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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.
发表期刊ASTRONOMICAL JOURNAL
2008-07
卷号136期号:1页码:337-343
DOI10.1088/0004-6256/136/1/337
产权排序第1完成单位
收录类别SCI
关键词Binaries : Close Binaries : Eclipsing Stars : Evolution Stars : Individual (As Serpentis)
摘要The 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.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6256
URL查看原文
归档日期2008-06-16
WOS记录号WOS:000257290200027
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]ORBITAL PERIOD MODULATION ; URSAE MAJORIS SYSTEMS ; CLOSE BINARIES ; LIGHT-CURVE ; STAR LIGHT ; ADDITIONAL COMPONENTS ; ANDROMEDAE ; EVOLUTION ; DRACONIS ; AURIGAE
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5811
专题双星与变星研究组
通讯作者Zhu, LY (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, 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
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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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