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Mean Field Dynamo Saturation: Toward Understanding Conflicting Results

Published online by Cambridge University Press:  30 March 2016

Eric G. Blackman  and
George B. Field
Eric G. Blackman
Affiliation:
Dept. of Physics & Astronomy, University of Rochester, NY 91125
George B. Field
Affiliation:
Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138

Abstract

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Mean field dynamos may explain the origin of large scale magnetic fields of galaxies, but controversy arises over the extent of dynamo quenching by the growing field. Here we explain how apparently conflicting results may be mutually consistent, by showing the role of magnetic helicity conservation and boundary terms usually neglected. We estimate the associated magnetic energy flowing out of the Galaxy but emphasize that the mechanism of field escape needs to be addressed.

Type
II. Joint Discussions
Information
Highlights of Astronomy , Volume 12: Highlights of Astronomy. As presented at the XXIVth General Assembly of the IAU, 2000 , 2002 , pp. 736 - 738
Copyright
Copyright © Astronomical Society of Pacific 2002

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