# On the nature of the core of $\alpha$ Centauri A: the impact of the metallicity mixture

## TL;DR

This study investigates how different metallicity mixtures affect the modeling of the core of $e1$ Centauri A, emphasizing the importance of this star in calibrating models of solar-like stars with convective cores.

## Contribution

It demonstrates that most models fitting the star's mass predict convective cores regardless of metallicity mixture, supporting its use in stellar model calibration.

## Key findings

- Over 70% of models with the star's mass have convective cores.
- Metallicity mixture variations do not significantly alter core predictions.
- Supports using $e1$ Centauri A for calibrating stellar models.

## Abstract

Forward asteroseismic modelling plays an important role towards a complete understanding of the physics taking place in deep stellar interiors. With a dynamical mass in the range over which models develop convective cores while in the main sequence, the solar-like oscillator $\alpha$ Centauri A presents itself as an interesting case study. We address the impact of varying the metallicity mixture on the determination of the energy transport process at work in the core of $\alpha$ Centauri A. We find that $\gtrsim$ 70$\%$ of models reproducing the revised dynamical mass of $\alpha$ Centauri A have convective cores, regardless of the metallicity mixture adopted. This is consistent with the findings of Nsamba et al., where nuclear reaction rates were varied instead. Given these results, we propose that $\alpha$ Centauri A be adopted in the calibration of stellar model parameters when modelling solar-like stars with convective cores.