| 蓝离散星研究现状(Ⅰ):形成机制 |
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| 引用本文： | 新宇,邓李才,梁艳春.蓝离散星研究现状(Ⅰ):形成机制[J].天文学进展,2006,24(2):129-141. |
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| 作者姓名： | 新宇 邓李才 梁艳春 |
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| 作者单位： | 1. 中国科学院,国家天文台,北京,100012;中国科学院,国家天文台/云南天文台,昆明,650011
2. 中国科学院,国家天文台,北京,100012 |
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| 基金项目： | 国家自然科学基金资助项目(10173013、1033360、10403006、10433010)
科技部资助项目(G19990754) |
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| 摘 要： | 大量研究表明,蓝离散星的形成可能有多种机制,目前比较流行的形成机制可以概括为以下几类:密近双星系统的质量传输及双星并合、密集星场的恒星碰撞,以及包含双星系统的恒星间 (双星-单星、双星-双星)相互作用导致的恒星并合。与此同时,蓝离散星在各类恒星系统中的普遍存在,也使得研究这类恒星的形成及演化成为追踪恒星系统动力学演化、化学演化及积分光谱性质变化的有效指针。
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| 关 键 词： | 天体物理学 蓝离散星 综述 形成机制 密近双星 恒星碰撞 |
| 文章编号： | 1000-8349（2006）02-0129-13 |
| 收稿时间： | 08 12 2005 12:00AM |
| 修稿时间： | 2005-08-122006-01-25 |
The Status of Blue Straggler Studies(Ⅰ): Formation Mechanisms |
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| XIN Yu,DENG Li-cai,LIANG Yan-chun.The Status of Blue Straggler Studies(Ⅰ): Formation Mechanisms[J].Progress In Astronomy,2006,24(2):129-141. |
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| Authors: | XIN Yu DENG Li-cai LIANG Yan-chun |
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| Institution: | 1. National Astronomical 0bservatories, Chinese Academy of Sciences, Beijing 100012, China; 2.Yunnan 0bservatory, National Astronomical 0bservatories, Chinese Academy of Sciences, Kunming 650011, China |
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| Abstract: | Observations and theoretical studies show that several different mechanisms should be responsible for the formation of Blue Stragglers (BSs). This is true even within a single composite system. Nowadays, some popular mechanisms for the formation of BSs are: mass transfer and coalescence in close binary systems; stellar interactions in dense environments; and stellar coalescence caused by stellar resonant interactions in binary-binary and binary-single star systems. Meanwhile, BSs could be found almost in all kinds of stellar systems. They play important role in the dynamical and chemical evolution of stellar systems, and have great influence on the integrated spectral properties of stellar systems. Blue stragglers are useful tracers for the study of binary populations, stellar content and stellar evolution in composite stellar systems. |
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| Keywords: | astrophysics blue straggler review formation close binary system stellar collision |
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