The NuGrid AGB evolution and nucleosynthesis data set
Date
2022
Authors
Battino, Umberto
Pignatari, Marco
Tattersall, Ashley
Denissenkov, Pavel
Herwig, Falk
Journal Title
Journal ISSN
Volume Title
Publisher
Universe
Abstract
Asymptotic Giant Branch (AGB) stars play a key role in the chemical evolution of galaxies.
These stars are the fundamental stellar site for the production of light elements such as C, N and F,
and half of the elements heavier than Fe via the slow neutron capture process (s-process). Hence,
detailed computational models of AGB stars’ evolution and nucleosynthesis are essential for galactic
chemical evolution. In this work, we discuss the progress in updating the NuGrid data set of AGB
stellar models and abundance yields. All stellar models have been computed using the MESA stellar
evolution code, coupled with the post-processing mppnp code to calculate the full nucleosynthesis.
The final data set will include the initial masses Mini/M = 1, 1.65, 2, 3, 4, 5, 6 and 7 for initial
metallicities Z = 0.0001, 0.001, 0.006, 0.01, 0.02 and 0.03. Observed s-process abundances on the
surfaces of evolved stars as well as the typical light elements in the composition of H-deficient
post-AGB stars are reproduced. A key short-term goal is to complete and expand the AGB stars data
set for the full metallicity range. Chemical yield tables are provided for the available models.
Description
Keywords
stellar evolution, nucleosynthesis, AGB
Citation
APA style