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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.
发表期刊PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2010
卷号62期号:4页码:1109-1116
DOI10.1093/pasj/62.4.1109
产权排序第1完成单位
收录类别SCI
关键词Stars: Binaries: Close Stars: Binaries: Eclipsing Stars: Multiple Stars: Individuals (Wy Persei Rw Leonis)
摘要WY 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.
项目资助者Chinese Natural Science Foundation [10973037, 10903026, 10778718] ; National Key Fundamental Research Project [2007CB815406] ; Yunnan Natural Science Foundation [2008CD157]
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6264
URL查看原文
归档日期2010-08-16
WOS记录号WOS:000282485100027
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]ECLIPSING BINARIES ; CLOSE BINARIES ; RS CVN ; MODULATION ; SYSTEMS ; STARS
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5850
专题双星与变星研究组
中国科学院天体结构与演化重点实验室
通讯作者Liao, WP (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
作者单位1.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
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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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