Consistent Iron Abundances Derived from Neutral and Singly Ionized Iron Lines in Ultraviolet and Optical Spectra of Six Warm Metal-poor Stars

Neutral Fe lines in metal-poor stars yield conflicting abundances depending on whether and how deviations from local thermodynamic equilibrium (LTE) are considered. We have collected new high-resolution and high signal-to-noise ultraviolet (UV) spectra of three warm dwarf stars with [Fe/H] ≈ −2.9 wi...

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Veröffentlicht in:	The Astrophysical journal 2018-06, Vol.860 (2), p.125
Hauptverfasser:	Roederer, Ian U., Sneden, Christopher, Lawler, James E., Sobeck, Jennifer S., Cowan, John J., Boesgaard, Ann Merchant
Format:	Artikel
Sprache:	eng
Schlagworte:	Abundance Astrophysics Broadband Color temperature Dwarf stars Hubble Space Telescope Iron Local thermodynamic equilibrium Mathematical analysis Metallicity Metals Parameters Space telescopes Ultraviolet spectra Wavelengths
Online-Zugang:	Volltext
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