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Orbital Period Changes and Their Explanations in Two Algol Binaries: WY Per and RW Leo
Liao WP(廖文萍)1,2,3; Qian SB(钱声帮)1,2,3; Liao, WP (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
Source PublicationPUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2010
Volume62Issue:4Pages:1109-1116
DOI10.1093/pasj/62.4.1109
Contribution Rank第1完成单位
Indexed BySCI
KeywordStars: Binaries: Close Stars: Binaries: Eclipsing Stars: Multiple Stars: Individuals (Wy Persei Rw Leonis)
AbstractWY Per and RW Leo are two Algol-type binaries. Based on our new CCD observations and the almost century-long historical record of the times of primary eclipses for WY Per and RW Leo, the orbital period changes and their explanations were reanalyzed and rediscussed in detail. It has been found that the orbital period of WY Per shows a cyclic oscillation with a period of P(3) = 71.5 yr and a semiamplitude of A(3) = 0(d).0739. The period variation can be interpreted by the light-travel time effect (LTTE) via the presence of a third body in an eccentric orbit with an eccentricity of e(3) similar or equal to 0.602 in the system. For RW Leo, its orbital period shows complex variations. Two cyclic variations (i.e., P(3) = 77.8 yr and A(3) = 0(d).033, and P(4) = 39.1 yr and A(4) = 0(d).022) were discovered. The cyclic variations of P(3) = 77.8 yr and A(3) = 0(d).033 can be attributed to the LTTE via the presence of a third body in an eccentric orbit with an eccentricity of e(3) similar or equal to 0.732.
Funding OrganizationChinese Natural Science Foundation [10973037, 10903026, 10778718] ; National Key Fundamental Research Project [2007CB815406] ; Yunnan Natural Science Foundation [2008CD157]
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-6264
URL查看原文
Archive Date2010-08-16
WOS IDWOS:000282485100027
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordECLIPSING BINARIES ; CLOSE BINARIES ; RS CVN ; MODULATION ; SYSTEMS ; STARS
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5850
Collection双星与变星研究组
中国科学院天体结构与演化重点实验室
Corresponding AuthorLiao, WP (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
Affiliation1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, P. R. China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences
3.Graduate School of the CAS, 100049, Beijing, P.R. China/Yuquan Road 19#, SijingShan Block, 100049, Beijing City, P. R. China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Liao WP,Qian SB,Liao, WP . Orbital Period Changes and Their Explanations in Two Algol Binaries: WY Per and RW Leo[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2010,62(4):1109-1116.
APA Liao WP,Qian SB,&Liao, WP .(2010).Orbital Period Changes and Their Explanations in Two Algol Binaries: WY Per and RW Leo.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,62(4),1109-1116.
MLA Liao WP,et al."Orbital Period Changes and Their Explanations in Two Algol Binaries: WY Per and RW Leo".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 62.4(2010):1109-1116.
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