2011/06/07 by Alexandre Arbey · 139 citations
Physics and Astronomy · #Astrophysics #Big Bang nucleosynthesis #Byte #Computer science #Cosmology and Gravitation Theories #Identifier #Nuclear physics research studies #Nucleosynthesis #Particle physics theoretical and experimental studies #Physics #Programming language #Supernova #astro-ph.CO #hep-ph
paper · pdf · doi:10.1016/j.cpc.2012.03.018
published in Computer Physics Communications 183(8), 1822-1831 (Elsevier BV) · 15 pages, 1 figure, 1 table. AlterBBN can be obtained from https://alterbbn.hepforge.org/
arxiv created 2011/06/07 · openalex publication_date 2012/03/23 · arxiv updated 2016/12/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We describe AlterBBN, a public C program for evaluating the abundances of the elements generated by Big-Bang nucleosynthesis (BBN). This program enables the user to compute the abundances of the elements in the standard model of cosmology, and additionally provides possibilities to alter the assumptions of the cosmological model in order to study their consequences on the abundances of the elements. In particular the baryon-to-photon ratio and the effective number of neutrinos, as well as the expansion rate and the entropy content of the Universe during BBN can be modified in AlterBBN. Such features allow the user to test the cosmological models by confronting them to BBN constraints. A presentation of the physics of BBN and the features of AlterBBN is provided here under the form of a manual.