| Energy transfer and its effects on the secondaries in W Ursae Majoris type contact binaries | |
Jiang DK(姜登凯)1,2 ; Han ZW(韩占文)1; Jiang TY(姜天雨)1,2; Li LF(李立芳)1; Jiang, DK (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Yunnan Province, Peoples R China.
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| 发表期刊 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 2009-07-11 | |
| 卷号 | 396期号:4页码:2176-2182 |
| DOI | 10.1111/j.1365-2966.2009.14852.x |
| 产权排序 | 第1完成单位 |
| 收录类别 | SCI |
| 关键词 | Binaries: Eclipsing Stars: Evolution Stars: Statistics |
| 摘要 | Based on the physical parameters of 133 W Ursae Majoris (W UMa) type contact binaries, energy transfer and its effects on the secondaries in W UMa contact binaries are investigated. Relations are given between the mass ratio (q) for W UMa contact binaries and the relative energy transfer rates, i.e. U(1), the ratio of the transferred luminosity to the surface luminosity of the primary, and U(2), the ratio of the transferred luminosity to the nuclear luminosity of the secondary. The theoretical curves(U(1) versus q and U(2) versus q) are derived based on various assumptions: that the two components in each W UMa system are nearly identical in effective temperature and just fill their inner Roche lobes, and the primaries are zero-age main-sequence stars. Although these curves can reflect the distribution of U(1) and U(2) versus q, some observational systems deviate significantly from these curves. This results mainly from the difference in effective temperatures of the components of W UMa systems. The radius and the density of the secondary are related to the relative energy transfer rate U(2): the higher U(2), the greater the expansion and the lower the density of the secondary in a W UMa system. In addition, it is found that the temperature difference of W UMa binary components is correlated with the relative energy transfer rate U(1) and decreases with increasing U(1). This might suggest that there is a thermal coupling between the two components in W UMa contact binaries, and that the classification of W UMa contact binaries into A or W types depends on the energy transfer from the primary to the secondary. The temperature difference of W UMa binary components is poorly correlated with the mass of the primary. This suggests that the properties of the common envelope of a W UMa contact binary might not have a significant effect on the energy transfer between the two components. |
| 项目资助者 | Chinese Natural Science Foundation [10673029, 10773026, 10433030, 10521001] ; Yunnan Natural Science Foundation [2007A113M, 2005A0035Q] |
| 语种 | 英语 |
| 学科领域 | Astronomy & Astrophysics |
| 文章类型 | Article |
| ISSN | 0035-8711 |
| URL | 查看原文 |
| 归档日期 | 2009-07-03 |
| WOS记录号 | WOS:000267710400026 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | ECLIPSING BINARIES ; PHYSICAL PARAMETERS ; EVOLUTIONARY STATUS ; STELLAR EVOLUTION ; SYSTEMS ; MASS ; STARS ; COMPONENTS ; BOOTIS |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/4471 |
| 专题 | 大样本恒星演化研究组 |
| 通讯作者 | Jiang, DK (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Yunnan Province, Peoples R China. |
| 作者单位 | 1.National Astronomical Observatories, Yunnan Observatory, Chinese Academy of Sciences, PO Box 110, Kunming, Yunnan Province 650011, China 2.Graduate University of Chinese Academy of Sciences, Beijing 100039, China |
| 第一作者单位 | 中国科学院云南天文台 |
| 推荐引用方式 GB/T 7714 | Jiang DK,Han ZW,Jiang TY,et al. Energy transfer and its effects on the secondaries in W Ursae Majoris type contact binaries[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2009,396(4):2176-2182. |
| APA | Jiang DK,Han ZW,Jiang TY,Li LF,&Jiang, DK .(2009).Energy transfer and its effects on the secondaries in W Ursae Majoris type contact binaries.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,396(4),2176-2182. |
| MLA | Jiang DK,et al."Energy transfer and its effects on the secondaries in W Ursae Majoris type contact binaries".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 396.4(2009):2176-2182. |
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