Photoerosion and the abundances of the light elements

Details Photoerosion and the abundances of the light elements Photoerosion and the abundances of the light elements

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.

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