Observations of the structure and evolution of solar flares with a soft X-ray telescope

Details Observations of the structure and evolution of solar flares with a soft X-ray telescope Observations of the structure and evolution of solar flares with a soft X-ray telescope

Nov 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975soph...45..199v&link_type=abstract

Solar Physics, vol. 45, Nov. 1975, p. 199-216.

Physics

39

Apollo Telescope Mount, Solar Flares, Solar X-Rays, Stellar Evolution, Skylab Program, Solar Heating, X Ray Spectra, X Ray Telescopes

Scientific paper

One hundred thirty-two soft X-ray flare events have been observed with the S-056 X-ray telescope aboard Skylab. The observations are summarized, and a detailed discussion of the X-ray flare structures is presented. The data indicated that soft X-rays emitted by a flare come primarily from an intense well-defined core surrounded by a region of fainter more diffuse emission. Loop structures are found to constitute a fundamental characteristic of flare cores, and arcades of loops are found to play a more important role in flare phenomena than previously thought. Size distributions of these core features are presented, and a classification scheme describing the brightest flare X-ray features is proposed. Analysis of flare evolution indicates evidence for preliminary heating and energy release prior to the main phase of the flare. Core features are found to be remarkably stable and to retain their shape throughout a flare. Most changes in the overall configuration seem to be the result of the appearance, disappearance, or change in brightness of individual features, rather than the restructuring or reorientation of these features.

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