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- Title
Solar Energetic Particles and Intensity of Metric Type II Radio Bursts.
- Authors
Tsap, Yuriy T.; Isaeva, Elena A.; Kopylova, Yulia G.
- Abstract
We perform a statistical analysis of 112 proton events from 24 November 2000 to 20 December 2014, accompanied by an increase in the intensity of solar energetic particles (SEPs) with energy E p > 1 –850 MeV using GOES data. All events were accompanied by metric type II radio bursts in the frequency range of 25–180 MHz observed with the Radio Solar Telescope Network. A correlation in the peak proton integral intensity I p with the intensity of type II radio bursts I i and the frequency drift rate V is shown. Taking into account the helio-longitudinal weakening, i.e. the dependence of SEP intensity on the heliographic longitude of the flare, we find that the correlation coefficients between I p and I i , as well as between I p and V for protons with E p > 30 MeV are 0.79 and 0.71, respectively. This suggests that non-thermal electrons, which drive type II radio bursts, and energetic protons are generated at the front of the same shock wave. The correlation coefficients mentioned above decrease for E p ≳ 100 MeV. Therefore, the contribution of high energetic protons to the integral intensity I p is rather determined by accelerated processes in the flare energy release region. The weak dependence of SEP intensity on the helio-longitudinal weakening is discussed.
- Subjects
SOLAR energetic particles; SOLAR telescopes; VERY large array telescopes; RADIO telescopes; RADIO frequency
- Publication
Solar Physics, 2024, Vol 299, Issue 1, p1
- ISSN
0038-0938
- Publication type
Article
- DOI
10.1007/s11207-023-02247-x