Models for the Origin of the Knee in the Cosmic-Ray Spectrum

Details Models for the Origin of the Knee in the Cosmic-Ray Spectrum Models for the Origin of the Knee in the Cosmic-Ray Spectrum

2000-11-02

arxiv.org/abs/astro-ph/0011057v2

Astronomy and Astrophysics

Astrophysics

10 pages, 6 figures, submitted to Advances in Space Research

Scientific paper

10.1016/S0273-1177(01)00125-9

A sudden steepening of the cosmic-ray energy spectrum (the knee) is observed at an energy of about 3 PeV (1 PeV = $10^{15}$ eV). The experimental study of the PeV cosmic rays has intensified greatly during the last 3 years. The recent results on extensive air showers allow us to conclude that: a) the knee has an astrophysical origin; b) the `sharpness' and the fine structure of the knee rule out `Galactic Modulation' as the origin of the knee; c) most likely the knee is the result of the explosion of a single, recent, nearby supernova.

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