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Title: Short-scale variations of the solar wind helium abundance

Abrupt changes of the relative He abundance in the solar wind are usually attributed to encounters with boundaries dividing solar wind streams from different sources in the solar corona. This paper presents a systematic study of fast variations of the He abundance that supports the idea that a majority of these variations on short timescales (3-30 s) are generated by in-transit turbulence that is probably driven by the speed difference between the ion species. This turbulence contributes to the solar wind heating and leads to a correlation of the temperature with He abundance.
Authors:
; ; ; ;  [1] ; ; ;  [2]
  1. Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, 18000 Prague 8 (Czech Republic)
  2. Space Research Institute of Russian Academy of Sciences, Profsoyuznaya ul. 84/32, Moscow 117997 (Russian Federation)
Publication Date:
OSTI Identifier:
22342040
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 778; 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; ABUNDANCE; CORRELATIONS; HELIUM; SOLAR CORONA; SOLAR WIND; STREAMS; TURBULENCE; VELOCITY