Self-regulating AGN jets in MHD simulations of cool-core clusters yield realistic FRI radio morphologies viewed along the jet axis and account for frequency-independent lobe extents via 1-50 μG fields allowing both young and old electrons to radiate.
Cosmic rays in galaxy clusters and their non-thermal emission
7 Pith papers cite this work. Polarity classification is still indexing.
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Pith papers citing it
abstract
Radio observations prove the existence of relativistic particles and magnetic field associated with the intra-cluster-medium (ICM) through the presence of extended synchrotron emission in the form of radio halos and peripheral relics. This observational evidence has fundamental implications on the physics of the ICM. Non-thermal components in galaxy clusters are indeed unique probes of very energetic processes operating within clusters that drain gravitational and electromagnetic energy into cosmic rays and magnetic fields. These components strongly affect the (micro-)physical properties of the ICM, including viscosity and electrical conductivities, and have also potential consequences on the evolution of clusters themselves. The nature and properties of cosmic rays in galaxy clusters, including the origin of the observed radio emission on cluster-scales, have triggered an active theoretical debate in the last decade. Only recently we can start addressing some of the most important questions in this field, thanks to recent observational advances, both in the radio and at high energies. The properties of cosmic rays and of cluster non-thermal emissions depend on the dynamical state of the ICM, the efficiency of particle acceleration mechanisms in the ICM and on the dynamics of these cosmic rays. In this review we discuss in some detail the acceleration and transport of cosmic rays in galaxy clusters and the most relevant observational milestones that have provided important steps on our understanding of this physics. Finally, looking forward to the possibilities from new generations of observational tools, we focus on what appear to be the most important prospects for the near future from radio and high-energy observations.
years
2026 7verdicts
UNVERDICTED 7representative citing papers
MHD simulations indicate that SKA-Mid Band 5a can detect filamentary polarized emission from ICM magnetic fields at high resolution and sensitivity, allowing inference of turbulence driving scales.
MINOT modeling of Abell 3667 predicts hadronic gamma-ray flux roughly matching Fermi-LAT observations in the 1-300 GeV band but with a spectral index in tension with the data.
The SKA will enable high-resolution, high-sensitivity observations of the thermal SZ effect in massive halos, capturing both pressure substructures and large-scale ICM emission.
Perspective on using SKA-Low and SKA-Mid radio continuum to extend ram pressure stripping studies to southern clusters and z~0.5.
Review summarizing cluster merger shocks, radio relics from SKA pathfinders, and future SKA science cases for studying these phenomena.
Review chapter summarizing the importance of small-scale galactic magnetic fields and proposing SKA observation strategies.
citing papers explorer
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A MINOT-based Study of Gamma-ray emission from SPT-CL J2012-5649/Abell 3667
MINOT modeling of Abell 3667 predicts hadronic gamma-ray flux roughly matching Fermi-LAT observations in the 1-300 GeV band but with a spectral index in tension with the data.
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Probing Merger Shocks in Galaxy Clusters in the SKA Era
Review summarizing cluster merger shocks, radio relics from SKA pathfinders, and future SKA science cases for studying these phenomena.