Diffuse Radio Emission from Galaxy Clusters

In a growing number of galaxy clusters diffuse extended radio sources have been found. These sources are not directly associated with individual cluster galaxies. The radio emission reveal the presence of cosmic rays and magnetic fields in the intracluster medium (ICM). We classify diffuse cluster radio sources into radio halos, cluster radio shocks (relics), and revived AGN fossil plasma sources. Radio halo sources can be further divided into giant halos, mini-halos, and possible "intermediate" sources. Halos are generally positioned at cluster center and their brightness approximately follows the distribution of the thermal ICM. Cluster radio shocks (relics) are polarized sources mostly found in the…

• NA
  National Aeronautics and Space Administration
• NR
  National Research Foundation

  Award: 2016R1A5A1013277
• NO
  Nederlandse Organisatie voor Wetenschappelijk Onderzoek

  Awards: 639.042.729, 639.041.542
• GS
  Goddard Space Flight Center