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Author

F. Rieger

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2 papers indexed here

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Preprint Oct 2026

A microscopic analysis of shear acceleration in the relativistic regime

Relativistic shear flows, as encountered in jets of powerful astrophysical sources, offer promising sites of particle acceleration up to the highest energies. This stochastic acceleration process is usually described with Fokker-Planck transport equations, which assume small momentum gains per scattering. The present p...

S. Aerdker, Xing-Wei Gong, M. Lemoine et al. · 0 citations
Open access Oct 2026

Exploring cosmic rays from gravity-limited acceleration at supermassive black holes

We show that horizon-scale magnetic fields around supermassive black holes (SMBHs), only limited by gravity, yield a universal, model-independent ceiling on electromagnetic energy density. For rotating SMBHs, this field enables particle acceleration up to $\sim\!10^{27}$\,eV set solely by fundamental constants. We iden...

E. Manao, E. Resconi, F. Rieger et al. · 0 citations

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