On Generation of magnetic field in astrophysical bodies

Abstract

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.

arXiv comment4 pages, Revtex, 1 figure

References in corpus (7)

• The inverse cascade and nonlinear alpha-effect in simulations of isotropic helical hydromagnetic turbulence
• Scaling properties of three-dimensional magnetohydrodynamic turbulence
• Mean magnetic field renormalization and Kolmogorov's energy spectrum in MHD turbulence
• Nonlinear Alpha Effect in Dynamo Theory
• Field theoretic calculation of renormalized-viscosity, renormalized-resistivity, and energy fluxes of magnetohydrodynamic turbulence
• Energy fluxes in helical magnetohydrodynamics and dynamo action
• Energy transfer in two-dimensional magnetohydrodynamic turbulence