Photometric followup investigations on LAMOST survey target Ly And
Lu, Hong-peng1,2; Zhang, Li-yun1,2; Han, Xianming L.1,3; Pi, Qing-feng1,2; Wang, Dai-mei1,2; Lu, HP
发表期刊NEW ASTRONOMY
2017-02-01
卷号51页码:59-64
DOI10.1016/j.newast.2016.08.008
收录类别SCI
关键词Binaries Close - Binaries Eclipsing - Stars Period Variation - Stars Individual Ly And
摘要We present a low-dispersion spectrum and two sets of CCD photometric light curves of the eclipsing binary LY And for the first time. The spectrum of LY And was classified as G2. We derived an updated ephemeris based on all previously available and our newly acquired minimum light times. Our analyses of LY And light curve minimum times reveals that the differences between calculated and observed minimum times for LY And can be represented by an upward parabolic curve, which means its orbital period is increasing with a rate of 1.88 (+/- 0.13) x 10(-7) days/year. This increase in orbital period may be interpreted as mass transfer from the primary component to the secondary component, with a rate of dM1/dt = -4.54 x 10(-8) M-circle dot/year. By analyzing our CCD photometric light curves obtained in 2015, we obtained its photometric solution with the Wilson-Devinney program. This photometric solution also fits very well our light curves obtained in 2014. Our photometric solution shows that LY And is a contact eclipsing binary and its contact factor is f = (17.8 +/- 1.9)%. Furthermore, both our spectroscopic and photometric data show no obvious chromospheric activity of LY And. (C) 2016 Elsevier B.V. All rights reserved.
项目资助者National Development and Reform Commission ; Chinese Academy of Sciences (CAS)(11263001, U1431114, U1631236) ; National Natural Science Foundation of China (NSFC)(U1431114, U1631236) ; NSFC(11263001)
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN1384-1076
URL查看原文
WOS记录号WOS:000385595000009
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]ORBITAL PERIOD MODULATION ; BINARY-STAR LIGHT ; CLOSE BINARIES ; CURVES
引用统计
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9748
专题中国科学院天体结构与演化重点实验室
通讯作者Lu, HP
作者单位1.College of Physics/Department of Physics and Astronomy & NAOC-GZU-Sponsored Center for Astronomy Research, Guizhou University, Guiyang 550025, P.R. China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, P.R. China
3.Dept. of Physics and Astronomy, Butler University, Indianapolis, IN 46208, USA
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Lu, Hong-peng,Zhang, Li-yun,Han, Xianming L.,et al. Photometric followup investigations on LAMOST survey target Ly And[J]. NEW ASTRONOMY,2017,51:59-64.
APA Lu, Hong-peng,Zhang, Li-yun,Han, Xianming L.,Pi, Qing-feng,Wang, Dai-mei,&Lu, HP.(2017).Photometric followup investigations on LAMOST survey target Ly And.NEW ASTRONOMY,51,59-64.
MLA Lu, Hong-peng,et al."Photometric followup investigations on LAMOST survey target Ly And".NEW ASTRONOMY 51(2017):59-64.
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