Waves, Coriolis force and the dynamo effect

Details Waves, Coriolis force and the dynamo effect Waves, Coriolis force and the dynamo effect

2004-10-11

arxiv.org/abs/astro-ph/0410276v1

Astrophys.J. 619 (2005) 1014-1018

Astronomy and Astrophysics

Astrophysics

8 pages, 3 figures, ApJ (in press)

Scientific paper

10.1086/426533

Dynamo activity caused by waves in a rotating magneto-plasma is investigated. In astrophysical environments such as accretion disks and at sufficiently small spatial scales, the Hall effect is likely to play an important role. It is shown that a combination of the Coriolis force and Hall effect can produce a finite $\alpha$-effect by generating net helicity in the small scales. The shear/ion-cyclotron normal mode of the Hall plasma is the dominant contributor to the dynamo action for short scale motions.

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