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Paper: Association of Coronal Mass Ejections and Type II Radio Bursts with Impulsive Solar Energetic Particle Events
Volume: 325, The Solar-B Mission and the Forefront of Solar Physics
Page: 401
Authors: Yashiro, S.; Gopalswamy, N.; Cliver, E.W.; Reames, D.V.; Kaiser, M.L.; Howard, R.A.
Abstract: We report the association of impulsive solar energetic particle (SEP) events with coronal mass ejections (CMEs) and metric type II radio bursts. We identified 38 impulsive SEP events using the WIND/EPACT instrument and their CME association was investigated using white light data from SOHO/LASCO. We found that (1) at least ~ 28-39% of impulsive SEP events were associated with CMEs, (2) only 8-13% were associated with metric type II radio bursts. The statistical properties of the associated CMEs were investigated and compared with those of general CMEs and CMEs associated with large gradual SEP events. The CMEs associated with impulsive SEP events were significantly slower (median speed of 613 kms−1) and narrower (49 deg) than those of CMEs associated with large gradual SEP events (1336 kms−1, 360 deg), but faster than the general CMEs (408 kms−1).
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