A new approach for predicting proton events

Details A new approach for predicting proton events A new approach for predicting proton events

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.223..877j&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 223, Dec. 15, 1986, p. 877-884. Research supported by t

Statistics

Methodology

3

Particle Emission, Proton Protuberances, Solar Flares, Solar Protons, H Alpha Line, Predictions, Solar Cosmic Rays, Solar Magnetic Field, Sunspots

Scientific paper

A statistical, comparative study to investigate the association of particle emission with 315 two-ribbon (TR) and 1964 nontwo-ribbon N flares, occurring during 1976-80 is carried out. The important results obtained are: (1) the N-subflares do not give rise to any particle (electrons, protons and alpha-nuclei) emission at all; (2) association of TR flares with electrons (1-5 MeV) and low energy protons (0.16-0.32 MeV) is 8-10 times higher as compared with that of N-flares; (3) the TR-flares show good correlation with high energy protons (13.7-80 MeV) and alpha-nuclei (11-90) MeV/nucl) while N-flares do not show any association. This implies that TR-flares are strong flares, and that only they can emit energetic particles. Using these results, and earlier results of Svestka (1976) and Jain (1983, 1985), a methodology has been proposed for predicting as to when an H-alpha flare will be a proton flare or cosmic-ray flare. The complex magnetic configuration with strong magnetic field gradients generating TR-flares seems to be responsible for giving high association of TR-flares with energetic particle emission.

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