The knee in the cosmic ray energy spectrum: a pulsar/supernova origin?
Abstract
The origin of the prominent 'knee' in the cosmic ray energy spectrum at an energy of several PeV is still uncertain. A recent mechanism has shown promise, however; this involves particles from a very young pulsar interacting with the radiation field from a very young supernova remnant. The ensuing nuclear reaction of the particles with the photons by way of e+e- production then causes the characteristic knee. In an earlier paper we argued that the mechanism would imply only one source of a very rare type - if it were to explain the spectral shape. Here we examine the mechanism in more detail and conclude that for even a single source to work its characteristics would need to be so unusual that the mechanism would not be possible for any known type of pulsar-supernova combination.
Keywords
Cite
@article{arxiv.1012.4562,
title = {The knee in the cosmic ray energy spectrum: a pulsar/supernova origin?},
author = {Tadeusz Wibig and Arnold W. Wolfendale},
journal= {arXiv preprint arXiv:1012.4562},
year = {2015}
}