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Title: Note on one-fluid modeling of low-frequency Alfvénic fluctuations in a solar wind plasma with multi-ion components

A simple point of view that non-zero Alfvén ratio (residual energy) appears as a consequence of one-fluid modeling of uni-directional Alfvén waves in a solar wind plasma is presented. Since relative speeds among ions are incorporated into the one-fluid model as a pressure anisotropy, the Alfvén ratio can be finite due to the decrease in the phase velocity. It is shown that a proton beam component typically found in the solar wind plasma can contribute to generating non-zero Alfvén ratio observed in the solar wind plasma. Local equilibrium velocity distribution functions of each ion component are also discussed by using maximum entropy principle.
Authors:
 [1] ;  [2] ;  [3] ;  [4]
  1. Faculty of Human Development, University of Toyama, 3190, Toyama City, Toyama 930-8555 (Japan)
  2. Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya, Aichi 464-8601 (Japan)
  3. Department of Physics, Nagoya University, Furo-cho, Nagoya, Aichi 464-8602 (Japan)
  4. Department of Earth System Science and Technology, Kyushu University, 6-1, Kasuga City, Fukuoka 816-8580 (Japan)
Publication Date:
OSTI Identifier:
22489986
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 12; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ALFVEN WAVES; ANISOTROPY; DISTRIBUTION FUNCTIONS; ENTROPY; IONS; PHASE VELOCITY; PLASMA; PROTON BEAMS; SIMULATION; SOLAR WIND