Beyond the myth of the supernova-remnant origin of cosmic rays.

Butt, Yousaf · Nature · 2009

review · Level V

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Abstract

The origin of Galactic cosmic-ray ions has remained an enigma for almost a century. Although it has generally been thought that they are accelerated in the shock waves associated with powerful supernova explosions-for which there have been recent claims of evidence-the mystery is far from resolved. In fact, we may be on the wrong track altogether in looking for isolated regions of cosmic-ray acceleration.