Abstract
Evidence on the energy spectrum, mass composition and anisotropy of cosmic rays above 10 14 eV is briefly surveyed and it is shown that the data are consistent with all cosmic rays below 10 19 eV being of galactic origin. Results from the new field of γ-ray astronomy above 10 15 eV are described and implications for the origin of cosmic rays are discussed. It is argued that while shock acceleration can explain the cosmic ray beam below ∼2×10 15 eV, the spectrum up to 10 19 eV at the present time may be dominated by the output from a single accelerator (Cyg X-3 being the paradigm). Cosmic rays above 10 19 eV are probably of extra-galactic origin.
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.
