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Z Draconis with two companions in a 2:1 mean-motion resonance
Yuan, Jin-Zhao1; Senavci, Hakan Volkan2; Qian SB(钱声帮)3; Yuan, JZ (reprint author), Shanxi Normal Univ, Dept Phys, Linfen 041004, Peoples R China
发表期刊RESEARCH IN ASTRONOMY AND ASTROPHYSICS
2016-05-01
卷号16期号:5
DOI10.1088/1674-4527/16/5/081
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.
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Astronomy & Astrophysics
文章类型Article
ISSN1674-4527
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
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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, JZ (reprint author), Shanxi Normal Univ, Dept Phys, Linfen 041004, Peoples R China
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
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Yuan, Jin-Zhao,Senavci, Hakan Volkan,Qian SB,et al. 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,&Yuan, JZ .(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).
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