On the Relationship of Solar Energetic Particles with Metric Type II Radio Bursts.

According to the data from the GOES satellites and the SRS solar radio spectrograph, 112 proton events were analyzed for the time interval from November 24, 2000 to December 20, 2014, accompanied by an increase in the intensity of solar energetic particles (protons) Ip with energies Ep > 1–850 MeV and type II radio bursts in the range of 25–180 MHz. A correlation was found for the proton intensity Ip with the intensity of type II radio bursts Ii and the frequency drift rate V. The correlation coefficients between Ip and Ii, as well as between Ip and V, reach approximately 0.82 and 0.67, respectively. The correlation decreases quite sharply at Ер > 100 MeV. Nonthermal electrons responsible for type II radio bursts and energetic protons are generated at the fronts of the same shock waves, while the acceleration of relativistic particles with Ер > 100 MeV is determined by nonthermal processes in the region of flare energy release. [ABSTRACT FROM AUTHOR]