The short-period limit of contact binaries
文献类型：期刊论文
| 作者 | Jiang DK(姜登凯)1,2 ; Han ZW(韩占文)1,2; Ge HW(葛宏伟)1,2; Yang LH(杨丽恒)1; Li LF(李立芳)1,2
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2012-04 |
| 卷号 | 421期号:4页码:2769-2773 |
| ISSN号 | 0035-8711 |
| 关键词 | instabilities binaries: close binaries: eclipsing stars: evolution stars: formation |
| 通讯作者 | Jiang, DK (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Yunnan Province, Peoples R China. |
| 产权排序 | 第一完成单位 |
| 英文摘要 | The stability of mass transfer is important in the formation of contact binaries from detached binaries when the primaries of the initially detached binaries fill their Roche lobes. Using Eggletons stellar evolution code, we investigate the formation and the short-period limit of contact binaries by considering the effect of the instability of mass transfer. It is found that with decreasing initial primary mass from 0.89 to 0.63 M?, the range of the initial mass ratio decreases for detached binaries that experience stable mass transfer and evolve into contact. If the initial primary mass is less than 0.63 M?, detached binaries would experience dynamically unstable mass transfer when the primaries of detached binaries fill their Roche lobes. These systems would evolve into a common envelope situation and probably then to a complete merger of two components on a quite short time-scale. This results in a low mass limit at about 0.63 M? for the primary mass of contact binaries, which might be the main reason why the period distribution of contact binaries has a short limit of about 0.22 d. By comparing the theoretical period distribution of contact binaries with the observational data, it is found that the observed contact binaries are above the low mass limit for the primary mass of contact binaries and no observed contact binaries are below this limit. This suggests that the short-period limit of contact binaries can be explained by the instability of the mass transfer that occurs when the primaries of the initially detached binaries fill their Roche lobes. |
| 学科主题 | Astronomy & Astrophysics |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | SKY AUTOMATED SURVEY ; ADIABATIC MASS-LOSS ; ECLIPSING BINARY ; STELLAR EVOLUTION ; ABSOLUTE DIMENSIONS ; YY GEMINORUM ; STARS ; SYSTEMS ; COMPONENTS ; MODELS |
| 收录类别 | SCI |
| 原文出处 | http://mnras.oxfordjournals.org/content/421/4/2769 |
| 语种 | 英语 |
| WOS记录号 | WOS:000302620700004 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/4539]  |
| 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, PO Box 110, Kunming, Yunnan Province 650011, China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, PO Box 110, Kunming, Yunnan Province 650011, China |
| 推荐引用方式 GB/T 7714 | Jiang DK,Han ZW,Ge HW,et al. The short-period limit of contact binaries[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2012,421(4):2769-2773. |
| APA | Jiang DK,Han ZW,Ge HW,Yang LH,&Li LF.(2012).The short-period limit of contact binaries.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,421(4),2769-2773. |
| MLA | Jiang DK,et al."The short-period limit of contact binaries".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 421.4(2012):2769-2773. |
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来源：云南天文台
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