Hierarchial galactic dynamo and seed magnetic field problem

Details Hierarchial galactic dynamo and seed magnetic field problem Hierarchial galactic dynamo and seed magnetic field problem

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994ap%26ss.216..219l&link_type=abstract

Astrophysics and Space Science, vol. 216, no. 1-2, p. 219-221

Astronomy and Astrophysics

Astrophysics

Astronomical Models, Dynamo Theory, Galactic Evolution, Interstellar Magnetic Fields, Molecular Clouds, Star Formation, Agglomeration, Fragmentation

Scientific paper

A new approach to the galactic seed magnetic field problem is briefly discussed. It is shown that, in early stages of galactic evolution, the hierarchial agglomeration and fragmentation processes can account for the generation of a dynamically important magnetic field. The amplification of this field follows an inverse cascade since a non-zero average value of the field amplified on a smaller scale serves as a seed field on the next (earlier) hierarchial scale. In such a scenario, a problem of how to get things started never occurs as any infinitesimally small battery generated seed field (Lazarian 1992a) can be efficiently amplified passing by through a sufficient number of amplification cascades.

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