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Very Metal-poor Stars Observed by the RAVE Survey

机译:狂欢调查观察到非常金属贫乏的明星

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Radial Velocity Experiment (RAVE) observed~500,000 southern sky stars between 2003 and 2013 in the infra-red calcium triplet (Call) spectral region. In this study we extended the analysis of RAVE very metal-poor stars ([Fe/H] < -2) presented by Fulbright et al. (2010). We employed a novel method for identifying the metal-poor stars and developed a tool for modeling Call lines where we also modeled the background noise to avoid systematical biases in the equivalent width (EW) measurements. Final metallicity values were derived with a flexible calibration approach using only 2MASS photometric data and EW measurements obtained from the RAVE spectra.
机译:径向速度实验(Rave)在红外线钙三联(呼叫)光谱区域2003和2013之间观察到〜500,000南斯天空恒星。在这项研究中,我们延长了富布赖特等人呈现的狂欢度差的恒星([Fe / H] <-2)的分析。 (2010)。我们采用了一种识别金属贫乏恒星的新方法,并开发了一种用于建模呼叫线的工具,在那里我们还建模了背景噪声,以避免等效宽度(EW)测量中的系统偏差。使用仅使用2MASS光度数据和从Rave Spectra获得的EW测量来导出最终金属性值。

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