LXXX. On the possible relation of galactic radio noise to cosmic rays

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Abstract
The possibility is considered that cosmic rays are accelerated in regions of the galaxy of intermediate particle density (≈109cm-3). It is found that a conservative estimate of the magnetic fields in such regions would lead to a radio noise flux of the observed order of magnitude, and that the observed spectrum could easily be produced. A possible cause is suggested for the low energy cut-off in the cosmic-ray spectrum. If the proposed mechanism accounts for any large proportion of the cosmic rays, these should be accompanied by a small flux of γ quanta which should show the same anisotropy as the galactic radio noise.