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The first multi-color photometric study of the near-contact binary as serpentis
Zhu LY(朱俐颖)1,2; Qian SB(钱声帮)1,2; Yang, YG3; Zhu, LY (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
Source PublicationASTRONOMICAL JOURNAL
2008-07
Volume136Issue:1Pages:337-343
DOI10.1088/0004-6256/136/1/337
Contribution Rank第1完成单位
Indexed BySCI
KeywordBinaries : Close Binaries : Eclipsing Stars : Evolution Stars : Individual (As Serpentis)
AbstractThe first complete multi-color CCD photometric light curves of the eclipsing binary AS Ser were obtained over three nights in 2005. Using the latest Wilson-Devinney (WD) code, we computed the photometric elements of this system. It turns out that AS Ser is a near-contact binary system with both components filling more than 99% of their Roche lobes. It belongs to a marginal contact binary system within the parameter uncertainties. The marginal characteristic of AS Ser reveals that this target may be in a rare phase predicted by the thermal relaxation oscillation (TRO) theory. The asymmetry of the light curves can be explained by a dark spot on the secondary component, which is consistent with its late-type nature. Combining all available times of light minimum, we derived a new orbital period of AS Ser and found a periodic oscillation varying within an amplitude of 0.0049 days and a period of 11.8 years. This period change may be the result of the light-time effect due to a presumed tertiary component (M-3 > 0.28M circle dot) or might result from magnetic activity cycles of the two components.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-6256
URL查看原文
Archive Date2008-06-16
WOS IDWOS:000257290200027
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordORBITAL PERIOD MODULATION ; URSAE MAJORIS SYSTEMS ; CLOSE BINARIES ; LIGHT-CURVE ; STAR LIGHT ; ADDITIONAL COMPONENTS ; ANDROMEDAE ; EVOLUTION ; DRACONIS ; AURIGAE
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Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5811
Collection双星与变星研究组
Corresponding AuthorZhu, LY (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, China
2.United Laboratory of Optical Astronomy, Chinese Academy of Sciences (ULOAC), 100012 Beijing, China
3.Department of Physics, Huaibei Coal Industry Teachers College, 235000 Huaibei, Anhui, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhu LY,Qian SB,Yang, YG,et al. The first multi-color photometric study of the near-contact binary as serpentis[J]. ASTRONOMICAL JOURNAL,2008,136(1):337-343.
APA Zhu LY,Qian SB,Yang, YG,&Zhu, LY .(2008).The first multi-color photometric study of the near-contact binary as serpentis.ASTRONOMICAL JOURNAL,136(1),337-343.
MLA Zhu LY,et al."The first multi-color photometric study of the near-contact binary as serpentis".ASTRONOMICAL JOURNAL 136.1(2008):337-343.
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