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A Study of Binary Stellar Population Synthesis of Elliptical Galaxies
Zhongmu Li; Fenghui Zhang; Zhanwen Han
2006
Source PublicationChinese Journal of Astronomy and Astrophysics
ISSN1009-9271
Volume6Issue:6Pages:669
AbstractWe 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.
Language英语
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/52329
Collection中国科学院国家天文台
Affiliation中国科学院国家天文台
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
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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