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Cosmic-ray antimatter - A primary origin hypothesisThe present investigation is concerned with the possibility that the observed cosmic-ray protons are of primary extragalactic origin, taking into account the significance of the current antiproton data. Attention is given to questions regarding primary antiprotons, antihelium fluxes, and the propagation of extragalactic cosmic rays. It is concluded that the primary origin hypothesis should be considered as a serious alternative explanation for the cosmic-ray antiproton fluxes. Such extragalactic primary origin can be considered in the context of a baryon symmetric domain cosmology. The fluxes and propagation characteristics suggested are found to be in rough agreement with the present antiproton data.
Document ID
Document Type
Reprint (Version printed in journal)
External Source(s)
Stecker, F. W. (NASA Goddard Space Flight Center Laboratory for High energy Astrophysics, Greenbelt, MD, United States)
Protheroe, R. J. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Kazanas, D. (NASA Goddard Space Flight Center Laboratory for High Energy Astrophysics, Greenbelt; Maryland, University, College Park, MD , United States)
Date Acquired
August 12, 2013
Publication Date
October 1, 1983
Publication Information
Publication: Astrophysics and Space Science
Volume: 96
Issue: 1, Oc
ISSN: 0004-640X
Subject Category
Distribution Limits