Comparison of theoretically predicted and observed Solar Maximum Mission X-ray spectra for the 1980 April 13 and May 9 flares

Details Comparison of theoretically predicted and observed Solar Maximum Mission X-ray spectra for the 1980 April 13 and May 9 flares Comparison of theoretically predicted and observed Solar Maximum Mission X-ray spectra for the 1980 April 13 and May 9 flares

Jul 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...258..367s&link_type=abstract

Astrophysical Journal, Part 1, vol. 258, July 1, 1982, p. 367-372.

Astronomy and Astrophysics

Astrophysics

3

Solar Flares, Solar Maximum Mission, Solar Temperature, Solar X-Rays, X Ray Spectra, Periodic Variations, Solar Spectra, Solar Spectrometers

Scientific paper

A method for predicting the hard X-ray spectrum in the 10-100 keV range for compact flares during their initial rise is developed on the basis of a thermal model. Observations of the flares of 1980 April 13, 4:05 U.T., and 1980 May 9, 7:12 U.T. are given and their combined spectra from the Hard X-ray Burst Spectrometer and Hard X-ray Imaging Spectrometer on the Solar Maximum Mission are deduced. Constraints on the cross sectional area of the supposed emitting arch are obtained from data from the Hard X-ray Imaging Spectrometer. A power-law spectrum is predicted for the rise of the flare of April 13 for initial arch densities less than 10 to the 10th per cu cm and also for the flare of May 9 for initial arch densities less than 5.4 x 10 to the 10th per cu cm. In both cases power-law spectra are observed. Limitations and implications of these results are discussed.

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