Ambipolar diffusion drifts and dynamos in turbulent gases

Details Ambipolar diffusion drifts and dynamos in turbulent gases Ambipolar diffusion drifts and dynamos in turbulent gases

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...329..384z&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 329, June 1, 1988, p. 384-391.

Astronomy and Astrophysics

Astrophysics

26

Ambipolar Diffusion, Dynamo Theory, Interstellar Magnetic Fields, Magnetohydrodynamic Turbulence, Turbulent Diffusion, Turbulent Flow, Interstellar Matter, Magnetic Flux, Molecular Clouds

Scientific paper

The author considers ambipolar drift in turbulent fluids. Using mean-field electrodynamics, a two-scale theory originally used to study hydromagnetic dynamos, it is shown that magnetic fields can be advected by small-scale magnetosonic (compressional) turbulence or generated by Alfvénic (helical) turbulence. The author makes a simple dynamo theory and compares it with standard theories in which dissipation is caused by turbulent diffusion. The redistribution of magnetic flux in interstellar clouds is also discussed.

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