publication . Other literature type . Preprint . Article . 2008

Observations of Extended Radio Emission in Clusters

Federica Govoni;
Open Access
  • Published: 01 Jan 2008
  • Publisher: Springer Science and Business Media LLC
  • Country: France
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 (therm...
Subjects
arXiv: Astrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics::High Energy Astrophysical Phenomena
free text keywords: Astrophysics, Space and Planetary Science, Astronomy and Astrophysics

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