NOZOMI OBSERVATION OF INTERPLANETARY TRANSIENTS EJECTED AS LIMB CORONAL MASS EJECTIONS

摘要

The magnetic fields of interplanetary objects that were ejected as coronal mass ejections (CMEs) from the limb of the Sun were observed by the NOZOMI spacecraft at 1.38 AU above the east limb of the Sun. The solar wind magnetic field whose launch time coincided with ejection of the limb CME was different from that estimated from ACE observations near the Earth, suggesting that NOZOMI encountered transient magnetic structures. The interplanetary magnetic field showed a complicated structure with a wide range of variations from event to event. The convection speeds of the transients estimated from their travel times were less distributed compared with the initial speeds of CMEs.