Comparison of Two Distinct BBN Codes

Details Comparison of Two Distinct BBN Codes Comparison of Two Distinct BBN Codes

1998-06-03

arxiv.org/abs/astro-ph/9806057v1

Astronomy and Astrophysics

Astrophysics

7 pages, LaTex, 4 Postscript figures; to appear in the Proceedings of the Second Oak Ridge Symposium on Atomic & Nuclear Astro

Scientific paper

This paper compares the results of two SBBN codes developped independently by different teams of physicists. These two codes have significant differences that lead to a discrepency between their final mass fractions of Helium-4 of 0.003. This paper shows that the mass fractions of each code had different orders of convergence, and how the number of timesteps affects the accuracy of the mass fractions. At the end, the paper shows how to modify both codes so that their Helium-4 mass fractions agree to around 0.0001.

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