UHECR acceleration in seyfert galactic nuclei

Details UHECR acceleration in seyfert galactic nuclei UHECR acceleration in seyfert galactic nuclei

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icrc....6.2100u&link_type=abstract

Proceedings of the 27th International Cosmic Ray Conference. 07-15 August, 2001. Hamburg, Germany. Under the auspices of the Int

Physics

Scientific paper

The model of particle acceleration up to energies E≈1021 eV in Seyfert nuclei is suggested. Particles are accelerated in hot spots of relativistic jets, which damp in dense stellar kernel at distances 1-3 pc from the centre. The energy and chemical composition of accelerated particles depend on the value of magnetic field B in jets. If B~(51000) G nuclei with charges Z>1 attain energy E>1020 eV, namely: He nuclei (Z=2) get the maximum energy E≈1.5 1020 eV in a magnetic field of B≈40 G; Fe nuclei (Z=26) are accelerated up to E≈9 1020 eV in a field of B≈16 G. In fields of B~1000 G only heavy particles with Z≥23 can be accelerated to E≥1020 eV. Curvature and synchrotron radiation of accelerated particles is shown to be small. UHECR energy losses in infrared photon fields are negliglible if galactic luminosity is L<1046 erg/s. ------------------------------------------------------------------------

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