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Title: EVIDENCE FOR LOCAL ACCELERATION OF SUPRATHERMAL HEAVY ION OBSERVATIONS DURING INTERPLANETARY CORONAL MASS EJECTIONS

Suprathermal particles are an important seed population for a variety of energetic particles found throughout the heliosphere, but their origin is in debate. We present, for the first time, high-cadence observations of suprathermal heavy ions during interplanetary coronal mass ejections (ICMEs), from the Suprathermal Ion Composition Spectrometer on board the Wind spacecraft, and investigate their ionic composition and compare it to the bulk solar wind plasma composition, observed from the Solar Wind Ion Composition Spectrometer on board the Advanced Composition Explorer. We find that the composition of the suprathermal plasma is related to the local bulk solar wind plasma and not to the plasma upstream of the ICME. This implies that the suprathermal plasma is accelerated from the local bulk solar wind plasma and not the upstream solar wind plasma.
Authors:
; ;  [1] ;  [2]
  1. Department of Atmospheric, Oceanic, and Space Sciences, University of Michigan, Ann Arbor, MI 48109 (United States)
  2. NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States)
Publication Date:
OSTI Identifier:
22364474
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 799; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ACCELERATION; COMPARATIVE EVALUATIONS; HEAVY IONS; HELIOSPHERE; MASS; ORIGIN; PLASMA; SOLAR CORONA; SOLAR WIND; SUN