Ultra high energy cosmic rays

Details Ultra high energy cosmic rays Ultra high energy cosmic rays

Sep 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007jphg...34.1891w&link_type=abstract

Journal of Physics G: Nuclear and Particle Physics, Volume 34, Issue 9, pp. 1891-1900 (2007).

Physics

Scientific paper

Despite detailed examination and discussion there is still argument about the cosmic ray (CR) particle energy which marks the dividing line between particles primarily of galactic energy and those of extragalactic origin. Our own view (e.g. Wibig and Wolfendale 2005 J. Phys. G: Nucl. Part. Phys. 31 255) and stated by some others, previously, is that the 'ankle', which is in the range 1018 1019 eV, marks the transition. Others, however, do not agree. The position of the ankle would appear to be a natural dividing line but there have been continuing claims (e.g. Berezinsky et al 2004 Astropart. Phys. 21 617), that the ankle can be explained by EG particles alone. Here we examine this possibility in depth and conclude that it cannot. Thus, we still argue that the CR particles are mainly galactic below the ankle and extragalactic above.

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