An isochrone data base and a rapid model for stellar population synthesis
文献类型：期刊论文
| 作者 | Li ZM(李忠木)1,2 ; Han ZW(韩占文)1
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2008-06-11 |
| 卷号 | 387期号:1页码:105-114 |
| 关键词 | galaxies : elliptical and lenticular, cD galaxies : stellar content |
| ISSN号 | 0035-8711 |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Li, ZM (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China. |
| 英文摘要 | We first presented an isochrone data base that can be widely used for stellar population synthesis studies and colour-magnitude diagram (CMD) fitting. The data base consists of the isochrones of both single-star and binary-star simple stellar populations (ss-SSPs and bs-SSPs). The ranges for the age and metallicity of populations are 0-15 Gyr and 0.0001-0.03, respectively. All data are available for populations with two widely used initial mass functions (IMFs), that is, Salpeter IMF and Chabrier IMF. The uncertainty caused by the data base (about 0.81 per cent) is designed to be smaller than those caused by the Hurley code and widely used stellar spectra libraries (e.g. BaSeL 3.1) when it is used for stellar population synthesis. Based on the isochrone data base, we then built a rapid stellar population synthesis (RPS) model and calculated the high-resolution (0.3-angstrom) integrated spectral energy distributions, Lick indices and colour indices for bs-SSPs and ss-SSPs. In particular, we calculated the UBVRIJHKLM colours, ugriz colours and some composite colours that consist of magnitudes on different systems. These colours are useful for disentangling the well-known stellar age-metallicity degeneracy according to our previous work. As an example for applying the isochrone data base for CMD fitting, we fitted the CMDs of two star clusters (M67 and NGC 1868) and obtained their distance moduli, colour excesses, stellar metallicities and ages. The results showed that the isochrones of bs-SSPs are closer to those of real star clusters. It suggests that we should take the effects of binary interactions into account in stellar population synthesis. We also discussed on the limitations of the application of the isochrone data base and the results of the RPS model. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | HIGH-SPECTRAL-RESOLUTION ; MASS-RATIO DISTRIBUTION ; EARLY-TYPE GALAXIES ; ELLIPTIC GALAXIES ; SPECTROSCOPIC BINARIES ; EVOLUTIONARY SYNTHESIS ; OPEN CLUSTERS ; METALLICITY ; LIBRARY ; CALIBRATION |
| 收录类别 | SCI |
| 原文出处 | http://mnras.oxfordjournals.org/content/387/1/105 |
| 语种 | 英语 |
| WOS记录号 | WOS:000256378700010 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/4454]  |
| 专题 | 云南天文台_大样本恒星演化研究组 |
| 作者单位 | 1.National Astronomical Observatories/Yunnan Observatory, The Chinese Academy of Sciences, Kunming 650011, China 2.Graduate University of the Chinese Academy of Sciences, Beijing 100049, China |
| 推荐引用方式 GB/T 7714 | Li ZM,Han ZW. An isochrone data base and a rapid model for stellar population synthesis[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2008,387(1):105-114. |
| APA | Li ZM,&Han ZW.(2008).An isochrone data base and a rapid model for stellar population synthesis.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,387(1),105-114. |
| MLA | Li ZM,et al."An isochrone data base and a rapid model for stellar population synthesis".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 387.1(2008):105-114. |
入库方式： OAI收割
来源：云南天文台
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