Physics
Scientific paper
Apr 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aps..aprv16014c&link_type=abstract
American Physical Society, April Meeting, April 29-May 2, 2000 Long Beach, CA, abstract #V16.014
Physics
Scientific paper
The interpretation of recent rotation measure observations of galaxy clusters have revealed immense coherent regions, L_mag ~ 100 kpc, of large and near uniform magnetic fields. The magnetic energy of the largest, L_mag^3(B^2/8π) ~ 10^60 ergs, is 10^6 larger than that of a galaxy and 10^4 larger in flux. We associate these fields with single AGNs within the cluster and therefore with all galaxies during their AGN phase. Only the central, massive black hole (BH) has the necessary binding energy, ~ 10^61 ergs. Only the accretion disk during the BH formation has the winding number, ~ 10^11 turns, necessary to make the gain and magnetic flux. We present a model of the BH accretion disk dynamo that creates these magnetic fields, where the helicity of the α - Ω dynamo is driven by the coherent effect of star-disk collisions. The back reaction of the saturated dynamo forms a force-free field helix that carries all the energy and flux of the dynamo and redistributes the energy and flux within the clusters or within the walls of the IGM. A fraction of this energy forms the AGN luminosity. with Hui Li, R. Lovelace, V. Pariev, H. Beckley
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