alpha Line, Solar Velocity, Solar X-Rays, Sunspots

Scientific paper

A comprehensive analysis is made of morphological tracings and positional measurements of H-alpha images, white-light sunspot photographs, and chromosphere velocity field obtained at Yunnan Observatory, and hard X-ray images obtained by the Hinotori satellite, of the loop prominence of April 27, 1981. It seems likely that the observed loop is the projection of a postflare loop system, and the associated flare occurred on the rear side of the solar disk. A two-ribbon flare such as in the Kopp-Pneuman model can satisfactorily explain all the observed features. The occurrence of such a flare seems likely from the evidence given by the data.

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