NLTE effects on Fe I/II in the atmospheres of FGK stars and application to abundance analysis of their spectra

Abstract

We describe the first results from our project aimed at large-scale calculations of NLTE abundance corrections for important astrophysical atoms and ions. In this paper, the focus is on Fe which is a proxy of stellar metallicity and is commonly used to derive effective temperature and gravity. We present a small grid of NLTE abundance corrections for Fe I lines and discuss how NLTE effects influence determination of effective temperature, surface gravity, and metallicity for late-type stars.

6 pages, to be published in IOP The Journal of Physics: Conference Series, proceedings of the Workshop: 'Stellar Atmospheres in the Gaia Era: Quantitative Spectroscopy and Comparative Spectrum Modelling', Brussels, June 2011

References in corpus (1)

• A non-LTE study of neutral and singly-ionized iron line spectra in 1D models of the Sun and selected late-type stars

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• Exploring the dependence of chemical traits on metallicity: chemical trends for red giant stars with asteroseismic ages