The chemical compositions of two stars with enhanced metallicities

被引：0

作者：

Mishenina, TV ^{[1
]}

机构：

[1] Mechnikov Univ, Astron Observ, UA-270014 Odessa, Ukraine

来源：

ASTRONOMY REPORTS | 1998年 / 42卷 / 02期

关键词：

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Studies of the two stars HD 121370 (8 Boo) and HD 218640 (89 Aqr) with metallicity excesses based on spectra with resolution R = 25 000 and signal-to-noise ratios of more than 100 are presented. The spectra were obtained using the echelle spectrometer of the 6-m telescope of the Special Astrophysical Observatory. Atomic and molecular spectra are used to determine the abundances for 25 elements, including Li and elements of the CNO group. The metallicities [Fe/H] for the stars are +0.23 +/- 0.15 (8 Boo) and +0.19 +/- 0.19 (89 Aqr). These values are close to the upper limit of [Fe/H] for dwarf stars in the Galactic disk.

引用

页码：174 / 179

页数：6

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