Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989pabc.work....8d&link_type=abstract
Presented at the Particle Astrophysics Workshop, Berkeley, CA, 8-10 Dec. 1988
Astronomy and Astrophysics
Astrophysics
Antiprotons, Cosmic Rays, Particle Flux Density, Particle Production, Point Sources, Radiation Distribution, Radioactive Decay
Scientific paper
The flux of cosmic ray antiprotons with kinetic energies between approx. 1 and 15 GeV is approx. 5 times greater than the flux predicted on the basis of the leaky-box model. This excess is attributed to secondary antineutron production in compact sources. Because the antineutrons are not confined by the magnetic field of the compact source, they leave the interaction site, decay in interstellar space and account for the apparent excess cosmic ray antiproton flux. The escape and decay of neutrons produced in association with the antineutrons is a source of cosmic ray protons. Observations of the angular variation of the intensity and spectral shape of 100 MeV photon rays produced by neutron-decay protons in the reaction p + p yields pion (0) yields 2 photons could reveal compact-source cosmic ray production sites. COS-B observations of spectral hardening near point sources, and future high-resolution observations of galactic point sources by Gamma-1 and the Egret telescope onboard the Gamma Ray Observatory may provide supporting evidence for this model.
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