Hard X-ray time profiles and acceleration processes in large solar flares

Details Hard X-ray time profiles and acceleration processes in large solar flares Hard X-ray time profiles and acceleration processes in large solar flares

Feb 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...227.1072b&link_type=abstract

Astrophysical Journal, Part 1, vol. 227, Feb. 1, 1979, p. 1072-1081.

Astronomy and Astrophysics

Astronomy

83

Acceleration (Physics), Solar Electrons, Solar Flares, Solar X-Rays, X Ray Astronomy, Electron Energy, High Energy Electrons, Stellar Models, Time Dependence

Scientific paper

The hard X-ray time profiles of the (1972) August 4 and 7 flares are investigated, taking into account a comparison of the time profiles of different energy channels. It is shown that for these flares the temporal features of the intensity profiles of higher energy channels are delayed with respect to those of channel 1. The delay time gradually increases to approximately 5 sec as the channel number increases from 1 to 5, and it jumps to approximately 15 sec for channels 6 and 7. A description is presented of a model in which the delay and other characteristics of the observed time profiles in channels 1-5 are self-consistently explained by the increase of the electron energy loss time with electron energy.

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