Relative ion Fe, C and O abundances in quiet time particle fluxes in the 23 SCстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Using ACE and SOHO data the origin of quiet-time low-energy particle fluxes at 1 AU is studied in the 23rd solar cycle. One of the
selection criteria of quiet-time periods is to demand that H/He < 10 provided that periods with noticeable contribution of remnants of
gradual events have been excluded from consideration. Our results suggest different origin of 0.03–3 MeV/nucleon particles – different
seed populations accelerated and different acceleration processes. During the ascending, maximum and descending phases of solar activity
quiet-time ions consist of coronal particles accelerated to suprathermal energies in about a half of the quiet periods, the rest of quiettime
fluxes originates from particle acceleration in processes similar to those in small impulsive solar flares rich in Fe. At solar minimum the bulk solar wind particles serve as seed population.