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On the reliability of peak-flux distributions, with an application to solar flares View all abstracts by submitter

Arnold O. Benz   Submitted: 2001-06-28 01:30

Narrow-band radio spikes have been recorded during a solar flare with unprecedented resolution. This unique example allows us to study the effect of low resolution in previously published peak-flux distributions of radio spikes. We give a general, analytical expression for how an actual peak-flux distribution is changed in shape if the peaks are determined with low temporal and/or frequency resolution. It turns out that, generally, low resolution tends to cause an exponential behavior at large flux values if the actual distribution is of a power-law shape. The distribution may be severely altered if the burst-duration depends on the peak-flux. The derived expression is applicable also to peak-flux distributions derived at other wavelengths (e.g. soft and hard X-rays, EUV). We show that for the analyzed spike-event the resolution was sufficient for a reliable peak flux distribution. It can be fitted by generalized power-laws or by an exponential. Keywords: Acceleration of particles - Methods: statistical - Sun: flares - Sun: corona - Sun: radio radiation

Authors: H. Isliker and A.O. Benz
Projects: None

Publication Status: A&A 375, 1040 - 1048(2001)
Last Modified: 2005-11-21 03:33
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