Impact of NLTE on determinations of atmospheric parameters and chemical abundances of very metal-poor stars
Lyudmila Mashonkina, Tatyana Sitnova, Yuri Pakhomov, Tatyana, Ryabchikova
TL;DR
This paper examines how non-local thermodynamic equilibrium (NLTE) effects influence the accuracy of atmospheric parameter and chemical abundance determinations in very metal-poor stars using high-resolution spectra.
Contribution
It provides an assessment of NLTE impacts on abundance analysis methods for very metal-poor stars, highlighting the importance of NLTE corrections.
Findings
NLTE effects significantly alter abundance measurements
NLTE corrections improve agreement with theoretical models
The study offers guidelines for more accurate abundance determinations
Abstract
Based on high-resolution spectral observations for a sample of very metal-poor stars, we investigate how well stellar chemical abundances can be derived with available theoretical methods and computational tools.
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