Abstract
This paper argues in a first part that the observation of anisotropies at energies close to the GZK cut-off strongly argues in favor of the existence of protons at these energies. It then discusses the possible source of such protons, providing first general bounds on the luminosity of the source and on the amount of energy to be released in the ultra-high energy range. The necessary conditions point towards relativistic shock acceleration as an acceleration agent. Then, it discusses the physics of relativistic shock acceleration from a more microphysical point of view.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
