Particle acceleration in rotating and shearing AGN jets

Details Particle acceleration in rotating and shearing AGN jets Particle acceleration in rotating and shearing AGN jets

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icrc....7.2701r&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

Steady state solutions of the kinetic equations describing the transport of energetic particles in a collisionless, rotating background flow are discussed for conditions assumed to prevail in the jets of active galactic nuclei. By considering velocity profiles from rigid to keplerian rotation, the centrifugal acceleration and the shear acceleration of particles scattered by magnetic inhomogenities are distinguished. In the case where shear effects dominate, it is confirmed that power-law particle momentum solutions exist if the mean scattering time is an increasing function of momentum. If there is a more complex interplay between shear and centrifugal acceleration, a flattening of the momentum spectra with increasing azimuthal velocity is observed. The relevance of shear acceleration in addition to Fermi-type particle acceleration in AGN jets is pointed out with reference to recent observations in 3C273.

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