Models for the magnetic field of M81

Details Models for the magnetic field of M81 Models for the magnetic field of M81

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...409..179m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 409, no. 1, p. 179-189.

Astronomy and Astrophysics

Astrophysics

18

Astronomical Models, Dynamo Theory, Interstellar Magnetic Fields, Magnetic Field Configurations, Spiral Galaxies, Cosmology, Faraday Effect, Galactic Evolution, Interacting Galaxies

Scientific paper

The present study of the nonaxisymmetric magnetic field present in M81 uses several mean-field dynamo models in disk geometry, and is mindful of the possibilities that M81 may have undergone a close encounter with a companion galaxy, and that the spiral structure may give a nonaxisymmetric structure to the disk turbulence, and therefore to the turbulent coefficients that appear in mean field dynamo theory. The models predict that nonaxisymmetric fields will be present in the outer parts of the galaxy, in conjunction with significant axisymmetric contributions in the inner part.

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