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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
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
2016-05-01
Volume16Issue:5
DOI10.1088/1674-4527/16/5/081
Contribution Rank第3完成单位
Indexed BySCI
KeywordBinaries: Close Stars: Individual (z Draconis) Methods: Numerical
Abstract

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.

Funding ProjectNational Natural Science Foundation of China (NSFC)[U1231121] ; Ankara University [BAP][13B4240006]
Funding OrganizationNational Natural Science Foundation of China (NSFC)[U1231121] ; Ankara University [BAP][13B4240006]
Language英语
Subject Area天文学 ; 恒星与银河系
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherNATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
Publication Place20A DATUN RD, CHAOYANG, BEIJING, 100012, PEOPLES R CHINA 期刊信息
ISSN1674-4527
URL查看原文
WOS IDWOS:000375793000012
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordTHERMAL RELAXATION OSCILLATION ; PLANETARY SYSTEM HYPOTHESIS ; BINARIES ; DETECTABILITY
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9592
Collection双星与变星研究组
Corresponding AuthorYuan, Jin-Zhao
Affiliation1.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
Recommended Citation
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).
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