Open AccessCorrelation of near-Earth proton enhancements >100 MeV with parameters of solar microwave bursts
Author(s) -
V. V. Grechnev,
V. V. Grechnev,
V. I. Kiselev,
V. I. Kiselev,
N. S. Meshalkina,
N. S. Meshalkina,
I. M. Chertok,
I. M. Chertok
Publication year - 2017
Publication title -
solnečno-zemnaâ fizika
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.11
H-Index - 2
ISSN - 2412-4737
DOI - 10.12737/szf-33201701
Subject(s) - physics , microwave , solar flare , proton , flare , coronal mass ejection , acceleration , astrophysics , solar energetic particles , computational physics , nuclear physics , solar wind , plasma , classical mechanics , quantum mechanics
We analyze the relations between various combinations of peak fluxes and fluences of solar microwave bursts at 35 GHz recorded with the Nobeyama Radio Polarimeters during 1990–2015, and corresponding parameters of proton enhancements with E>100 MeV exceeding 0.1 pfu registered by GOES monitors in near-Earth environment. The highest correlation has been found between the microwave and proton fluences. This fact reflects a dependence of the total number of protons on the total duration of the acceleration process. In the events with strong flares, the correlation coefficients of proton fluences with microwave and soft X-ray fluences are higher than those with speeds of coronal mass ejections. The results indicate a statistically larger contribution of flare processes to acceleration of high-energy protons. Acceleration by shock waves seems to be less important at high energies in events associated with strong flares, although its contribution probably prevails in weaker events. The probability of a detectable proton enhancement was found to directly depend on the peak flux and duration of the microwave burst, that can be used for diagnostics of proton enhancements based on microwave observations.