Two-dimensional disk dynamos with vertical outflows into a halo

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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.
8 pages, 13 figures

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Astrophysics

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http://salesiana.dossiersoluciones.com/handle/123456789/2128

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/astro-ph/0012013
 http://arxiv.org/abs/astro-ph/0012013
 in: Dynamo and Dynamics, a Mathematical Challenge (eds. P. Chossat, D. Armbruster and I.Oprea), NATO Science Series II/26, Kluwer Academic Publishers, p. 305 (2001)

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arXiv