Acceleration of Cosmic-Ray Particles among Extragalactic Nebulae

Details Acceleration of Cosmic-Ray Particles among Extragalactic Nebulae Acceleration of Cosmic-Ray Particles among Extragalactic Nebulae

Jul 1957

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1957phrv..107..269b&link_type=abstract

Physical Review, vol. 107, Issue 1, pp. 269-271

Physics

6

Scientific paper

It is proposed that cosmic-ray particles can be accelerated by the Fermi mechanism acting among galaxies in clusters in the same way that Fermi originally proposed for interstellar clouds in our own galaxy. When applied to the local group of galaxies this mechanism does not lead to an appreciable increase in energy over the limit attainable in our own galaxy. However, the conditions in a highly concentrated cluster such as the Coma cluster lead to maximum energies in the range 1018-1020 ev. Some implications of these results are discussed.

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