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Title: Nonlinear interaction of proton whistler with kinetic Alfvén wave to study solar wind turbulence

This paper presents the nonlinear interaction between small but finite amplitude kinetic Alfvén wave (KAW) and proton whistler wave using two-fluid model in intermediate beta plasma, applicable to solar wind. The nonlinearity is introduced by modification in the background density. This change in density is attributed to the nonlinear ponderomotive force due to KAW. The solutions of the model equations, governing the nonlinear interaction (and its effect on the formation of localized structures), have been obtained using semi-analytical method in solar wind at 1AU. It is concluded that the KAW properties significantly affect the threshold field required for the filament formation and their critical size (for proton whistler). The magnetic and electric field power spectra have been obtained and their relevance with the recent observations of solar wind turbulence by Cluster spacecraft has been pointed out.
Authors:
;  [1] ;  [2] ;  [3]
  1. Centre for Energy Studies, Indian Institute of Technology, Delhi-110016 (India)
  2. NASA Goddard Space Flight Centre, Code 673, Greenbelt, Maryland 20771 (United States)
  3. Austrian Academy of Sciences, Space Research Institute, Schmiedlstrasse 6, 8042 Graz (Austria)
Publication Date:
OSTI Identifier:
22218336
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 12; Other Information: (c) 2013 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; 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ALFVEN WAVES; ASTROPHYSICS; BETA RATIO; CRITICAL SIZE; ELECTRIC FIELDS; MAGNETIC FIELDS; MAGNETISM; MATHEMATICAL SOLUTIONS; NONLINEAR PROBLEMS; PLASMA; PLASMA DENSITY; PLASMA FILAMENT; PONDEROMOTIVE FORCE; PROTONS; SOLAR WIND; TURBULENCE; WHISTLERS