Type Ia Supernova Nucleosynthesis: Metallicity-Dependent Yields

TL;DR

This study provides detailed metallicity-dependent nucleosynthesis yields for various Type Ia supernova models, enhancing understanding of their role in galactic chemical evolution.

Contribution

It offers comprehensive, metallicity-dependent yield tables for 39 SNIa models, based on three progenitors, using consistent nuclear reaction networks, which were previously unavailable.

Findings

Yields vary significantly with progenitor metallicity.

Type Ia supernovae produce about 70% of solar iron.

Results compare favorably with existing models.

Abstract

Type Ia supernova explosions (SNIa) are fundamental sources of elements for the chemical evolution of galaxies. They efficiently produce intermediate-mass (with Z between 11 and 20) and iron group elements - for example, about 70% of the solar iron is expected to be made by SNIa. In this work, we calculate complete abundance yields for 39 models of SNIa explosions, based on three progenitors - a 1.4M deflagration detonation model, a 1.0 double detonation model and a 0.8 M double detonation model - and 13 metallicities, with 22Ne mass fractions of 0, 1x10-7, 1x10-6, 1x10-5, 1x10-4, 1x10-3, 2x10-3, 5x10-3, 1x10-2, 1.4x10-2, 5x10-2, and 0.1 respectively. Nucleosynthesis calculations are done using the NuGrid suite of codes, using a consistent nuclear reaction network between the models. Complete tables with yields and production factors are provided online at Zenodo: Yields. We discuss the main properties of our yields in the light of the present understanding of SNIa nucleosynthesis, depending on different progenitor mass and composition. Finally, we compare our results with a number of relevant models from the literature.