Multiple loop activations and continuous energy release in the solar flare of June 15, 1973

Details Multiple loop activations and continuous energy release in the solar flare of June 15, 1973 Multiple loop activations and continuous energy release in the solar flare of June 15, 1973

Dec 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977soph...55..431w&link_type=abstract

Solar Physics, vol. 55, Dec. 1977, p. 431-453.

Physics

36

Energy Transfer, High Temperature Plasmas, Solar Activity Effects, Solar Flares, Spectroheliographs, Activation Energy, Electron Energy, Far Ultraviolet Radiation, Filtergrams, Hydrogen Ions, Iron, Magnetohydrodynamic Stability, Radiative Transfer, Skylab Program, Solar Corona, Solar Physics, Solar X-Rays

Scientific paper

The spatial and temporal evolution of the high-temperature plasma in the solar flare of June 15, 1973, is studied using XUV spectroheliograms and X-ray filtergrams obtained from Skylab. The analysis focuses on the changing forms and brightness of Fe XXIII 263-A and Fe XXIV 255-A images. Temperatures and emission measures computed for different times during the flare are compared with those derived from Solrad-9 flux data, the electron temperature in the bright compact core of the Fe XXIV image is determined, and a coronal origin is suggested for this bright core. The observational evidence shows that the overall flare event involved a number of different preexisting loops and arches which were activated in succession. The activation and heating are found to have persisted well past the end of the burst phase, implying that the energy release did not end when the impulsive phase was over. The overall development of the flare is summarized on the basis of the observed order of appearance of the loops.

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