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- W3156857428 abstract "The absence of the expected GZK cutoff strongly challenges the notion that the highest-energy cosmic rays are of distant extragalactic origin. We discuss the possibility that these ultra-high-energy events originate in our Galaxy and propose that they may be due to iron nuclei accelerated from young, strongly magnetic neutron stars. Newly formed pulsars accelerate ions from their surface through relativistic MHD winds. We find that pulsars whose initial spin periods are shorter than ∼ 4(BS/10G) ms, where BS is the surface magnetic field, can accelerate iron ions to greater than 10eV . These ions can pass through the remnant of the supernova explosion that produced the pulsar without suffering significant spallation reactions. Depending on the structure of the galactic magnetic field, the trajectories of the iron ions from galactic sources can be consistent with the observed arrival directions of the highest energy events." @default.
- W3156857428 created "2021-04-26" @default.
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- W3156857428 date "1999-01-01" @default.
- W3156857428 modified "2023-09-27" @default.
- W3156857428 title "Galactic Ultra-High-Energy Cosmic Rays" @default.
- W3156857428 hasPublicationYear "1999" @default.
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