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.
Observations of extended radio emission in clusters
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abstract
We review observations of extended regions of radio emission in clusters; these include diffuse emission in `relics', and the large central regions commonly referred to as `halos'. The spectral observations, as well as Faraday rotation measurements of background and cluster radio sources, provide the main evidence for large-scale intracluster magnetic fields and significant densities of relativistic electrons. Implications from these observations on acceleration mechanisms of these electrons are reviewed, including turbulent and shock acceleration, and also the origin of some of the electrons in collisions of relativistic protons by ambient protons in the (thermal) gas. Improved knowledge of non-thermal phenomena in clusters requires more extensive and detailed radio measurements; we briefly review prospects for future observations.
years
2026 2verdicts
UNVERDICTED 2representative citing papers
Perspective on using SKA-Low and SKA-Mid radio continuum to extend ram pressure stripping studies to southern clusters and z~0.5.
citing papers explorer
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The SKA View of the Sunyaev-Zeldovich Effect from Massive Cosmic Halos
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.
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Exploring the physics of ram pressure stripping with radio continuum observations in the SKA era
Perspective on using SKA-Low and SKA-Mid radio continuum to extend ram pressure stripping studies to southern clusters and z~0.5.