Computer Science – Numerical Analysis
Scientific paper
Apr 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apjs...85..219s&link_type=abstract
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 85, no. 2, p. 219-247.
Computer Science
Numerical Analysis
285
Abundance, Light Elements, Monte Carlo Method, Nuclear Fusion, Nuclear Reactions, Baryons, Chemical Reactions, Lithium, Neutrons, Numerical Analysis, Protons, Star Distribution
Scientific paper
We present a comprehensive evaluation of the current status of the standard theory of primordial nucleosynthesis, determining the 12 nuclear reactions most important for the production of the light elements and conducting a detailed study of their rates and uncertainties; these are incorporated into a Monte Carlo analysis to evaluate uncertainties in the computed elemental abundances. These predicted abundances are compared with primordial abundances deduced from astronomical observations of the light elements D, He-3, He-4, and Li-7; consistent agreement exists over a narrow range of the baryon-to-photon ratio n, thereby supporting the standard theory of big bang nucleosynthesis. This n range corresponds to a constraint on the baryon density parameter of 0.01-0.09, where the primordial D + He-3 abundance sets the lower bound and the He-4 abundance sets the upper bound. The new reaction rates cause an increase in the upper bound from Li-7 by 40 percent over that determined in previous studies.
Kawano Lawrence H.
Malaney Robert A.
Smith Michael S.
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