Relative ion Fe, C and O abundances in quiet time particle fluxes in the 23 SC

V. N. Ishkov, M. A. Zeldovich, K. Kecskeméty, Yu I. Logachev

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8 Citations (Scopus)

Abstract

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 quiet-time 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.

Original languageEnglish
Pages (from-to)757-761
Number of pages5
JournalAdvances in Space Research
Volume50
Issue number6
DOIs
Publication statusPublished - Sep 15 2012

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Keywords

  • Ion abundances
  • Particle emission
  • Solar energetic particles

ASJC Scopus subject areas

  • Aerospace Engineering
  • Astronomy and Astrophysics
  • Geophysics
  • Atmospheric Science
  • Space and Planetary Science
  • Earth and Planetary Sciences(all)

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