Fast dynamos, cosmic rays, and the Galactic magnetic field

Details Fast dynamos, cosmic rays, and the Galactic magnetic field Fast dynamos, cosmic rays, and the Galactic magnetic field

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...401..137p&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 401, no. 1, p. 137-145.

Astronomy and Astrophysics

Astrophysics

165

Cosmic Rays, Cosmology, Dynamo Theory, Interstellar Magnetic Fields, Dissipation, Galactic Halos, Magnetic Field Configurations, Magnetohydrodynamic Turbulence, Turbulent Mixing

Scientific paper

It is suggested here that the dynamo believed to be responsible for the magnetic field of the Galaxy is a fast dynamo due to the dynamical reconnection of the azimuthal field of the Galaxy as the field is deformed by the instability of the gaseous disk and the rapid inflation of magnetic lobes by the cosmic-ray gas to form the Galactic halo. The reconnection of adjacent lobes carries out both the alpha effect and field dissipation essential for the existence of the Galactic alpha-omega dynamo. The azimuthal field is generated primarily in the gaseous disk, while the alpha effect is carried out in the halo.

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