中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
A Study of Binary Stellar Population Synthesis of Elliptical Galaxies

文献类型:期刊论文

作者Zhongmu Li; Fenghui Zhang; Zhanwen Han
刊名Chinese Journal of Astronomy and Astrophysics
出版日期2006
卷号6期号:6页码:669
ISSN号1009-9271
英文摘要We determined the relative stellar ages and metallicities of about 80 elliptical galaxies in both low and high density environments using the latest binary stellar population (BSP) synthesis model and tested the predictions of a recent hierarchical formation model that adopted the new ACDM cosmology.The stellar ages and metallicities were estimated from two high-quality published spectra line indices, the Hβ and MgFe indices. The results show that the stellar populations of elliptical galaxies are older than 3.9 Gyr and more metal rich than 0.02. Most of our results are in agreement with the model predictions: (1) elliptical galaxies in denser environment are redder and have older populations than field galaxies; (2)elliptical galaxies with more massive stellar components are redder and have older and more metal rich populations than less massive ones; (3) the most massive galaxies have the oldest and most metal rich stars. However, some of our results differ from the model predictions on the metallicity distributions of low- and high-density elliptical galaxies and the dependence on the distance to the cluster center.
语种英语
源URL[http://ir.bao.ac.cn/handle/114a11/52328]  
专题中国科学院国家天文台
作者单位中国科学院国家天文台
推荐引用方式
GB/T 7714
Zhongmu Li,Fenghui Zhang,Zhanwen Han. A Study of Binary Stellar Population Synthesis of Elliptical Galaxies[J]. Chinese Journal of Astronomy and Astrophysics,2006,6(6):669.
APA Zhongmu Li,Fenghui Zhang,&Zhanwen Han.(2006).A Study of Binary Stellar Population Synthesis of Elliptical Galaxies.Chinese Journal of Astronomy and Astrophysics,6(6),669.
MLA Zhongmu Li,et al."A Study of Binary Stellar Population Synthesis of Elliptical Galaxies".Chinese Journal of Astronomy and Astrophysics 6.6(2006):669.

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来源:国家天文台

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