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Complex Period Variations of the Neglected W UMa-type Binary System NY Lyrae
Qian SB(钱声帮)1,2,3; Liu L(刘亮)1,2,3; Zhu LY(朱俐颖)1,2,3; Qian, SB (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 AUSTRALIA
2009
卷号26期号:1页码:7-10
DOI10.1071/AS08009
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: Individual (Ny Lyrae)
摘要Orbital-period variations of the neglected W UMa-type binary star, NY Lyr, were analyzed based on two newly determined eclipse times together with the others compiled from the literature. A cyclic oscillation with a period of 82.1 yr and an amplitude of 0.0247 d was discovered to be superimposed on a continuous period increase (dP/dt = +1.33 x 10(-7) d yr(-1)). After the long-term period increase and the large-amplitude cyclic oscillation were removed from the O-C diagram, the residuals suggest that there is another small-amplitude period oscillation (A(4) = 0.0053 d, P-4 = 19.4 years) in the orbital period changes. As in the cases of AH Cnc and AD Cnc, both the continuous period increase and the two cyclic period oscillations make NY Lyr an interesting system to study in the future. In order to understand the evolutionary state of the binary system, new photometric and spectroscopic observations and a careful investigation on those data are needed.
项目资助者Yunnan Natural Science Foundation [2005A0059M] ; Chinese Natural Science Foundation [10573032, 10573013, 10433030] ; Ministry of Science and Technology of the People's Republic of China [2007CB815406]
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN1323-3580
URL查看原文
归档日期2009-05-21
WOS记录号WOS:000264762200002
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]THERMAL RELAXATION OSCILLATION ; MASS-RATIO ; CANCRI ; DEEP
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被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5829
专题双星与变星研究组
通讯作者Qian, SB (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.United Laboratory of Optical Astronomy, Chinese Academy of Sciences, 100012 Beijing, P.R. China
3.Graduate School of the CAS, Beijing, P.R. China
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GB/T 7714
Qian SB,Liu L,Zhu LY,et al. Complex Period Variations of the Neglected W UMa-type Binary System NY Lyrae[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA,2009,26(1):7-10.
APA Qian SB,Liu L,Zhu LY,&Qian, SB .(2009).Complex Period Variations of the Neglected W UMa-type Binary System NY Lyrae.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA,26(1),7-10.
MLA Qian SB,et al."Complex Period Variations of the Neglected W UMa-type Binary System NY Lyrae".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA 26.1(2009):7-10.
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