# Implications for Post-Processing Nucleosynthesis of Core-Collapse Supernova Models with Lagrangian Particles

## TL;DR

This paper examines the uncertainties in post-processing nucleosynthesis calculations in 2D core-collapse supernova models, highlighting limitations of tracer particles and proposing detailed analysis of these effects across multiple progenitor models.

## Contribution

It provides a comprehensive analysis of uncertainties in nucleosynthesis post-processing in 2D CCSN models using tracer particles, across different progenitor masses.

## Key findings

- Tracer particle resolution affects nucleosynthesis accuracy.
- Thermodynamic inconsistencies impact composition evolution.
- Uncertainties vary with progenitor mass and explosion dynamics.

## Abstract

We investigate core-collapse supernova (CCSN) nucleosynthesis with self-consistent, axisymmetric (2D) simulations performed using the radiation-hydrodynamics code Chimera. Computational costs have traditionally constrained the evolution of the nuclear composition within multidimensional CCSN models to, at best, a 14-species $\alpha$-network capable of tracking only $(\alpha,\gamma)$ reactions from $^{4}$He to $^{60}$Zn. Such a simplified network limits the ability to accurately evolve detailed composition and neutronization or calculate the nuclear energy generation rate. Lagrangian tracer particles are commonly used to extend the nuclear network evolution by incorporating more realistic networks in post-processing nucleosynthesis calculations. However, limitations such as poor spatial resolution of the tracer particles, inconsistent thermodynamic evolution, including misestimation of expansion timescales, and uncertain determination of the multidimensional mass-cut at the end of the simulation impose uncertainties inherent to this approach. We present a detailed analysis of the impact of such uncertainties for four self-consistent axisymmetric CCSN models initiated from stellar metallicity, non-rotating progenitors of 12 $M_\odot$, 15 $M_\odot$, 20 $M_\odot$, and 25 $M_\odot$ and evolved with the smaller $\alpha$-network to more than 1 s after the launch of an explosion.