The analysis of lithium in HD166473

TL;DR

This study investigates lithium abundance in HD166473 across its rotational phases by analyzing spectral lines and magnetic field models, revealing phase-dependent lithium variations influenced by magnetic effects.

Contribution

It introduces a method combining spectral line analysis with magnetic field modeling to determine lithium abundance variations over the star's rotation.

Findings

Lithium abundance varies with rotational phase.

Magnetic field influences lithium line profiles.

Phase-dependent lithium measurements were achieved.

Abstract

The analysis of Li I 6708A line was performed for 6 rotational phases distributed over the whole rotational period (9.5 years) of HD166473. The magnetic field model was constructed based on the polarimetric measurements from (Mathys et al. 20007). For each observed phase the modulus of the magnetic field was also estimated from simulation of the Fe II 6147A, 6149A and Pr III 6706.7A line profiles taking into account Zeeman magnetic splitting. The lithium abundance in each phase was obtained from fitting the observed Li I 6708A profile with the synthetic one calculated assuming Paschen-Back splitting and estimated magnetic field characteristics from Pr III 6706.7A line profile.