YNAO OpenIR  > 中国科学院天体结构与演化重点实验室
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
Source PublicationNEW ASTRONOMY
2017-02-01
Volume51Pages:59-64
DOI10.1016/j.newast.2016.08.008
Indexed BySCI
KeywordBinaries Close - Binaries Eclipsing - Stars Period Variation - Stars Individual Ly And
Abstract

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.

Funding ProjectNational Development and Reform Commission ; Chinese Academy of Sciences (CAS)[11263001] ; National Development and Reform Commission ; Chinese Academy of Sciences (CAS)[U1431114] ; National Development and Reform Commission ; Chinese Academy of Sciences (CAS)[U1631236] ; National Natural Science Foundation of China (NSFC)[U1431114] ; National Natural Science Foundation of China (NSFC)[U1631236] ; NSFC[11263001]
Funding OrganizationNational Development and Reform Commission ; Chinese Academy of Sciences (CAS)[11263001, U1431114, U1631236] ; National Natural Science Foundation of China (NSFC)[U1431114, U1631236] ; NSFC[11263001]
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星天文学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherELSEVIER SCIENCE BV
Publication PlacePO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
ISSN1384-1076
URL查看原文
WOS IDWOS:000385595000009
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordORBITAL PERIOD MODULATION ; BINARY-STAR LIGHT ; CLOSE BINARIES ; CURVES
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9748
Collection中国科学院天体结构与演化重点实验室
Corresponding AuthorLu, Hong-peng
Affiliation1.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
Recommended Citation
GB/T 7714
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.(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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