Size Distrtibutions of the >10 MeV Solar Proton Events

Details Size Distrtibutions of the >10 MeV Solar Proton Events Size Distrtibutions of the >10 MeV Solar Proton Events

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001soph..202..151m&link_type=abstract

Solar Physics, v. 202, Issue 1, p. 151-171 (2001).

Physics

6

Scientific paper

As has been recognized recently, data on size (frequency) distributions for different sets of solar flare parameters are very helpful in modeling flare and acceleration processes. Relying upon a new arising paradigm of particle acceleration at different sources at/near the Sun (flares, shock waves, etc.), in this paper, we analyze long-term data (1955-1996) from several Catalogues of Solar Proton Events (SPEs). Above 1 p.f.u. (proton cm^-2 s^-1 sr^-1) of the >10 MeV protons, we have separated in all 320 events associated with identified sources (flares). Then, within this database of flare-related events, a second group (a subgroup) has been formed of the 159 events, additionally having a certain or probable sudden storm commencement (SSC) association (SSC-related events). The basic result is that the power-law slope of size distribution for the 320 flare-related events at integral energy intensities is about 1.37 +/- 0.05 over the entire range of the proton intensities, from 1.0 to 10^5 p.f.u. This slope is in general agreement with earlier analyses of integral energy distributions, but steeper than that for differential energy distributions. A second result is that the SSC-associated events have a double power-law distribution with two different exponents, near 1.00 +/- 0.04 and 1.53 +/- 0.03 below and above 10^3 p.f.u., respectively. The longitude distributions of the proper sources for these two groups display different behaviour suggesting different origins of the two particle populations. A certain difference was also found to exist in the slopes of integral size distributions at >10 MeV and >500 MeV. This may point to a dependence of slope on the proton energy under consideration.

Affiliated with

Also associated with

No associations

Rating

Size Distrtibutions of the >10 MeV Solar Proton Events does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Size Distrtibutions of the >10 MeV Solar Proton Events, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Size Distrtibutions of the >10 MeV Solar Proton Events will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-819686