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Searching for Planets in the Hyades. IV. Differential Abundance Analysis of Hyades Dwarfs*

机译:在海德斯寻找行星。 IV。海德斯矮人的差分丰度分析*

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摘要

We present a differential abundance analysis of Hyades F–K dwarfs in search for evidence of stellar enrichment from accreted hydrogen-deficient disk material. Metallicities and relative abundance ratios of several species have been determined. We derive a cluster mean [Fe/H] = 0.13 ± 0.01. Two stars show abundances ~0.2 dex larger than the cluster mean. In addition, one star, which was added by a recent study as a cluster member, shows significantly lower abundances than the cluster mean. These three stars have questionable membership characteristics. The remaining stars in the survey have an rms of 0.04 dex in the differential [Fe/H] values. The Hyades cluster members have apparently not been significantly chemically enriched. The abundance ratios of Si, Ti, Na, Mg, Ca, and Zn with respect to Fe are in their solar proportions.
机译:我们提出Hyades F–K矮星的差异丰度分析,以寻找从积淀的缺氢磁盘材料中恒星富集的证据。已经确定了几种金属的金属性和相对丰度比。我们得出簇平均[Fe / H] = 0.13±0.01。两颗星显示的丰度比星团均值大〜0.2 dex。另外,最近的一项研究将一颗恒星添加为星团成员,其丰度明显低于星团平均值。这三颗星的会员资格令人怀疑。调查中的其余恒星的[Fe / H]差值的均方根值为0.04 dex。 Hyades簇成员显然没有明显的化学富集。 Si,Ti,Na,Mg,Ca和Zn相对于Fe的丰度比处于其太阳能比例。

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