Z Draconis with two companions in a 2:1 mean-motion resonance
文献类型：期刊论文
| 作者 | Yuan, Jin-Zhao1 ; Senavci, Hakan Volkan2; Qian SB(钱声帮)3
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| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
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| 出版日期 | 2016-05-01 |
| 卷号 | 16期号:5 |
| 关键词 | binaries: close stars: individual (Z Draconis) methods: numerical |
| ISSN号 | 1674-4527 |
| 产权排序 | 第三完成单位 |
| 通讯作者 | Yuan, JZ (reprint author), Shanxi Normal Univ, Dept Phys, Linfen 041004, Peoples R China |
| 英文摘要 | All available mid-eclipse times of the eclipsing binary Z Draconis are analyzed, and three sets of cyclic variations with periods of 20.1, 29.96 and 59.88 yr are found. The low-amplitude variations with a period of 20.1 yr may be attributed to the unavoidable slight imperfection in the double-Keplerian model, which gives periods of 29.96 and 59.88 yr. Interestingly, the Z Draconis system is close to a 2: 1 mean-motion resonance, or a 6: 3: 2 mean-motion resonance if the 20.1 yr period really exists. We also find that the best solutions tend to give the minimum eccentricities. Based on Kepler's third law, the outermost companion has a minimum mass of similar to 0.77 M-circle dot, whereas the middle companion is an M dwarf star with a mass of similar to 0.40 M-circle dot, suggesting that Z Draconis is a general N-body system. |
| 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] | THERMAL RELAXATION OSCILLATION ; PLANETARY SYSTEM HYPOTHESIS ; BINARIES ; DETECTABILITY |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/article/10.1088/1674-4527/16/5/081/meta |
| 语种 | 英语 |
| WOS记录号 | WOS:000375793000012 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/9592]  |
| 专题 | 云南天文台_双星与变星研究组 |
| 作者单位 | 1.Department of Physics, Shanxi Normal University, Linfen 041004, China 2.Department of Astronomy and Space Sciences, Ankara University, Faculty of Science, TR-06100 Tandoǧan-Ankara, Turkey 3.Yunnan Observatories, Chinese Academy of Sciences, 650011 Kunming, China |
| 推荐引用方式 GB/T 7714 | Yuan, Jin-Zhao,Senavci, Hakan Volkan,Qian SB. Z Draconis with two companions in a 2:1 mean-motion resonance[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2016,16(5). |
| APA | Yuan, Jin-Zhao,Senavci, Hakan Volkan,&Qian SB.(2016).Z Draconis with two companions in a 2:1 mean-motion resonance.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,16(5). |
| MLA | Yuan, Jin-Zhao,et al."Z Draconis with two companions in a 2:1 mean-motion resonance".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 16.5(2016). |
入库方式： OAI收割
来源：云南天文台
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