Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983icrc....2..230c&link_type=abstract
Presented at the 18th Intern. Cosmic Ray Conf., Bangalore, India, 22 Aug. - 3 Sep. 1983
Astronomy and Astrophysics
Astrophysics
Active Galactic Nuclei, Cosmic Rays, Damping, Galactic Radiation, Particle Acceleration, Photons, Astrophysics, Energy Dissipation, Pair Production, Seyfert Galaxies
Scientific paper
The usual assumption of the acceleration of ultra high energy cosmic rays, greater than or equal to 10(18) eV in quasars, Seyfert galaxies and other active galactic nuclei is challenged on the basis of the photon interactions with the accelerated nucleons. This is similar to the effect of the black body radiation on particles 10(20) eV for times of the age of the universe except that the photon spectrum is harder and the energy density greater by approx. = 10(15). Hence, a single traversal, radial or circumferential, of radiation whose energy density is no greater than the emitted flux will damp an ultra high energy. Hence, it is unlikely that any reasonable configuration of acceleration can void disastrous photon energy loss. A different site for ultra high energy cosmic ray acceleration must be found.
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