In adiabatically stratified cluster gas the MTI saturates via large plumes destroyed by shear, producing turbulent kinetic energy that scales as χ ω_T.
Evolution and structure of magnetic fields in simulated galaxy clusters
3 Pith papers cite this work. Polarity classification is still indexing.
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abstract
We use cosmological magneto-hydrodynamic simulations to study the evolution of magnetic fields in galaxy clusters in two different cosmological models, a standard-CDM and a $\Lambda$-CDM model. We show that the magnetic field strength profiles closely follow the cluster density profiles outside a core region of radius $\sim200\kpc$. The magnetic field has a correlation length of order $50\kpc$ and reverses on scales of $\sim100\kpc$ along typical lines-of-sight. The power spectrum of the magnetic field can well be approximated by a steep power law with an exponent of $\sim-2.7$. The mean magnetic field in the cluster cores grows roughly exponentially with decreasing redshift, $B\sim10^{-2.5z} \muG$. Merger events have a pronounced effect on magnetic field evolution, which is strongly reflected in measurable quantities like the Faraday rotation. The field evolution in the two different cosmologies proceeds virtually identically. All our cluster models very well reproduce observed Faraday rotation measurements when starting with nG seed fields.
fields
astro-ph.CO 3years
2026 3verdicts
UNVERDICTED 3representative citing papers
Proposes SKA observations of El Gordo to study high-redshift ICM magnetic fields via continuum and polarization measurements and test amplification models.
This review chapter summarizes the cosmic web's theoretical framework, recent radio observations of diffuse gas, and the expected impact of the SKA on detecting baryons in filaments and cluster outskirts.
citing papers explorer
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Magneto-Thermal Instability in Galaxy Clusters -- III. The Limit of Adiabatic Stratification
In adiabatically stratified cluster gas the MTI saturates via large plumes destroyed by shear, producing turbulent kinetic energy that scales as χ ω_T.
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Probing High-redshift Intracluster Medium Using SKA
Proposes SKA observations of El Gordo to study high-redshift ICM magnetic fields via continuum and polarization measurements and test amplification models.
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The Large-Scale Structure of the Universe through the SKA lenses
This review chapter summarizes the cosmic web's theoretical framework, recent radio observations of diffuse gas, and the expected impact of the SKA on detecting baryons in filaments and cluster outskirts.