Spectrum and polarization of radio galaxy lobes and tails

Details Spectrum and polarization of radio galaxy lobes and tails Spectrum and polarization of radio galaxy lobes and tails

Apr 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986cajph..64..381a&link_type=abstract

(Conference on Jets from Stars and Galaxies, Toronto, Canada, June 24-27, 1985) Canadian Journal of Physics (ISSN 0008-4204), vo

Physics

2

Radio Galaxies, Radio Spectra, Angular Resolution, Astronomical Maps, Energy Spectra, Particle Acceleration, Polarization (Waves), Space Commercialization

Scientific paper

The distribution of radio spectra across six radio galaxies is studied at ≡4arcmin resolution. Spectral breaks consistent with the absence of particle acceleration are rare, and spectra do not always show the expected steepening with core distance or with frequency. Even in far outer tails there is evidence for recent reacceleration. Spectral flattening often occurs near bends, wiggles, and knots; thus, particle acceleration seems most efficient at "working surfaces" with the ambient media. Radio spectra indicate an energy spectrum of the accelerated particles flatter than ≡E-1.6 in these areas. Some polarization maps reveal inverted depolarization and departures from the λ2 law of Faraday rotation, probably due to different physical regimes within one antenna beam.

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