Relativistic Particles in Clusters of Galaxies

Details Relativistic Particles in Clusters of Galaxies Relativistic Particles in Clusters of Galaxies

2002-06-18

arxiv.org/abs/astro-ph/0206310v1

Astronomy and Astrophysics

Astrophysics

To appear in Rencontre du Moriond, The Gamma-Ray Universe, 6 pages, 3 figures, uses moriond.sty (included)

Scientific paper

A brief overview on the theory and observations of relativistic particle populations in clusters of galaxies is given. The following topics are addressed: (i) the diffuse relativistic electron population within the intra-cluster medium (ICM) as seen in the cluster wide radio halos and possibly also seen in the high energy X-ray and extreme ultraviolet excess emissions of some clusters, (ii) the observed confined relativistic electrons within fresh and old radio plasma and their connection to cluster radio relics at cluster merger shock waves, (iii) the relativistic proton population within the ICM, and its observable consequences (if it exists), and (iv) the confined relativistic proton population (if it exists) within radio plasma. The importance of upcoming, sensitive gamma-ray telescopes for this research area is highlighted.

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