Stochastic Particle Acceleration in the Hot Spots of FRII Radio Galaxies

Details Stochastic Particle Acceleration in the Hot Spots of FRII Radio Galaxies Stochastic Particle Acceleration in the Hot Spots of FRII Radio Galaxies

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21111805l&link_type=abstract

American Astronomical Society, AAS Meeting #211, #118.05; Bulletin of the American Astronomical Society, Vol. 39, p.947

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Chandra, XMM-Newton, and HST observations of FRII radio galaxies, in combination with traditional radio studies, have advanced our understanding of the nature of jets, hot spots, and lobes significantly. The observed radio to optical emission has been attributed to the synchrotron processes. The X-ray emission can be produced through synchrotron, synchrotron self-Comptonization, and inverse Comptonization of the CMB or other background photos. Phenomenologically modelings of the observed broadband spectra have led to good constraints on the magnetic field and electron distribution. However, the matter and energy contents of the relativistic outflows driven by the central black holes, which power these sources, are still not well-constrained, and we also lack an understanding of the physical processes that determine the energy partition between the electrons and the magnetic field, the low energy cutoff of the electron spectrum, and the electron acceleration rate in these strongly magnetized relativistic plasmas. In the context of stochastic particle acceleration, we propose a model for the hot spots of radio galaxies and show how it may help us to address the above issues. This work was funded in part under the auspices of the US Department of Energy, and supported by its contract W-7405-ENG-36 to Los Alamos National Laboratory.

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