Scl-1013644：玉夫座矮球状星系中的一颗CEMP-s恒星
Scl-1013644: a CEMP-s star in the Sculptor Dwarf Spheroidal Galaxy
摘要：
最近对银河系及其卫星的研究特别关注碳增强贫金属（CEMP）恒星的重要性，因为它们参与了银河系的形成历史，并且可能与第一代恒星的化学元素有关。在对玉夫座矮星系红巨星的研究中，我们发现了一颗具有极强CN和CH分子带的恒星。这颗恒星Scl-1013644先前已被Geisler等人（2005）确认为一颗重元素富集的恒星。光谱合成用于推导Scl-1013644的碳、氮和钡丰度。我们的发现是[C/Fe] =+0.8，[N/Fe] = -0.3和[Ba/Fe] = +2.1，后者的结果与Geisler等人（2005）发现的值一致。这些结果显示Scl-1013644是一颗CEMP-s恒星，是在这个矮星系中发现的第三颗这样的恒星。
英文摘要：
Recent studies of the Milky Way and its satellites have paid special attention to the importance of carbon-enhanced metal-poor (CEMP) stars due to their involvement in Galactic formation history and their possible connection with the chemical elements originating in the first stellar generation. In an ongoing study of red giants in the Sculptor dwarf galaxy we have discovered a star with extremely strong CN and CH molecular bands. This star, Scl-1013644, has previously been identified by Geisler et al. (2005) as a star with an enrichment in the heavy elements. Spectrum synthesis has been used to derive the carbon, nitrogen and barium abundances for Scl-1013644. Our findings are [C/Fe] = +0.8, [N/Fe] = -0.3 and [Ba/Fe] = +2.1 with the latter result consistent with the value found by Geisler et al. (2005). These results reveal Scl-1013644 as a CEMP-s star, the third such star discovered in this dwarf galaxy.
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