Testing three derivative methods of stellar population synthesis models
文献类型：期刊论文
| 作者 | Zhang, Yu1,2,3 ; Han, Zhanwen1,3; Liu, Jinzhong4; Zhang, Fenghui1,3; Kang, Xiaoyu1,2,3
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2012-04-01 |
| 卷号 | 421期号:2页码:1678-1696 |
| 关键词 | globular clusters: general galaxies: fundamental parameters galaxies: stellar content |
| ISSN号 | 1678-1696 |
| 通讯作者 | zhy@ynao.ac.cn |
| 英文摘要 | The number of methods used to study the properties of galaxies is increasing, and it is very important to test these methods. Galactic globular clusters (GCs) provide an excellent medium for such tests, because they can be considered as simple stellar populations. We present ages and metallicities for 40 Galactic GCs as determined from three publicly available techniques, namely the colour, Lick-index and spectrum-fitting methods, based on Bruzual & Charlot evolutionary population synthesis (EPS) models. By comparisons with the ages obtained from colour-magnitude diagrams (CMDs) and metallicities obtained from the spectra of stars, we are able to estimate the ability of these methods to determine GC parameters, which is essential. We find that: (i) for the metallicity, our derived metallicities agree with those derived from the spectra of stars - the Lick-index method is suitable for studying metallicity for stellar population systems in the range - 1.5 less than or similar to [Fe/H] less than or similar to -0.7 and the spectrum-fitting method is suitable for studying metallicity for stellar population systems in the range -2.3 less than or similar to [Fe/H] less than or similar to -1.5; (ii) for the age, these three methods have difficulties in age determination - our derived ages are smaller (by about 2.0 Gyr, on average) than the results of CMDs for all three methods. We use Vazdekis and Maraston models to analyse whether our results are dependent on EPS models, and find that the tendency of these two models is the same as that of Bruzual & Charlot models. Our results are independent of the EPS models. In addition, our test is based on old GCs and our conclusions may hold for old stellar population systems. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | 恒星和恒星物理 |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | GALACTIC GLOBULAR-CLUSTERS ; HIGH-SPECTRAL-RESOLUTION ; EARLY-TYPE GALAXIES ; HORIZONTAL-BRANCH STARS ; SPACE-TELESCOPE OBSERVATIONS ; ELEMENT ABUNDANCE RATIOS ; LARGE-MAGELLANIC-CLOUD ; INITIAL MASS FUNCTION ; BLUE STRAGGLER STARS ; SUBDWARF-B-STARS |
| 收录类别 | SCI |
| 资助信息 | Natural Science Foundation (grant nos 10773026, 11033008, 10821061, 2007CB815406 and 11103054); the Chinese Academy of Sciences under grant no. KJCX2-YW-T24; programs ‘Light in China, Western Region’(LCWR) under grant XBBS201022; 'Beyond the Horizons’ und |
| 原文出处 | http://mnras.oxfordjournals.org/ |
| 语种 | 英语 |
| WOS记录号 | WOS:000302695600060 |
| 公开日期 | 2014-12-12 |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/435]  |
| 专题 | 新疆天文台_光学天文与技术应用研究室 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming 650011, Peoples R China 4.Chinese Acad Sci, Natl Astron Observ, Xinjiang Observ, Urumqi 830011, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Yu,Han, Zhanwen,Liu, Jinzhong,et al. Testing three derivative methods of stellar population synthesis models[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2012,421(2):1678-1696. |
| APA | Zhang, Yu,Han, Zhanwen,Liu, Jinzhong,Zhang, Fenghui,&Kang, Xiaoyu.(2012).Testing three derivative methods of stellar population synthesis models.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,421(2),1678-1696. |
| MLA | Zhang, Yu,et al."Testing three derivative methods of stellar population synthesis models".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 421.2(2012):1678-1696. |
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来源：新疆天文台
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