Fe I Oscillator Strengths for the Gaia-ESO Survey

Abstract

The Gaia-ESO Public Spectroscopic Survey (GES) is conducting a large-scale study of multi-element 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 142 transitions of Fe I between 3526 Å and 10864 Å, of which at least 38 are urgently needed by GES. We also assess the impact of these new data on solar spectral synthesis and demonstrate that for 36 lines that appear unblended in the Sun, Fe abundance measurements yield a small line-by-line scatter (0.08 dex) with a mean abundance of 7.44 dex in good agreement with recent publications.

Accepted for publication in Mon. Not. R. Astron. Soc

References in corpus (1)

• A grid of MARCS model atmospheres for late-type stars I. Methods and general properties

Cited by in corpus (41)

• The GALAH+ Survey: Third Data Release
• Gaia-ESO Survey: The analysis of high-resolution UVES spectra of FGK-type stars
• Observational constraints on the origin of the elements. IV: The standard composition of the Sun
• Non-LTE line formation of Fe in late-type stars - III. 3D non-LTE analysis of metal-poor stars
• Atomic data for the Gaia-ESO Survey
• Atomic and Molecular Data for Optical Stellar Spectroscopy
• The Gaia-ESO Public Spectroscopic Survey: Motivation, implementation, GIRAFFE data processing, analysis, and final data products
• Identical or fraternal twins? : The chemical homogeneity of wide binaries from Gaia DR2
• Fe I Oscillator Strengths for Transitions from High-lying Even-Parity Levels
• The Southern Stellar Stream Spectroscopic Survey (S5): Chemical Abundances of Seven Stellar Streams
• Non-LTE Radiative Transfer with Turbospectrum
• On the Use of Field RR Lyrae as Galactic Probes. II. A new $\Delta$S calibration to estimate their metallicity
• The Gaia-ESO Survey: homogenisation of stellar parameters and elemental abundances
• Chemical Abundance Analysis of Three $\alpha$-Poor, Metal-Poor Stars in the Ultra-Faint Dwarf Galaxy Horologium I
• OCCASO II. Physical parameters and Fe abundances of Red Clump stars in 18 Open Clusters
• Fe I oscillator strengths for transitions from high-lying odd-parity levels
• Stellar population astrophysics (SPA) with the TNG. Revisiting the metallicity of Praesepe (M44)
• Distant Relatives: The Chemical Homogeneity of Comoving Pairs Identified in Gaia
• Detailed Abundances of 15 Stars in the Metal-Poor Globular Cluster NGC 4833
• The R-Process Alliance: J1521-3538, a very metal-poor, extremely r-process-enhanced star with [Eu/Fe]=+2.2, and the class of r-III stars
• Stellar Population Astrophysics (SPA) with TNG Atmospheric parameters of members of 16 unstudied open clusters
• R-process-rich stellar streams in the Milky Way
• A new and homogeneous metallicity scale for Galactic classical Cepheids II. The abundance of iron and alpha elements
• The GAPS Programme at TNG -- XXV. Stellar atmospheric parameters and chemical composition through GIARPS optical and near-infrared spectra
• MELCHIORS: The Mercator Library of High Resolution Stellar Spectroscopy
• The chemical compositions and evolutionary status of red giants in the open cluster NGC 6940
• Chemical Abundances Of Open Clusters From High-Resolution Infrared Spectra. I. NGC 6940
• Metal-Rich RRc stars in the Carnegie RR Lyrae Survey
• Iron-Peak Element Abundances in Warm Very Metal-Poor Stars
• Evidence for multiple nucleosynthetic processes from carbon enhanced metal-poor stars in the Carina dwarf spheroidal galaxy
• NGC 6752 AGB Stars Revisited: I. Improved AGB temperatures remove apparent overionisation of Fe I
• Gaia-ESO Survey: Detailed elemental abundances in red giants of the peculiar globular cluster NGC 1851
• Abundances of disk and bulge giants from hi-res optical spectra: I. O, Mg, Ca, and Ti in the Solar neighborhood and Kepler field samples
• The Belgian repository of fundamental atomic data and stellar spectra (BRASS) II. Quality assessment of atomic data for unblended lines in FGK stars
• Chemical Compositions of Red Giant Stars from Habitable Zone Planet Finder Spectroscopy
• A second-generation star in a relic dwarf galaxy
• The R-Process Alliance: Hunting for gold in the near-UV spectrum of 2MASS J05383296-5904280
• The R-Process Alliance: Exploring the cosmic scatter among ten r-process sites with stellar abundances
• The chemical DNA of the Magellanic Clouds V. R-process dominates neutron capture elements production in the oldest SMC stars
• Spectroscopic data of Rb-isoelectronic Zr and Nb ions for astrophysical applications
• Chemical Abundance Analysis of Moving Group W11450 (Latham 1)