TURBULENTLY GENERATED MAGNETIC-FIELDS IN CLUSTERS OF GALAXIES

The typical scale and velocity of the dominant, turbulent eddies excited by the motion of galaxies in clusters are determined from basic considerations which are valid if a steady state is attained. Hydrodynamic turbulence in the intracluster plasma presumably generates magnetic fields; our estimates of the typical scale and mean strength of these fields in cluster cores are about 10 kpc and at most a few 10(-7) G. We discuss implications of fields with these properties on the detectability of diffuse hard X-ray emission from clusters, and on transport properties in the intracluster space.