Is beryllium in metal-poor stars of galactic or cosmological origin?

Details Is beryllium in metal-poor stars of galactic or cosmological origin? Is beryllium in metal-poor stars of galactic or cosmological origin?

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992natur.357..379g&link_type=abstract

Nature (ISSN 0028-0836), vol. 357, no. 6377, June 4, 1992, p. 379-384. Research supported by NFR.

Mathematics

Logic

101

Beryllium, Big Bang Cosmology, Interstellar Matter, Nuclear Fusion, Stellar Composition, Astronomical Spectroscopy, Chemical Evolution, Galactic Cosmic Rays, Galactic Evolution, Metallicity

Scientific paper

Standard Big Bang nucleosynthesis predicts a very small primordial abundance of beryllium. Observations of nine very metal-poor stars indicate a beryllium abundance roughly proportional to the oxygen abundance, a trend that can be explained in terms of galactic chemical evolution. Combining this rate of beryllium production with recent observations of boron and lithium in similar stars yields an upper limit to the primordial beryllium abundance several orders of magnitude greater than the cosmological prediction, a result that can be explained by cosmic-ray activity in the early Galaxy.

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