EPJ Web of Conferences
Volume 53, 2013UHECR 2012 - International Symposium on Future Directions in UHECR Physics
|Number of page(s)||7|
|Section||Cosmic Ray Sources and Propagation|
|Published online||25 June 2013|
Constraints on direct acceleration of UHECRs in astrophysical sources
1 Institute for Nuclear Research of the Russian Academy of Sciences, 60th October Anniversary Prospect 7a, Moscow 117312, Russia
2 Physics Department, M.V. Lomonosov Moscow State University, Moscow 119899, Russia
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A toy model of the population of numerous non-identical extragalactic sources of ultra-high-energy cosmic rays is presented. In the model, the acceleration of cosmic-ray particles is direct (not diffusive) and takes place in magnetospheres of supermassive black holes in galactic nuclei, the key parameter of acceleration being the black-hole mass. We use astrophysical data to describe the population of these cosmic-ray accelerators and confront the model with cosmic-ray and gamma-ray data.
© Owned by the authors, published by EDP Sciences, 2013
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