Binary Stars as the Source of the Far-UV Excess in Elliptical Galaxies
文献类型：会议论文
| 作者 | Han ZW(韩占文); Podsiadlowski, P; Lynas-Gray, AE; Han ZW(韩占文)
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| 出版日期 | 2009 |
| 会议名称 | International Conference on Untraviolet Properties of Evolved Stellar Populations |
| 会议日期 | 2007-04-16 |
| 会议地点 | Puerto Vallarta, MEXICO |
| 页码 | 59-65 |
| 通讯作者 | Han, ZW (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China. |
| 英文摘要 | The discovery of an excess of light in the far-ultraviolet (UV) spectrum in elliptical galaxies was a major surprise in 1969. While it is now clear that this UV excess is caused by an old population of hot helium-burning stars without large hydrogen-rich envelopes rather than young stars, their origin has remained a mystery. Here we show that these stars most likely lost their envelopes because of binary interactions, similar to the hot subdwarf population in our own Galaxy. This has major implications for understanding the evolution of the UV excess and of elliptical galaxies in general. In particular, it implies that the UV excess is not a sign of age, as had been postulated previously, and predicts that it should not be strongly dependent on the metallicity of the population. |
| 收录类别 | CPCI |
| 产权排序 | 第一完成单位 |
| 会议网址 | http://link.springer.com/chapter/10.1007%2F978-0-387-87621-4_8 |
| 会议录 | Astrophysics and Space Science Proceedings - NEW QUESTS IN STELLAR ASTROPHYSICS II
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| 会议录出版者 | SPRINGER |
| 学科主题 | Astronomy & Astrophysics |
| 会议录出版地 | 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES |
| 语种 | 英语 |
| ISSN号 | 1570-6591 |
| ISBN号 | 978-0-387-87620-7 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/245]  |
| 专题 | 云南天文台_大样本恒星演化研究组 |
| 通讯作者 | Han ZW(韩占文) |
| 推荐引用方式 GB/T 7714 | Han ZW,Podsiadlowski, P,Lynas-Gray, AE,et al. Binary Stars as the Source of the Far-UV Excess in Elliptical Galaxies[C]. 见:International Conference on Untraviolet Properties of Evolved Stellar Populations. Puerto Vallarta, MEXICO. 2007-04-16.http://link.springer.com/chapter/10.1007%2F978-0-387-87621-4_8. |
入库方式： OAI收割
来源：云南天文台
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