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キーワード:
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要旨:
We explore constraints imposed by shear-driven instabilities on the
acceleration of energetic particles in relativistic shearing flows. We
show that shearing layers in large-scale AGN jets are likely to
encompass a sizeable fraction (greater than or similar to 0.1) of the
jet radius, requiring seed injection of GeV electrons for efficient
acceleration. While the diffusion process may depend on predeveloped
turbulence if injection occurs at higher energies, electron acceleration
to PeV and proton acceleration to EeV energies appears possible within
the constraints imposed by jet stability.
