Binary Evolutionary Models
文献类型：会议论文
| 作者 | Han ZW(韩占文); Podsiadlowski, Ph.; Han ZW(韩占文)
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| 出版日期 | 2008 |
| 会议名称 | 252nd Symposium of the International-Astronomical-Union |
| 会议日期 | 2008-04-06 |
| 会议地点 | Sanya, PEOPLES R CHINA |
| 关键词 | binaries: close galaxies: elliptical and lenticular cD stars: evolution subdwaxfs supernovae: general white dwarfs ultraviolet: galaxies |
| 卷号 | 4 |
| 期号 | 252 |
| 页码 | 349-357 |
| 通讯作者 | Han, Z (reprint author), Natl Astron Observ, Yunnan Observ, Kunming 65011, Peoples R China. |
| 英文摘要 | In this talk, we present the general principles of binary evolution and give two examples. The first example is the formation of subdwarf B stars (sdBs) and their application to the long-standing problem of ultraviolet excess (also known as UV-upturn) in elliptical galaxies. The second is for the progenitors of type la supernovae (SNe Ia). We discuss the main binary interactions, i.e., stable Roche lobe overflow (RLOF) and common envelope (CE) evolution, and show evolutionary channels leading to the formation of various binary-related objects. In the first example, we show that, the binary model of sdB stars of Hall et al. (2002, 2003) can reproduce field sdB stars and their counterparts, extreme horizontal branch (EHB) stars, in globular clusters. By applying the binary model to the study of evolutionary population synthesis, we have obtained an "a priori" model for the UV-upturn of elliptical galaxies and showed that the UV-upturn is most likely resulted from binary interactions. This has major implications for understanding the evolution of the UV excess and elliptical galaxies ill general. In the second example, we introduce the single degenerate channel and the double degenerate channel for the progenitors of SNe Ia. We give the birth rates and delay time distributions for each channel and the distributions of companion stars at; the moment of SN explosion for the single degenerate channel, which would help to search for the remnant companion stars observationally. |
| 收录类别 | CPCI |
| 产权排序 | 第一完成单位 |
| 会议网址 | http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=2451996&fileId=S1743921308023193 |
| 会议录 | IAU Symposium Proceedings Series - ART OF MODELLING STARS IN THE 21ST CENTURY
 |
| 会议录出版者 | CAMBRIDGE UNIV PRESS |
| 学科主题 | Astronomy & Astrophysics |
| 会议录出版地 | THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE CB2 1RP, CAMBS, ENGLAND |
| 语种 | 英语 |
| ISSN号 | 1743-9213 |
| ISBN号 | 978-0-521-88983-4 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/237]  |
| 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, Ph.,Han ZW. Binary Evolutionary Models[C]. 见:252nd Symposium of the International-Astronomical-Union. Sanya, PEOPLES R CHINA. 2008-04-06.http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=2451996&fileId=S1743921308023193. |
入库方式： OAI收割
来源：云南天文台
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