Chemical Composition of Carbon-Rich, Very Metal-Poor Subgiant LP 625-44 Observed with the Subaru/HDS ∗
Chemical Composition of Carbon-Rich, Very Metal-Poor Subgiant LP 625-44 Observed with the Subaru/HDS ∗
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DOI：
10.1093/pasj/54.3.427
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发表时间：
2002-04
影响因子：
2.3
通讯作者：
W. Aoki;H. Ando;S. Honda;M. Iye;H. Izumiura;T. Kajino;E. Kambe;S. Kawanomoto;K. Noguchi;K. Okita;K. Sadakane;B. Sato;I. Shelton;M. Takada-Hidai;Y. Takeda;E. Watanabe;M. Yoshida
中科院分区：
文献类型：
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作者：
W. Aoki;H. Ando;S. Honda;M. Iye;H. Izumiura;T. Kajino;E. Kambe;S. Kawanomoto;K. Noguchi;K. Okita;K. Sadakane;B. Sato;I. Shelton;M. Takada-Hidai;Y. Takeda;E. Watanabe;M. Yoshida
我们利用斯巴鲁望远镜的高色散光谱仪（HDS）进行了详细的丰度研究，获得了富含碳和s过程元素，非常贫金属（[Fe/H] =−2.7）的亚巨星LP 625-44和HD 140283（丰度比正常的贫金属亚巨星）的高分辨率（R ~ 90000）光谱进行比较。LP 625-44中的氧气过剩似乎是显著的（可能是近10倍），相比之下，HD 140283来自于7770 u左右的O - I三重体
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