Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21714904f&link_type=abstract
American Astronomical Society, AAS Meeting #217, #149.04; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
For conduction to be an efficient method for heating the cores of galaxy clusters, magnetic fields must be randomized within the central region of the intracluster medium (ICM). The heat-flux-driven buoyancy instability (HBI) tends to align magnetic fields azimuthally and shut off conduction; however, turbulence from mergers and galactic wakes may be enough to restore random orientations. One method for quantifying such randomness is through Faraday rotation measure mapping, which may be achieved using high resolution polarization measurements of the cosmic microwave background (CMB). In anticipation of such measurements, we present a statistical analysis of power spectra from numerically modeled rotation measure maps. We initialize a spherically symmetric galaxy cluster in hydrostatic equilibrium based on observed parameters of Abell 1060, and we generate rotation measure maps from randomly oriented, flux-frozen, divergence-free magnetic fields.
Foreman Gary
Ricker Paul
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