Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...336l...1b&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 336, Jan. 1, 1989, p. L1-L4. Research supported by NASA. Previous
Astronomy and Astrophysics
Astrophysics
21
Abundance, Erosion, Light Elements, Photons, Photonuclear Reactions, Active Galactic Nuclei, Big Bang Cosmology, Chemical Evolution, Cosmic Rays, High Energy Interactions, Spallation
Scientific paper
The abundances of the rare light elements H-2, He-3, Li-7, and B-11 are shown to be potentially affected by photoerosion. That process, involving the interaction of high energy photons from galactic centers with atomic nuclei, will increase the abundances of H-2, He-3, and B-11 while lowering slightly those of Li-7 and He-4. In some regions of galaxies the effects may be large enough to impact their chemical evolution. In particular, this process may have enhanced the H-2 and He-3 abundances near the center of our galaxy over and above those from the big bang, as well as the galactic B-11 abundance over that from cosmic-ray spallation.
Boyd Richard N.
Ferland Gary J.
Schramm David N.
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