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arXiv 1105.1126astro-ph.SRastro-ph.GA
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关于0 Z项目的状态报告

A Status Report on the 0Z Project

Judith G. Cohen, Norbert Christlieb, Andrew McWilliam, Stephen Shectman, Ian Thompson

摘要:

我们提出了一个更新的0 Z调查的状态,努力数据挖掘汉堡/ESO调查,以发现和详细研究大量的极端贫金属星系晕场星与[Fe/H] < -3 dex。在搜索了从HES中选出的1,565个候选者的中等分辨率光谱后,我们获得了其中103个最贫金属的高分辨率光谱。对所有这些恒星都进行了详细的丰度分析。这导致发现了18颗低于[Fe/H] -3.5 dex的新星和57颗低于-3.0 dex的新星。一些结果是关于我们的搜索异常的化学丰度的特定物种之间的样本的103颗恒星。忽略C和N,大约15%的样品在某种程度上是“异常”的。我们计划完成这个项目,并写最后一套文件的描述。

英文摘要:

We present an update on the status of the 0Z Survey, an effort to datamine the Hamburg/ESO Survey to find and study in detail a large sample of extremely metal-poor Galactic halo field stars with [Fe/H] < -3 dex. After searching 1,565 moderate resolution spectra of candidates selected from the HES, we have acquired high resolution spectra of 103 of the most metal-poor of them. Detailed abundance analyses have been performed for all these stars. This has resulted in the discovery of 18 new stars below [Fe/H] -3.5 dex and 57 below -3.0 dex. Some results are presented regarding our search for outliers in chemical abundances of particular species among the sample of 103 stars. Ignoring C and N, about 15% of the sample are "abnormal" in some way. Our plans to complete this project and write the final set of papers are described.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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