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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.
Source PublicationPUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA
2009
Volume26Issue:1Pages:7-10
DOI10.1071/AS08009
Contribution Rank第1完成单位
Indexed BySCI
KeywordStars: Binaries: Close Stars: Binaries: Eclipsing Stars: Individual (Ny Lyrae)
AbstractOrbital-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.
Funding OrganizationYunnan Natural Science Foundation [2005A0059M] ; Chinese Natural Science Foundation [10573032, 10573013, 10433030] ; Ministry of Science and Technology of the People's Republic of China [2007CB815406]
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN1323-3580
URL查看原文
Archive Date2009-05-21
WOS IDWOS:000264762200002
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordTHERMAL RELAXATION OSCILLATION ; MASS-RATIO ; CANCRI ; DEEP
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5829
Collection双星与变星研究组
Corresponding AuthorQian, SB (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.United Laboratory of Optical Astronomy, Chinese Academy of Sciences, 100012 Beijing, P.R. China
3.Graduate School of the CAS, Beijing, P.R. China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
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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