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Anisotropic weak turbulence of Alfvén waves in collisionless astrophysical plasmas

Luo, Qinghuan ; Melrose, Don

Monthly notices of the Royal Astronomical Society, 2006-05, Vol.368 (3), p.1151-1158 [Periódico revisado por pares]

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Título:
Anisotropic weak turbulence of Alfvén waves in collisionless astrophysical plasmas
Autor: Luo, Qinghuan ; Melrose, Don
Assuntos: Astronomy ; Astrophysics ; Earth, ocean, space ; Exact sciences and technology ; ISM: general ; Kinetics ; Magnetism ; Plasma ; plasmas ; pulsars: general ; turbulence
É parte de: Monthly notices of the Royal Astronomical Society, 2006-05, Vol.368 (3), p.1151-1158
Notas: istex:E4B8B81A655488A11F43C148BE8308D3B1428BF3
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Descrição: The evolution of the Alfvén turbulence due to three-wave interactions is discussed using kinetic theory for a collisionless, thermal plasma. There are three low-frequency modes, analogous to the three modes of compressible magnetohydrodynamics (MHD). When only Alfvén waves are considered, the known anisotropy of turbulence in incompressible MHD theory is reproduced. Inclusion of a fast mode wave leads to the separation of turbulence into two regimes: small wave numbers where three-wave processes involving a fast mode are dominant, and large wave numbers where the three Alfvén wave process is dominant. Possible application of the anisotropic Alfvén turbulence to the interstellar medium and dissipation of magnetic energy in magnetars are discussed.
Editor: Oxford, UK: Blackwell Publishing Ltd
Idioma: Inglês

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