Z Draconis with two companions in a 2:1 mean-motion resonance | |
Yuan, Jin-Zhao1; Senavci, Hakan Volkan2; Qian SB(钱声帮)3 | |
发表期刊 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS |
2016-05-01 | |
卷号 | 16期号:5 |
DOI | 10.1088/1674-4527/16/5/081 |
产权排序 | 第3完成单位 |
收录类别 | SCI |
关键词 | Binaries: Close Stars: Individual (z Draconis) Methods: Numerical |
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. |
资助项目 | National Natural Science Foundation of China (NSFC)[U1231121] ; Ankara University [BAP][13B4240006] |
项目资助者 | National Natural Science Foundation of China (NSFC)[U1231121] ; Ankara University [BAP][13B4240006] |
语种 | 英语 |
学科领域 | 天文学 ; 恒星与银河系 |
学科门类 | 理学 ; 理学::天文学 |
文章类型 | Article |
出版者 | NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES |
出版地 | 20A DATUN RD, CHAOYANG, BEIJING, 100012, PEOPLES R CHINA 期刊信息 |
ISSN | 1674-4527 |
URL | 查看原文 |
WOS记录号 | WOS:000375793000012 |
WOS研究方向 | Astronomy & Astrophysics |
WOS类目 | Astronomy & Astrophysics |
关键词[WOS] | THERMAL RELAXATION OSCILLATION ; PLANETARY SYSTEM HYPOTHESIS ; BINARIES ; DETECTABILITY |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ynao.ac.cn/handle/114a53/9592 |
专题 | 双星与变星研究组 |
通讯作者 | Yuan, Jin-Zhao |
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). |
条目包含的文件 | ||||||
文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
Z Draconis with two (1400KB) | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论