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Date and Time of the Query: 2019-07-19 T02:31:43 PDT
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For refcode 2008ApJ...675..156W:
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2008ApJ...675..156W The Broadband Spectrum of Galaxy Clusters Wolfe, Brandon; Melia, Fulvio Abstract. We examine whether nonthermal protons energized during a cluster merger are simultaneously responsible for the Coma cluster's diffuse radio flux (via secondary decay) and the departure of its intracluster medium (ICM) from a thermal profile via Coulomb collisions between the quasi-thermal electrons and the hadrons. Rather than approximating the influence of nonthermal proton/thermal electron collisions as extremely rare events which cause an injection of nonthermal, power-law electrons (the knock-on approximation), we self-consistently solve (to our knowledge, for the first time) the covariant kinetic equations for the two populations. The electron population resulting from these collisions is out of equilibrium, yet not a power law, and importantly displays a higher bremsstrahlung radiative efficiency than a pure power law. Observations with GLAST will test this model directly. Key words: Acceleration of Particles, Galaxies: Clusters: Individual: Name: Coma, Plasmas, Radiation Mechanisms: Nonthermal, Relativity, X-Rays: Galaxies
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