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arXiv 1407.5375astro-ph.SR
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两颗高自行星HD 102870和BD +20 3603的高分辨阶梯光谱

High Resolution Echelle Spectroscopy of Two High Proper Motion Stars: HD 102870 and BD+20 3603

S. Oktay Solakci, Timur Sahin, Christopher Flynn, Ahmet Dervisoglu

摘要:

本文对从{ \sc DIE}库中选出的两颗F型高自行星进行了化学丰度分析。我们使用高分辨率(R= 42\,000)和高信噪比(S/N=103,36 $-$/$-$象素)埃歇尔谱来自HD 102870和BD 10203603的{ \sc \sc DIE}库,作为两颗代表性的F型高自行星,测定从Y到Ba的慢(s)$-$和快(r)$-$过程元素等16种化学元素的基本参数和光球丰度。恒星的化学成分和运动学参数表明它们属于不同的银河系星族:HD 102870是一颗薄盘星,而BD +20\,3603是一颗贫金属的HPM星,是一颗晕星.

英文摘要:

A chemical abundance analysis is made of two F type high proper motion stars selected from the {\sc ELODIE} library. We use high resolution (R=42\,000) and high signal to noise ratio (S/N=103, 36 $-$per$-$pixel) échelle spectra from the {\sc ELODIE} library of HD\,102870 and BD\,+20\,3603, as two representative F type high proper motion stars, to determine fundamental parameters and photospheric abundances of 16 chemical elements including slow (s)$-$ and rapid (r)$-$process elements from Y to Ba. The chemical composition and kinematic parameters of the stars imply that they belong to different Galactic populations: we report HD\,102870, an IAU standard radial velocity star, to be a thin disk star and BD\,+20\,3603, a metal-poor HPM star, to be a halo star.

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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