Oxygen abundances: new results from [O I] lines

被引：16

作者：

Sneden, C ^{[1
]}

Primas, F

机构：

[1] Univ Texas, Dept Astron, Austin, TX 78712 USA

[2] European So Observ, D-8046 Garching, Germany

来源：

NEW ASTRONOMY REVIEWS | 2001年 / 45卷 / 08期

基金：

美国国家科学基金会;

关键词：

oxygen/iron ratios; metal-poor stars;

D O I：

10.1016/S1387-6473(01)00115-4

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Supersolar oxygen-to-iron ratios are known to exist in nearly all metal-poor stars. But there is no general agreement on the magnitude of these relative overabundances. New high resolution spectra of evolved stars over a large metallicity range have been gathered, from which lines of [O I], Sc II, and Fe II have been measured. Abundance ratios [O/Sc] and [O/Fe], insensitive to most model atmospheric uncertainties, have been derived and correlated with overall metallicity. These ratios both are consistent with earlier studies of the [O I] lines in metal-poor stars: [O/Sc]similar or equal to [O/Fe]similar or equal to +0.4, with possibly a small upward trend with decreasing [Fe/H]. (C) 2001 Elsevier Science BY. All rights reserved.

引用

页码：513 / 518

页数：6

共 25 条

[1] The oxygen abundances in halo dwarfs .1. HD 103095 [J].