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Prog. Theor. Phys. Vol. 101 No. 1 (1999) pp. 39-45
Back Reaction to the Spectrum of Magnetic Field in the Kinetic Dynamo Theory
— Modified Kulsrud-Anderson Equation
—
Tetsuya Shiromizu1,*) and
Ryoichi Nishi2
1DAMTP, University of Cambridge
Silver Street, Cambridge CB3 9EW, UK,
Department of Physics, The University of Tokyo, Tokyo 113-0033,
Japan
and
Research Center for the Early Universe (RESCEU)
The University of Tokyo, Tokyo 113-0033, Japan
2Department of Physics, Kyoto University, Kyoto 606-8502, Japan
(Received July 29, 1998)
Abstract:
We take account of the lowest order back reaction on a
fluid and modify the Kulsrud-Anderson equation,
∂tEM= 2 γEM, obtained
in the kinetic dynamo theory, where EM is
the energy density of the magnetic field. We apply our
results to certain astrophysical stages where the magnetic field
is expected to be amplified by the dynamo mechanism.
URL :
http://ptp.ipap.jp/link?PTP/101/39/
DOI : 10.1143/PTP.101.39
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