566 citations · 1.7k across the 12 of their papers we have counts for
5 papers · 2 filters
The Binary Frequency Among Carbon-Enhanced, s-Process Rich, Metal-Poor Stars
Sara Lucatello, Stelios Tsangarides, Timothy C. Beers +3
We discuss radial velocities for a sample of carbon-enhanced, s-process rich, very metal-poor stars (CEMP-s hereafter), analyzed with high-resolution spectroscopy obtained over mul…
On the Binarity of Carbon-Enhanced, Metal-Poor Stars
S. Tsangarides, S. G. Ryan, T. C. Beers
We report on a programme to monitor the radial velocities of a sample of candidate and confirmed carbon-enhanced, metal-poor (CEMP) stars. We observed 45 targets using the Echelle…
A low upper-limit on the lithium isotope ratio in HD140283
Wako Aoki, Susumu Inoue, Satoshi Kawanomoto +4
We have obtained a high-S/N (900-1100), high-resolving-power (R=95000) spectrum of the metal-poor subgiant HD 140283 in an effort to measure its 6Li/7Li isotope ratio. From a 1-D a…
Oxygen Overabundance in the Extremely Iron-Poor Star CS29498-043
Wako Aoki, John E. Norris, Sean G. Ryan +4
An abundance analysis for the carbon-enhanced, extremely iron-poor ([Fe/H] -3.5) star CS29498-043 has been obtained using new high-resolution, high signal-to-noise spectra from the…
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…