Abundance ratios in Galactic bulge stars

被引：0
|
作者：
McWilliam, A [1 ]
Rich, RM [1 ]
机构：
[1] Observ Carnegie Inst Washington, Pasadena, CA 91101 USA
来源：
CHEMICAL EVOLUTION FROM ZERO TO HIGH REDSHIFT | 1999年
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：
We discuss how abundance ratios can help unravel the evolutionary history of the Galactic bulge. An LTE abundance analysis of a solar-[Fe/H] bulge red giant star reveals that the su-elements O, Mg, Si, Ca and Ti are enhanced by +0.3 dex, the r-process element Eu is enhanced by +0.5 dex and the Ba/Eu ratio is -0.5. These ratios are characteristic of normal halo composition, and suggest that the bulge reached solar [Fe/H] in less than 1Gyr.
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页码：73 / 82
页数：10
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