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

  • R. Meinel (a1), D. Elstner (a1), G. Rüdiger (a1) and F. Krause (a1)

Extract

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).

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Copyright

References

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Beck, R. (1989) ‘Present status of radio polarization observations’, Geophys. Astrophys. Fluid Dyn. (in press).
Elstner, D., Meinel, R., and Rüdiger, G. (1989) ‘Galactic dynamo models without sharp boundaries’, Geophys. Astrophys. Fluid Dyn. (in press).
Krause, F., and Meinel, R. (1988) ‘Stability of simple nonlinear α2 -dynamos’, Geophys. Astrophys. Fluid Dyn. 43, 95117.
Krause, F. (1989) ‘How well is dynamo theory of flat objects developed?’, Geophys. Astrophys. Fluid Dyn. (in press).
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.
Meinel, R. (1989) ‘Generation of localized magnetic fields by dynamos with conducting surroundings’, Astron. Nachr. 310, 16.
Ruzmaikin, A.A., Shukurov, A.M., and Sokoloff, D.D. (1988) Magnetic-Fields of Galaxies, Kluwer Academic Publishers,1 Dordrecht.

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