Two-dimensional disk dynamos with vertical outflows into a halo
Astrophysics
2007-05-23 v1
Abstract
We study the effects of vertical outflows on mean-field dynamos in disks. These outflows could be due to thermal winds or magnetic buoyancy. We analyse numerical solutions of the nonlinear mean-field dynamo equations using a two-dimensional finite-difference model. Contrary to expectations, a modest vertical velocity can enhance dynamo action. This can lead to super-exponential growth of the magnetic field and to higher magnetic energies at saturation in the nonlinear regime.
Cite
@article{arxiv.astro-ph/0012013,
title = {Two-dimensional disk dynamos with vertical outflows into a halo},
author = {B. von Rekowski and W. Dobler and A. Shukurov and A. Brandenburg},
journal= {arXiv preprint arXiv:astro-ph/0012013},
year = {2007}
}
Comments
8 pages, 13 figures