Hostname: page-component-cd9895bd7-dzt6s Total loading time: 0 Render date: 2024-12-25T06:43:25.468Z Has data issue: false hasContentIssue false
  • English
  • Français

Magnetisation of partially ionised dusty disks

Published online by Cambridge University Press:  14 February 2002

GUIDO T. BIRK ,
A. KOPP  and
H. LESCH
GUIDO T. BIRK
Affiliation:
Institut für Astronomie und Astrophysik, Universität München, D-81679 München, Germany Centre of Interdisciplinary Plasma Science, Garching, Germany
A. KOPP
Affiliation:
Max-Planck Institut für Aeronomie, Max-Planck-Straße 2 D-37191 Katlenburg-Lindau, Germany
H. LESCH
Affiliation:
Institut für Astronomie und Astrophysik, Universität München, D-81679 München, Germany Centre of Interdisciplinary Plasma Science, Garching, Germany
Get access Rights & Permissions [Opens in a new window]

Abstract

The self-magnetisation of circumstellar disks is considered within an appropriate multifluid description. These disks are composed of ionised and neutral gas as well as of a charged dust component. The most important equation in this context is the general Ohm’s law that includes a magnetic field generation term due to relative dust–neutral fluid velocities. We show that circumstellar disks can carry their own significant magnetic fields. As long as the stellar gravitation sustains the accretion flow, the self-magnetisation of the disk does not saturate until the field strength reaches its local equipartition value. The magnetic field generation process is illustrated by idealised multifluid simulations that are not restricted to a kinematic description, but model the process in a self-consistent way.

Type
Research Article
Information
Journal of Plasma Physics , Volume 66 , Issue 3 , September 2001 , pp. 213 - 222
Copyright
2001 Cambridge University Press

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)