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Subaru/HDS Abundances in Three Giant Stars in the Ursa Minor Dwarf Spheroidal Galaxy
K. Sadakane, N. Arimoto, C. Ikuta +3
With the HDS (High Dispersion Spectrograph) on the Subaru telescope, we obtained high resolution optical region spectra of three red giant stars (cos 4, cos 82, and cos 347) in the…
Two distinct ancient components in the Sculptor Dwarf Spheroidal Galaxy: First Results from DART
Eline Tolstoy, M. J. Irwin, A. Helmi +14
We have found evidence for the presence of two distinct ancient stellar components (both geq 10 Gyr old) in the Sculptor dwarf spheroidal galaxy. We used the ESO Wide Field Imager…
Spectroscopic Studies of Extremly Metal-Poor Stars with Subaru/HDS:II.The r-process Elements, Including Thorium
S. Honda, W. Aoki, T. Kajino +5
We present the abundance analyses for the neutron-capture elements, and discuss the observed abundance distributions in very metal-poor stars with excesses of r-process elements. A…
Spectroscopic Studies of Extremely Metal-Poor Stars with Subaru/HDS:I. Observational Data
S. Honda, W. Aoki, H. Ando +14
We have obtained high-resolution (R 50,000 or 90,000), high-quality (S/N $\ga$ 100) spectra of 22 very metal-poor stars ([Fe/H] $\la$ -2.5) with the High Dispersion Spectr…