The growth of magnetic fields prior to galaxy formation

Details The growth of magnetic fields prior to galaxy formation The growth of magnetic fields prior to galaxy formation

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...329l...1z&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 329, June 1, 1988, p. L1-L4.

Astronomy and Astrophysics

Astrophysics

18

Dynamo Theory, Galactic Evolution, Interstellar Magnetic Fields, Magnetohydrodynamics, Coriolis Effect, Density Distribution

Scientific paper

Hydromagnetic dynamo theory is applied to the problem of magnetic field amplification in the epoch after recombination but prior to galaxy formation. Large-scale density fluctuations acquire angular momentum from tidal torques exerted by neighboring fluctuations, and small-scale subfluctuations possess helicity due to the Coriolis forces associated with the rotation of the large-scale host fluctuations. Cosmic expansion and the interaction of matter with the ambient radiation field are taken into account. Despite many uncertainties, it is concluded that significant dynamo amplification may have occurred.

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