双星对星族合成研究的重要性  

The Importance of Binaries in Stellar Population Synthesis Studies

作　　者：李忠木[1] 

机构地区：[1]大理学院天文学与科技史研究所,云南大理671003

出　　处：《大理学院学报（综合版）》2013年第10期23-26,共4页Journal of Dali University

基　　金：国家自然科学基金资助项目(11203005);云南省应用基础研究项目(2009CD093);云南省教育厅科研基金重点项目(2010Z004)

摘　　要：观测显示星系中的大部分恒星是双星,因此星族合成研究必须考虑双星的作用。综述双星对星族合成研究的重要性。主要讨论了双星对早型星系和球状星团的能谱、谱指数、颜色、颜色-星等图、星系参数确定和恒星形成历史研究的影响。主要结论为双星有助于对星系和星团的光谱、颜色-星等图的解释,以及对星系和星团多个参数的准确确定。因此,双星是准确星族合成研究的必然要求。Observations show that most stars are in binaries, which indicates that binaries should be taken into account in stellar popu- lation synthesis studies. This paper reviews the importance of binaries in the studies of stellar populations. The effects of binaries on the spectral energy distributions, line strength indices, colours, colour-magnitude diagrams, parameter determinations, and star forma- tion histories are discussed. The review shows that binaries are very helpful for the explanations of spectra and colour-magnitude dia- grams of galaxies and star clusters, and they also affect the determinations of many important parameters. Therefore, the inclusion of bi- naries is a natural trend for future stellar population studies.

关 键 词：双星 星族合成 星系 星团 

分 类 号：P153[天文地球—天文学]