Solar radio bursts and acceleration of solar energy particles

Abstract

The correlation between the proton flux intensity Ip with the energies Ep > 1−100 MeV and radio burst parameters for 107 solar energetic events is considered using the observation data for 1989–2005 obtained with GOES and Wind satellites, as well as the Radio Solar Telescope Network (RSTN). It has been revealed that 73 and 77% of the events were accompanied by type-II radio bursts in the meter (m II, 25–299 MHz) and the decameter-hectometer (DH II, 20 kHz–14 MHz) wavelength ranges, respectively. The correlation coefficient between Ip and the frequency drift velocity of the type-II bursts VII did not exceed 0.40. As VII increased, the intensity of Ip increased for the m-II bursts and decreased for the DH-II bursts. Coronal shock waves accelerate protons more efficiently than interplanetary waves, and their contribution to acceleration increases with an increase in the particle energy Ep. The acceleration of solar energetic particles in the region of the flare energy release is predominant.