| 银河系铝元素丰度研究 |
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| 引用本文： | 马文娟,李宏杰,张波.银河系铝元素丰度研究[J].天文学报,2019,60(5):15-21. |
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| 作者姓名： | 马文娟 李宏杰 张波 |
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| 作者单位： | 沧州师范学院物理与信息工程学院;河北科技大学理学院;河北师范大学物理科学与信息工程学院 |
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| 基金项目： | 国家自然科学基金项目(11403007、11673007)资助 |
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| 摘 要： | 恒星的Al元素丰度可以为探索星团和星系的化学演化提供重要线索.通过系统分析银河系薄盘、厚盘、核球、银晕以及M4、M5等球状星团中恒星的Al/Fe]随恒星金属丰度Fe/H]的变化趋势,得出银河系薄盘、厚盘和核球恒星的Al/Fe]随着Fe/H]的增加而缓慢下降,而球状星团M4和M5恒星的Al/Fe]随Fe/H]增加没有下降趋势,这暗示Ia超新星对M4和M5恒星元素丰度的贡献比较小.详细研究了银河系恒星Al/Fe]与Mg/Fe]、Na/Fe]的相关性,结果表明银河系场星的Al/Fe]与Mg/Fe]正相关,但在球状星团M4和M5恒星中未见此相关性;银河系盘星及M4和M5等球状星团恒星的Al/Fe]与Na/Fe]都存在正相关.
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| 关 键 词： | 恒星: 银河系 元素: 铝元素 恒星: 元素丰度 |
| 收稿时间： | 2018/12/26 0:00:00 |
| 修稿时间： | 2019/6/19 0:00:00 |
Study on the Aluminum Abundance of Stars in the Milky Way |
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| MA Wen-juan,LI Hong-jie and ZHANG Bo.Study on the Aluminum Abundance of Stars in the Milky Way[J].Acta Astronomica Sinica,2019,60(5):15-21. |
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| Authors: | MA Wen-juan LI Hong-jie and ZHANG Bo |
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| Institution: | Department of Physics and Information Engineering, Cangzhou Normal University, Cangzhou 061001,School of Science, Hebei University of Science and Technology, Shijiazhuang 050018 and Department of Physics Science and Information Engineering, Hebei Normal University, Shijiazhuang 050024 |
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| Abstract: | Al abundances of the stars can provide important clues for exploring the chemical evolution of the globular clusters and the galaxies. In this paper, we mainly study the trends of Al/Fe] with the stellar metallicity in stars of the thin disk, thick disk, bulge, halo of the Galaxy, and the Galactic globular clusters, such as M4 and M5. Furthermore, we investigate the correlations of Al/Fe] with Mg/Fe] and Na/Fe]. For the stars in the thin disk, thick disk, and bulge of the Galaxy, their Al/Fe] slowly decrease with the increasing Fe/H]. However, this decreased trend does not appear in stars of M4 and M5, which implies that the contributions from Type Ia supernovae to the elemental abundances of the stars in M4 and M5 are less than those to the field stars. There are positive correlations between Al/Fe] and Mg/Fe] of the field stars. However, this positive correlation between Al/Fe] and Mg/Fe] disappears in M4 and M5 stars. Variations of Al/Fe] have correlations with Na/Fe] in the Galactic disk stars and stars of globular clusters, such as M4 and M5. |
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| Keywords: | stars: the Milky Way element: aluminum stars: elemental abundance |
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