Abundance uncertainties obtained with the PIZBUIN framework for Monte Carlo reaction rate variations

Rauscher, T.; Nishimura, N.; Cescutti, G.; Hirschi, R.; Murphy, A. St. J.

Abstract

Uncertainties in nucleosynthesis models originating from uncertainties in astrophysical reaction rates were estimated in a Monte Carlo variation procedure. Thousands of rates were simultaneously varied within individual, temperature-dependent errors to calculate their combined effect on final abundances. After a presentation of the method, results from application to three different nucleosynthesis processes are shown: the γ-process and the s-process in massive stars, and the main s-process in AGB stars (preliminary results). Thermal excitation of nuclei in the stellar plasma and the combined action of several reactions increase the final uncertainties above the level of the experimental errors. The total uncertainty, on the other hand, remains within a factor of two even in processes involving a large number of unmeasured rates, with some notable exceptions for nuclides whose production is spread over several stellar layers and for s-process branchings.

Citation

Rauscher, T., Nishimura, N., Cescutti, G., Hirschi, R., & Murphy, A. S. J. (2018). Abundance uncertainties obtained with the PIZBUIN framework for Monte Carlo reaction rate variations. AIP conference proceedings, 1947(1), https://doi.org/10.1063/1.5030819

• Journal Article Type: Conference Paper
• Conference Name: 14TH INTERNATIONAL SYMPOSIUM ON ORIGIN OF MATTER AND EVOLUTION OF GALAXIES (OMEG 2017)
• Conference Location: Daejeon, Korea
• Online Publication Date: Apr 25, 2018
• Publication Date: 2018
• Deposit Date: Jun 14, 2023
• Journal: AIP Conference Proceedings
• Print ISSN: 0094-243X
• Publisher: AIP Publishing
• Peer Reviewed: Peer Reviewed
• Volume: 1947
• Issue: 1
• DOI: https://doi.org/10.1063/1.5030819