Abstract
Within the more than 30 yr of cosmic ray astrophysics, neither their origin nor their precise mode of propagation have found undisputable explanations. Among the favoured boosters have been point sources, like supernovae and pulsars, as well as extended sources, like cosmic clouds and supernova remnants. Extended sources have been proposed by Fermi (1949), and pushed more recently by a number of investigators because of the huge available reservoirs, and because repetitive shock acceleration can generate power law spectra which are similar to the ones observed (Axfordet al., 1977; Bell, 1978; Blandford and Ostriker, 1978; Krymsky, 1977). Yet the shock acceleration model cannot easily be adjusted to achieve particle energies in excess of some critical energy, of order 104±1 GeV (Völket al., 1981). For this and several other reasons, the suggestion is revived that neutron stars are the dominant source of high-energy cosmic rays. To be more precise: the (relativistic) ionic component of the cosmic rays is argued to be injected by young binary neutron stars (≲105 yr) whose rotating magnetospheres act like grindstones in the wind of their companion (Kundt, 1976). The high-energy (≳30 GeV) electron-positron component may be generated by young pulsars (≲105 yr) and by collision processes, and the electron component below 30 GeV predominantly by supernova remnants.
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Kundt, W. Cosmic rays from binary neutron stars. Astrophys Space Sci 90, 59–66 (1983). https://doi.org/10.1007/BF00651547
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DOI: https://doi.org/10.1007/BF00651547