High energy cosmic rays from active galactic nuclei
High energy cosmic rays from active galactic nuclei is a scholarly work, published in 1992 in ''Physical Review Letters''. The main subjects of the publication include high-energy astronomy, Cosmic ray spallation, physics, dark matter, ultra-high-energy cosmic ray, COSMIC cancer database, active galactic nucleus, astronomy, gamma-ray burst, astrophysics, and cosmic radiation. The authors suggest that at an energy of ${10}^{16}$ eV, and possibly even up to ${10}^{19}$ eV, a substantial fraction of the observed cosmic rays may originate in the central regions of active galactic nuclei.