AGB yields and Galactic Chemical Evolution: last updated

TL;DR

This paper investigates the contribution of AGB stars to the solar system's s-process element abundances using an updated Galactic chemical evolution model with recent nuclear data and extended AGB yield ranges.

Contribution

It provides an improved set of AGB yields incorporating recent experimental data and extends the initial mass range for better modeling of s-process nucleosynthesis.

Findings

Updated AGB yields with recent nuclear reaction rates.

Enhanced modeling of s-process element production.

Better agreement with solar system abundances.

Abstract

We study the s-process abundances at the epoch of the Solar-system formation as the outcome of nucleosynthesis occurring in AGB stars of various masses and metallicities. The calculations have been performed with the Galactic chemical evolution (GCE) model presented by Travaglio et al. (1999, 2004). With respect to previous works, we used updated solar meteoritic abundances, a neutron capture cross section network that includes the most recent measurements, and we implemented the $s$-process yields with an extended range of AGB initial masses. The new set of AGB yields includes a new evaluation of the 22Ne(alpha, n)25Mg rate, which takes into account the most recent experimental information.