Extragalactic cosmic rays
High Energy Astrophysical Phenomena
2022-01-13 v1
Abstract
I review the status of ultrahigh-energy cosmic ray (UHECR) physics.After introducing the main experimental results and summarizing possible intepretations, I discuss observational and theoretical constraints on the sources of UHECRs. I comment also briefly on the role of magnetic fields. Combining these constraints, I argue that luminuous and numerous AGN types as FR-I and Seyfert galaxies, or alternatively hypernovae, are the most promising UHECR sources. Finally, I sketch few of the models presented at the conference before concluding.
Cite
@article{arxiv.2201.04535,
title = {Extragalactic cosmic rays},
author = {M. Kachelriess},
journal= {arXiv preprint arXiv:2201.04535},
year = {2022}
}
Comments
1+15+4 pages; invited talk at the ICRC 2021