On Generation of magnetic field in astrophysical bodies

Mahendra K. Verma

Submitted on 9 December 2001


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 α-dynamo.


Comment: 4 pages, Revtex, 1 figure

Subjects: Nonlinear Sciences - Chaotic Dynamics; Astrophysics; Condensed Matter