On Generation of magnetic field in astrophysical bodies

Details On Generation of magnetic field in astrophysical bodies On Generation of magnetic field in astrophysical bodies

2001-12-09

arxiv.org/abs/nlin/0112013v1

Curr.Sci. 85 (2002) 620

Nonlinear Sciences

Chaotic Dynamics

4 pages, Revtex, 1 figure

Scientific paper

In this letter we compute energy transfer rates from velocity field to magnetic field in MHD turbulence using field-theoretic method. The striking result of our field theoretic calculation is that there is a large energy transfer rate from the large-scale velocity field to the large-scale magnetic field. We claim that the growth of large-scale magnetic energy is primarily due to this transfer. We reached the above conclusion without any linear approximation like that in $\alpha$-dynamo.

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