HE 1327-2326, An Unevolved Star with [Fe/H] < -5.0. I. A Comprehensive Abundance Analysis
Aoki, Wako; Frebel, Anna; Christlieb, Norbert; Norris, John; Beers, Timothy C; Minezaki, Takeo; Barklem, Paul S; Honda, Satoshi; Takada-Hidai, Masahide; Asplund, Martin; Ryan, Sean G; Tsangarides, Stelios; Eriksson, Kjell; Steinhauer, A; Deliyannis, C P; Nomoto, Ken'ichi; Fujimoto, Masayuki Y; Ando, Hiroyasu; Yoshii, Yuzuru; Kajino, Toshitaka
We present the elemental abundances of HE 1327-2326, the most iron-deficient star known, determined from a comprehensive analysis of spectra obtained with the Subaru Telescope High Dispersion Spectrograph. HE 1327-2326 is either in its main-sequence or subgiant phase of evolution. Its non-LTE-corrected iron abundance is [Fe/H] = -5.45, 0.2 dex lower than that of HE 0107-5240, the previously most iron-poor object known, and more than 1 dex lower than those of all other metal-poor stars. Both HE...[Show more]
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