Effects of alpha-enhancement on stellar evolution
文献类型：期刊论文
| 作者 | Guo JP(郭建坡)1,2 ; Zhang FH(张奉辉)1; Chen XF(陈雪飞)1; Han ZW(韩占文)1
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| 刊名 | CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
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| 出版日期 | 2008-06 |
| 卷号 | 8期号:3页码:262-268 |
| 关键词 | abundances stars : evolution stars : general |
| ISSN号 | 1009-9271 |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Guo, JP (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China. |
| 英文摘要 | Using Eggleton's code, we systematically show the differences in stellar evolution between the results based on the scaled-solar mixture and the a-enhanced metal mixture. As input, the OPAL high temperature opacities are used for log(T/K) > 4.00, and the new Wichita State low temperature opacities, for log(T/K) <= 4.00. Our calculations cover star masses ranging from 0.25 to 80.0 M(circle dot), spaced at Delta log M = 0.10 or 0.05. The values of metallicities Z are 0.0001, 0.0003, 0.001, 0.004, 0.01, 0.02, 0.03, 0.04, 0.06, 0.08 and 0.10. For a given Z, the initial hydrogen mass fraction is given by X = 0.76 - 3.0Z. We show that alpha-enhancement can raise the stellar effective temperature and luminosity, and reduce the evolutionary age. Compared with some previous work, the effects of alpha-enhancement are more obviously demonstrated in our calculations. |
| 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] | ELLIPTIC GALAXIES ; GLOBULAR-CLUSTERS ; POPULATION SYNTHESIS ; BRANCH STARS ; MODELS ; ISOCHRONES ; OPACITIES ; ABUNDANCE ; TRACKS ; CONSTRAINTS |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/1009-9271/8/3/03/ |
| 语种 | 英语 |
| WOS记录号 | WOS:000257222800003 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/4456]  |
| 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, Chinese Academy of Sciences, Kunming 650011, China 2.Graduate School of Chinese Academy of Sciences, Beijing 100049, China |
| 推荐引用方式 GB/T 7714 | Guo JP,Zhang FH,Chen XF,et al. Effects of alpha-enhancement on stellar evolution[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2008,8(3):262-268. |
| APA | Guo JP,Zhang FH,Chen XF,&Han ZW.(2008).Effects of alpha-enhancement on stellar evolution.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,8(3),262-268. |
| MLA | Guo JP,et al."Effects of alpha-enhancement on stellar evolution".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 8.3(2008):262-268. |
入库方式： OAI收割
来源：云南天文台
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