Oxygen Abundances in Solar-Type Stars

被引：0
|
作者：
Johannes Reetz
机构：
[1] Universitäts-Sternwarte München,
来源：
Astrophysics and Space Science | 1999年 / 265卷
关键词：
Equivalent Width; Solar Neighborhood; Oxygen Abundance; Collision Strength; Abundance Gradient;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The absolute solar oxygen abundance,ε ⊙ = 8.80± 0.06, has been determined from various oxygen abundance indicators in different solar atlases, and a new method is proposed to test collision rate coefficientsfor the NLTE model of OI.Using effective temperatures derived from Balmer lines, oxygen abundances from O triplets in 83 solar-type stars within the solar neighborhood spanning a metallicity range of [Fe/H] = −2.3 ... +0.4 have been determined.NLTE effects are not negligible, especially in warm stars(Teff ≥ 5800) with [Fe/H] ≥ −0.5.
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页码：171 / 174
页数：3
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