SIMBAD references

2008ApJ...675..156W - Astrophys. J., 675, 156-162 (2008/March-1)

The broadband spectrum of galaxy clusters.


Abstract (from CDS):

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.

Abstract Copyright:

Journal keyword(s): Acceleration of Particles - Galaxies: Clusters: Individual: Name: Coma - Plasmas - Radiation Mechanisms: Nonthermal - Relativity - X-Rays: Galaxies

Simbad objects: 9

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