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Galactic Dynamos Without Sharp Boundaries: Non-Axisymmetric Fields in Axisymmetric Disks?

Published online by Cambridge University Press:  19 July 2016

R. Meinel ,
D. Elstner ,
G. Rüdiger  and
F. Krause
R. Meinel
Affiliation:
Sternwarte Babelsberg Academy of Science Potsdam 1591 GDR
D. Elstner
Affiliation:
Sternwarte Babelsberg Academy of Science Potsdam 1591 GDR
G. Rüdiger
Affiliation:
Sternwarte Babelsberg Academy of Science Potsdam 1591 GDR
F. Krause
Affiliation:
Sternwarte Babelsberg Academy of Science Potsdam 1591 GDR

Extract

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Radio polarization observations of spiral galaxies suggest the existence of large-scale galactic magnetic fields which are of either axisymmetric -spiral (ASS) or bisymmetric-spiral (BSS), i.e. non-axisymmetric, structure (cf. Beck, 1939). Clear evidence for a BSS field was indicated for M31 by M. Krause et al. (1989).

Type
4. Magnetohydrodynamics of Galactic Magnetic Fields
Information
Symposium - International Astronomical Union , Volume 140: Galactic and Intergalactic Magnetic Fields , 1990 , pp. 115 - 116
Copyright
Copyright © Kluwer 1990 

References

Beck, R. (1989) ‘Present status of radio polarization observations’, Geophys. Astrophys. Fluid Dyn. (in press).Google Scholar
Elstner, D., Meinel, R., and Rüdiger, G. (1989) ‘Galactic dynamo models without sharp boundaries’, Geophys. Astrophys. Fluid Dyn. (in press).Google Scholar
Krause, F., and Meinel, R. (1988) ‘Stability of simple nonlinear α2 -dynamos’, Geophys. Astrophys. Fluid Dyn. 43, 95–117.Google Scholar
Krause, F. (1989) ‘How well is dynamo theory of flat objects developed?’, Geophys. Astrophys. Fluid Dyn. (in press).Google Scholar
Krause, M., Beck, R., and Hummel, E. (1989) ‘The magnetic field structure in two nearby spiral galaxies II. The bisymmetric spiral magnetic field in M81’, Astron. Astrophys. 217, 17.Google Scholar
Meinel, R. (1989) ‘Generation of localized magnetic fields by dynamos with conducting surroundings’, Astron. Nachr. 310, 1–6.CrossRefGoogle Scholar
Ruzmaikin, A.A., Shukurov, A.M., and Sokoloff, D.D. (1988) Magnetic-Fields of Galaxies, Kluwer Academic Publishers,1 Dordrecht.CrossRefGoogle Scholar