The formation of hot subdwarf stars and its implications for the UV-upturn phenomenon of elliptical galaxies
文献类型：期刊论文
| 作者 | Han ZW(韩占文)1,2 ; Podsiadlowski, P3; Lynas-Gray, A3
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| 刊名 | ASTROPHYSICS AND SPACE SCIENCE
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| 出版日期 | 2010-10 |
| 卷号 | 329期号:1-2页码:41-48 |
| 关键词 | Stars: subdwarfs Stars: horizontal branch Binaries: close Globular cluster: general Galaxies: elliptical and lenticular cD Galaxies: starburst Ultraviolet: galaxies |
| ISSN号 | 0004-640X |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Han, Z (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China. |
| 英文摘要 | In this paper, we review the formation scenario for field hot subdwarf stars and extreme horizontal branch stars in globular clusters and discuss how the scenario helps us to understand the UV-upturn phenomenon of elliptical galaxies. It is widely accepted that field hot subdwarf stars originate from binary evolution via the following three channels, common envelope evolution channel for hot subdwarf binaries with short orbital periods, stable Roche lobe overflow channel for hot subdwarf binaries with long orbital periods, and the double helium white dwarf merger channel for single hot subdwarfs. Such a scenario can also explain the lack of binarity of extreme horizontal branch stars in globular clusters. We have applied, in an a priori way, the scenario to the study of UV-upturn phenomenon of elliptical galaxies via an evolutionary population synthesis approach and found that the UV-upturn can be naturally explained. This has major implications for understanding the evolution of UV-upturn and elliptical galaxies in general. In particular, it implies that the UV-upturn is not a sign of age, as had been postulated previously, and should not be strongly dependent on the metallicity of the population, but exists universally from dwarf ellipticals to giant ellipticals. The above a priori UV-upturn model is supported by recent GALEX observations and has been applied to naturally explain the colours of both dwarf ellipticals and giant ellipticals without the requirement of dichotomy between their stellar population properties. |
| 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] | HORIZONTAL-BRANCH STARS ; FAR-ULTRAVIOLET EMISSION ; STANDARD STELLAR LIBRARY ; B-STARS ; GLOBULAR-CLUSTERS ; EVOLUTIONARY SYNTHESIS ; POPULATION SYNTHESIS ; BINARY FRACTION ; VIRGO CLUSTER ; EHB BINARIES |
| 收录类别 | SCI |
| 原文出处 | http://link.springer.com/article/10.1007%2Fs10509-010-0348-4 |
| 语种 | 英语 |
| WOS记录号 | WOS:000282823200008 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/4487]  |
| 专题 | 云南天文台_大样本恒星演化研究组 云南天文台_中国科学院天体结构与演化重点实验室 |
| 作者单位 | 1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming, 650011, China 2.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, China 3.Department of Physics, University of Oxford, Keble Road, Oxford, OX1 3RH, UK |
| 推荐引用方式 GB/T 7714 | Han ZW,Podsiadlowski, P,Lynas-Gray, A. The formation of hot subdwarf stars and its implications for the UV-upturn phenomenon of elliptical galaxies[J]. ASTROPHYSICS AND SPACE SCIENCE,2010,329(1-2):41-48. |
| APA | Han ZW,Podsiadlowski, P,&Lynas-Gray, A.(2010).The formation of hot subdwarf stars and its implications for the UV-upturn phenomenon of elliptical galaxies.ASTROPHYSICS AND SPACE SCIENCE,329(1-2),41-48. |
| MLA | Han ZW,et al."The formation of hot subdwarf stars and its implications for the UV-upturn phenomenon of elliptical galaxies".ASTROPHYSICS AND SPACE SCIENCE 329.1-2(2010):41-48. |
入库方式： OAI收割
来源：云南天文台
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