Open AccessBack Reaction to the Spectrum of Magnetic Field in the Kinetic Dynamo Theory
Author(s) -
Tetsuya Shiromizu,
Ryoichi Nishi
Publication year - 1999
Publication title -
progress of theoretical physics
Language(s) - English
Resource type - Journals
eISSN - 1347-4081
pISSN - 0033-068X
DOI - 10.1143/ptp.101.39
Subject(s) - dynamo , physics , dynamo theory , magnetic field , kinetic energy , magnetic energy , spectrum (functional analysis) , solar dynamo , quantum electrodynamics , energy spectrum , field (mathematics) , condensed matter physics , classical mechanics , astrophysics , quantum mechanics , magnetization , mathematics , pure mathematics
We take account of the lowest order back reaction on the fluid and modify theKulsrud and Anderson equation $\partial_t{\cal E}_M= 2 \gamma {\cal E}_M$obtained in the kinetic dynamo theory, where ${\cal E}_M$ is the energy densityof the magnetic field. Furthermore, we apply our present result to someastrophysical stages where the magnetic field is expected to be amplified bythe dynamo mechanism.Comment: 9 pages, LaTex, to appear in Prog. Theor. Phy
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