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Fe I Oscillator Strengths for the Gaia-ESO Survey



Matthew Ruffoni, E. A. Den Hartog, James E. Lawler, N. R. Brewer, K. Lind, Gillian Nave, J C. Pickering


The Gaia-ESO Public Spectroscopic Survey (GES) is conducting a large-scale study of multielement chemical abundances of some 100; 000 stars in the Milky Way with the ultimate aim of quantifying the formation history and evolution of young, mature and ancient Galactic populations. However, in preparing for the analysis of GES spectra, it has been noted that atomic oscillator strengths of important Fe I lines, required to correctly model stellar line intensities, are missing from the atomic database. Here, we present new, experimental oscillator strengths, derived from branching fractions and level lifetimes, for 130 transitions of Fe I between 3526 °A and 10864 A° , of which at least 35 are urgently needed by GES.
Monthly Notices of the Royal Astronomical Society


atomic data—line, profiles—methods, laboratory—techniques, spectroscopic


Ruffoni, M. , Den Hartog, E. , Lawler, J. , Brewer, N. , Lind, K. , Nave, G. and Pickering, J. (2014), Fe I Oscillator Strengths for the Gaia-ESO Survey, Monthly Notices of the Royal Astronomical Society, [online], (Accessed April 13, 2024)
Created May 27, 2014, Updated July 3, 2023