Abstract Approximately 180 major X-ray flares that occurred between September 1977 and May 1984 have been examined to determine some of the outstanding trends and collective properties that characterize this set of large events. This study concentrates only on the distribution of the maximum emission measure and the distribution of maximum electron temperature with respect to the maximum radiative flux in soft X-rays generated by the flare. Two unusual, but apparently related, phenomena appear to be revealed by these empirical relationships. The first of these is a linear dependence of the lower limit of the log emission measure with respect to the maximum flare X-ray flux. The second is the presence of two events arising from the same active region that prove the exception to the rule. One of these special events produced a thermal temperature of 60 MK.
The empirical relationship of peak emission measure and temperature to peak flare X-ray flux during solar cycle 21
Advances in Space Research ; 8 , 11 ; 157-160
1989-01-01
4 pages
Article (Journal)
Electronic Resource
English
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