| How binary interactions affect spectral stellar population synthesis | |
Li ZM(李忠木)1,2 ; Han ZW(韩占文)1; Li, ZM (reprint author), Chinese Acad Sci, Grad Univ, Beijing 100864, Peoples R China.
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| 发表期刊 | ASTROPHYSICAL JOURNAL
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| 2008-09-20 | |
| 卷号 | 685期号:1页码:225-234 |
| DOI | 10.1086/590228 |
| 产权排序 | 第1完成单位 |
| 收录类别 | SCI |
| 关键词 | Galaxies : Stellar Content Galaxies : Elliptical And Lenticular Cd |
| 摘要 | Single-star stellar population (ssSSP) models are usually used for spectral stellar population studies. However, more than 50% of stars are in binaries and evolve differently from single stars. This suggests that the effects of binary interactions should be considered when modeling the stellar populations of galaxies and star clusters. Via a rapid spectral stellar population synthesis model, we give detailed studies of the effects of binary interactions on the Lick indices and colors of stellar populations and on the determination of the stellar ages and metallicities of populations. Our results show that binary interactions make stellar populations less luminous and bluer, with larger age-sensitive Lick indices (H beta) and smaller metallicity-sensitive indices (e. g., Mg b, Fe5270, and Fe5335) compared to ssSSPs. It also shows that when ssSSP models are used to determine the ages and metallicities of stellar populations, smaller ages or metallicities are obtained when using two line indices (H beta and [MgFe]) or two colors (e. g., u - R and R - K), respectively. Some relations for linking the stellar population parameters obtained by ssSSPs to those obtained by binary-star stellar populations (bsSSPs) are presented in this work. This can help us get some absolute values for stellar population parameters and is useful for absolute studies. However, it is found that the relative luminosity-weighted stellar ages and metallicities obtained via ssSSPs and bsSSPs are similar. This suggests that ssSSPs can be used for most spectral stellar population studies, except in some special cases. |
| 项目资助者 | Chinese National Science Foundation(10433030, 10521001 ; 2007CB815406) ; Chinese Academy of Sciences(07ACX51001) |
| 语种 | 英语 |
| 学科领域 | Astronomy & Astrophysics |
| 文章类型 | Article |
| ISSN | 0004-637X |
| URL | 查看原文 |
| 归档日期 | 2008-11-07 |
| WOS记录号 | WOS:000259314200017 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | ABSORPTION-FEATURE INDEXES ; MASS-RATIO DISTRIBUTION ; EARLY-TYPE GALAXIES ; SPECTROSCOPIC BINARIES ; EVOLUTIONARY SYNTHESIS ; OPEN CLUSTERS ; STARS ; RESOLUTION ; MODEL ; METALLICITY |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/4447 |
| 专题 | 大样本恒星演化研究组 |
| 通讯作者 | Li, ZM (reprint author), Chinese Acad Sci, Grad Univ, Beijing 100864, Peoples R China. |
| 作者单位 | 1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China 2.Graduate University of the Chinese Academy of Sciences |
| 第一作者单位 | 中国科学院云南天文台 |
| 推荐引用方式 GB/T 7714 | Li ZM,Han ZW,Li, ZM . How binary interactions affect spectral stellar population synthesis[J]. ASTROPHYSICAL JOURNAL,2008,685(1):225-234. |
| APA | Li ZM,Han ZW,&Li, ZM .(2008).How binary interactions affect spectral stellar population synthesis.ASTROPHYSICAL JOURNAL,685(1),225-234. |
| MLA | Li ZM,et al."How binary interactions affect spectral stellar population synthesis".ASTROPHYSICAL JOURNAL 685.1(2008):225-234. |
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| How Binary Interacti（1273KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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