UHECRs from the Radio Lobes of AGNs

Details UHECRs from the Radio Lobes of AGNs UHECRs from the Radio Lobes of AGNs

2008-09-23

arxiv.org/abs/0809.3940v2

Astronomy and Astrophysics

Astrophysics

4 pages, 2 figures; talk given by F.F. at Conference "Challenges in Particle Astrophysics" (XXth Rencontres de Blois 2008)

Scientific paper

We report a stochastic mechanism of particle acceleration from first principles in an environment having properties like those of Radio Lobes in AGNs. We show that energies $\sim 10^{20}$ eV are reached in $\sim 10^6$ years for protons. Our results reopen the question regarding the nature of the high-energy cutoff in the observed spectrum: whether it is due solely to propagation effects, or whether it is also affected by the maximum energy permitted by the acceleration process itself.

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