Publication details for Prof Sir Arnold WolfendaleErlykin, AD, Wibig, T & Wolfendale, AW (2001). A universal origin for cosmic rays above 10(7) GeV? New Journal Of Physics 3: 181-1814.
- Publication type: Journal Article
- ISSN/ISBN: 1367-2630
- Keywords: GALAXIES; BURSTS
Author(s) from Durham
An analysis is made of the origin of cosmic rays above about 10(7) GeV.
Two models are considered, involving 'super supernovae' and pulsars. In
both cases the fluctuations in spectral intensity and shape, for the
important iron component, are very great from one pattern of sources to
another; the situation is expected to be the same for the other mass
components too. There is also 'structure' in the predicted spectra,
particularly for pulsars. The experimentally observed spectrum is
easily considered as a downward fluctuation on the mean. Adoption of
the mean output per galaxy, together with an estimate (in depth) of the
volume density of (equivalent-to-ours) galaxies in the Universe leads
to an expected extragalactic spectrum not far from observation.
The meaning of the above is that it may be possible to explain all
cosmic rays, above 10(7) GeV in terms of Galactic and extragalactic
sources involving the same mechanism.