Speaker
Sergey Troitsky
(Russian Academy of Sciences (RU))
Description
I discuss possible sites of acceleration of UHECRs by regular electromagnetic fields in astrophysical sources. A plausible mechanism of acceleration works in the vicinity of supermassive black holes in active galactic nuclei. It is motivated by relatively high density of UHECR sources as suggested by both statistics of clustering and the shape of the GZK cutoff. However, I demonstrate that the model is strongly constrained by FERMI-LAT observations of the secondary gamma-ray background. I also briefly discuss potential Galactic sources where this mechanism might be at work.
Primary author
Sergey Troitsky
(Russian Academy of Sciences (RU))
Co-authors
Ms
Ksenia Ptitsyna
(Moscow State University)
Dr
Oleg Kalashev
(INR RAS)
