Chemical Composition of Carbon-Rich, Very Metal-Poor Subgiant LP 625-44 Observed with the Subaru/HDS ∗
/ Authors
W. Aoki, H. Ando, S. Honda, M. Iye, H. Izumiura, T. Kajino, E. Kambe, S. Kawanomoto, K. Noguchi, K. Okita
and 7 more authors
K. Sadakane, B. Sato, I. Shelton, M. Takada-Hidai, Y. Takeda, E. Watanabe, M. Yoshida
/ Abstract
We have obtained high-resolution (R ∼ 90000) spectra of the carbon- and s-process-element-rich, very metalpoor ([Fe/H] = −2.7) subgiant LP 625-44, as well as those of HD 140283 (a metal-poor subgiant with normal abundance ratio) for a comparison, with the High Dispersion Spectrograph (HDS) for the Subaru Telescope for detailed abundance study. The excess of oxygen in LP 625-44 seems to be remarkable (perhaps by nearly a factor 10) compared with that of HD 140283 derived from the O I triplet around 7770 u
Journal: Publications of the Astronomical Society of Japan