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Magnetic Fields in the Spiral Galaxy NGC 6946

Published online by Cambridge University Press:  19 July 2016

Matthias Ehle  and
Rainer Beck
Matthias Ehle
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, W-5300 Bonn 1, FRG
Rainer Beck
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, W-5300 Bonn 1, FRG

Abstract

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High frequency polarization observations reveal the existence of a large-scale ordered magnetic field in the disk of the spiral galaxy NGC 6946. At lower frequencies the disk is no longer transparent to polarized radio waves due to Faraday depolarization. The spiral pattern of the uniform magnetic field and the distribution of polarized intensities are fairly well simulated by a dynamo model. The model parameters indicate that the dynamo does not only operate in the disk, but also in the halo.

Type
7. Magnetic Fields in Galaxies: Observations
Information
Symposium - International Astronomical Union , Volume 157: The Cosmic Dynamo , 1993 , pp. 311 - 312
Copyright
Copyright © Kluwer 1993 

References

Beck, R.: 1991, A&A 251, 15 Google Scholar
Ehle, M.: 1991, Diploma Thesis , Univ. of Bonn Google Scholar
Ehle, M. and Beck, R.: 1993 A&A (in press) Google Scholar
Elstner, D., Meinel, R., Beck, R.: 1992, A&AS 94, 587 Google Scholar