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
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D O I：
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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.
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页码：174 / 179
页数：6
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