Injection Profiles of Solar Energetic Particles as Functions of Coronal MassEjection Heights

摘要

Previous studies with Skylab and Solwind coronal mass ejections (CMEs) have shownthat nearly all large E > 10 MeV solar energetic particle (SEP) events are associated with fast (v > 400 km s(-1)) CMEs. We compare heights of CMEs observed on the SMM spacecraft with the flux-time profiles of five associated SEP events observed by the GOES spacecraft, including three events observed as ground level events (GLEs) by neutron monitors. The SEP injection profiles as functions of the CME heights are estimated from the 'solar release times' and the effects of interplanetary scattering. We find that the peaks of the 470 MeV to 4 GeV injection profiles of the GLEs occur when CME heights reach 5-15R(o) or greater and that the onsets occur no earlier than the maxima of the flare impulsive phases.