Do relativistic electrons either gain or lose energy, outside of extragalactic nuclei?

Details Do relativistic electrons either gain or lose energy, outside of extragalactic nuclei? Do relativistic electrons either gain or lose energy, outside of extragalactic nuclei?

Feb 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apjs...90..955r&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 90, no. 2, p. 955-958

Other

32

Electron Acceleration, Energy Dissipation, Extragalactic Radio Sources, Galactic Nuclei, Relativistic Particles, Accretion Disks, Compton Effect, Distribution Functions, Electron Distribution, Luminosity, Power Spectra, Stochastic Processes, Synchrotron Radiation

Scientific paper

In the generally accepted models of high-luminosity extragalactic radio sources, the relativistic electron distribution evolves significantly outside of its source in the galactic nucleus; synchrotron losses occur throughout the source, and the harder (flatter) spectra seen in the hot spots are one indicator of relativistic particle acceleration. Our reanalysis and interpretation of the Carilli et al. (1991) data on Cygnus A, on the other hand, showed no evidence for evolution of the electron distribution function, and no evidence of the universally assumed injection power-law distribution. Having found a spectrum that describes an entire source, we have also introduced the technique of correcting synchrotron maps for frequency-dependent effects. In this way, a partial devonvolution of the underlying physical parameters is possible. In Cygnus A, this correction procedure led to the dominance of a hitherto unrecognized structure, an edge-brightened channel girdled by rings. We briefly discuss some implications of this work and our plans to continue this line of investigation.

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