Ultrahigh Energy Cosmic Rays: A Galactic Origin?

Abstract

It is suggested that essentially all of the UHECRs we detect, including those at the highest energy, originate in our Galaxy. It is shown that even if the density of sources decreases with Galactic radius, then the anisotropy and composition can be understood. Inward anisotropy, as recently reported by the Auger collaboration can be understood as drift along the current sheet of UHECRs originating outside the solar circle, as predicted in Kumar and Eichler (2014), while those originating within the solar circle exit the Galaxy at high latitudes.

arXiv commentaccepted for publication in The Astrophysical Journal

References in corpus (12)

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Cited by in corpus (6)

• Observation of a Large-scale Anisotropy in the Arrival Directions of Cosmic Rays above $8\times 10^{18}$ eV
• Cosmic Ray Models
• Ultra High Energy Cosmic Ray Source Models: Successes, Challenges and General Predictions
• Selected Topics in Cosmic Ray Physics
• Time variability of TeV cosmic ray sky map
• Particle Spectra and Mass Composition in the Ultra-High Energy Region in the Framework of the Galactic Origin of Cosmic Rays