Open AccessStructure of nonlinear whistlers moving through plasma at an angle to the magnetic field
Author(s) -
Г. Н. Кичигин,
Г. Н. Кичигин
Publication year - 2018
Publication title -
solnečno-zemnaâ fizika
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.11
H-Index - 2
ISSN - 2412-4737
DOI - 10.12737/szf-41201803
Subject(s) - whistler , physics , magnetic field , mach number , plasma , computational physics , nonlinear system , amplitude , field (mathematics) , classical mechanics , mechanics , optics , mathematics , quantum mechanics , pure mathematics
The paper presents solutions of two-fluid magnetic hydrodynamics equations describing small-scale fast magnetosonic stable waves — nonlinear whist-lers moving in a cold magnetized plasma at an angle α to the external magnetic field. At the fixed angle α, the Alfvén Mach number of the whistlers has a narrow range of allowed values. It has been found that when passing from extremely small Mach numbers to ex-tremely large ones, amplitudes and spatial structure of wave velocity components and whistler magnetic field change significantly. The range of angles of the motion direction of whistlers with respect to direction of the the external magnetic field vector is determined. Within this range, the obtained approximate analytical and numerical solutions are in satisfactory agreement.