A four-component model of two Galactic and two extragalactic source populations reproduces the correlated spectral, composition, and anisotropy structures of cosmic rays from tens of GeV to 100 EeV.
Contribution to the local cosmic-ray flux from the Geminga supernova
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The contribution to the local cosmic-ray flux from the Geminga supernova is calculated assuming shock acceleration to 10^14 eV in a remnant which was formed several 10^5 years ago along with the Geminga pulsar. The particles are propagated to Earth using a simple diffusion model. In the region below the knee in the spectrum, it is found the supernova may contribute 10% of the local cosmic-ray flux, assuming plausible explosion parameters. The contribution to the amplitude of the anisotropy is not in conflict with the data in this energy region.
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Co-evolution of cosmic ray energy spectra, composition, and anisotropies
A four-component model of two Galactic and two extragalactic source populations reproduces the correlated spectral, composition, and anisotropy structures of cosmic rays from tens of GeV to 100 EeV.