Abundance of zinc in the red giants of Galactic globular cluster 47 Tucanae
A. \v{C}erniauskas, A.Ku\v{c}inskas, J.Klevas, P.Bonifacio, H.-G., Ludwig, E.Caffau, M. Steffen

TL;DR
This study measures zinc abundances in red giant stars of 47 Tuc and finds no significant correlations with light element abundances or stellar positions, indicating separate nucleosynthesis pathways.
Contribution
First detailed zinc abundance analysis in 47 Tuc RGB stars showing no correlation with light elements or cluster dynamics.
Findings
Average [Zn/Fe] ratio is 0.11 with small star-to-star variation.
No significant correlation between zinc and light element abundances.
Zinc abundance shows no relation to stellar position or velocity.
Abstract
We investigate possible relations between the abundances of zinc and the light elements sodium, magnesium, and potassium in the atmospheres ofred giant branch (RGB) stars of the Galactic globular cluster 47~Tuc and study connections between the chemical composition and dynamical properties of the cluster RGB stars. The abundance of zinc was determined in 27 RGB stars of 47~Tuc using 1D local thermal equilibrium (LTE) synthetic line profile fitting to the high-resolution 2dF spectra obtained with the Anglo-Australian Telescope (AAT). Synthetic spectra used in the fitting procedure were computed with the SYNTHE code and 1D ATLAS9 stellar model atmospheres. The average 1D~LTE zinc-to-iron abundance ratio and its RMS variations due to star-to-star abundance spread determined in the sample of 27 RGB stars is . We did not detect any…
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