Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989plap.work..197k&link_type=abstract
In ESA, Proceedings of an International School and Workshop on Plasma Astrophysics, Volume 1 p 197-201 (SEE N89-24910 18-75)
Astronomy and Astrophysics
Astrophysics
Astronomical Models, Galactic Evolution, Interstellar Magnetic Fields, Cosmology, Dynamo Theory, Interstellar Space
Scientific paper
Two theories of the origin of the galactic magnetic field are discussed. It is shown that the first theory, of its generation by a fast magnetic dynamo, is limited by the properties of the interstellar medium which suppress the small scale motions in the turbulence, and thus inhibit the generation of the field from a small seed field. The second theory that the galactic field is a relic of a general cosmic magnetic field existing prior to formation of our galaxy is discussed. It is pointed out that such a field would evolve to a field very similar to that which we see today.
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