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题名: ECLIPSING BINARIES FROM THE CSTAR PROJECT AT DOME A, ANTARCTICA
作者: Yang, Ming1; Zhang, Hui1, 2; Wang, Songhu1; Zhou, Ji-Lin1, 2; Zhou, Xu3, 4; Wang, Lingzhi3; Wang LiFan(王力帆)5; Wittenmyer, R. A.6; Liu, Hui-Gen1; Meng, Zeyang1; Ashley, M. C. B.6; Storey, J. W. V.6; Bayliss, D.7; Tinney, Chris6; Wang Ying(王英)1; Wu, Donghong1; Liang, Ensi1; Yu, Zhouyi1; Fan, Zhou3, 4; Feng LongLong(冯珑珑); Gong, Xuefei8; Lawrence, J. S.6, 9; Liu, Qiang3; Luong-Van, D. M.9; Ma, Jun3, 4; Wu, Zhenyu3, 4; Yan, Jun3; Yang, Huigen10; Yang Ji(杨戟)5; Yuan, Xiangyan8; Zhang, Tianmeng3, 4; Zhu ZhenXi(朱镇熹)5; Zou, Hu3, 4
刊名: ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
出版日期: 2015-04-01
卷号: 217, 期号:2, 页码:28
关键词: binaries: eclipsing ; catalogs ; methods: data analysis ; site testing ; stars: statistics ; techniques: photometric
学科分类: 天文和天体物理
DOI: 10.1088/0067-0049/217/2/28
文章类型: Article
英文摘要: The Chinese Small Telescope ARray (CSTAR) has observed an area around the Celestial South Pole at Dome A since 2008. About 20,000 light curves in the i band were obtained during the observation season lasting from 2008 March to July. The photometric precision achieves about 4 mmag at i = 7.5 and 20 mmag at i = 12 within a 30 s exposure time. These light curves are analyzed using Lomb-Scargle, Phase Dispersion Minimization, and Box Least Squares methods to search for periodic signals. False positives may appear as a variable signature caused by contaminating stars and the observation mode of CSTAR. Therefore, the period and position of each variable candidate are checked to eliminate false positives. Eclipsing binaries are removed by visual inspection, frequency spectrum analysis, and a locally linear embedding technique. We identify 53 eclipsing binaries in the field of view of CSTAR, containing 24 detached binaries, 8 semi-detached binaries, 18 contact binaries, and 3 ellipsoidal variables. To derive the parameters of these binaries, we use the Eclipsing Binaries via Artificial Intelligence method. The primary and secondary eclipse timing variations (ETVs) for semi-detached and contact systems are analyzed. Correlated primary and secondary ETVs confirmed by false alarm tests may indicate an unseen perturbing companion. Through ETV analysis, we identify two triple systems (CSTAR J084612.64-883342.9 and CSTAR J220502.55-895206.7). The orbital parameters of the third body in CSTAR J220502.55-895206.7 are derived using a simple dynamical model.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: TRANSIT TIMING VARIATIONS ; SKY AUTOMATED SURVEY ; VARIABLE-STARS ; LIGHT CURVES ; CIRCUMBINARY PLANET ; CONTACT BINARY ; CLOSE BINARIES ; DATA RELEASE ; SPACED DATA ; KEPLER
收录类别: SCI
所属项目名称: PMO_LIB-IR
语种: 英语
WOS记录号: WOS:000353545100009
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/14888
Appears in Collections:南极天文中心_期刊论文

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作者单位: 1.Nanjing Univ, Sch Astron & Space Sci, Key Lab Modern Astron & Astrophys, Nanjing 210046, Jiangsu, Peoples R China
2.Collaborat Innovat Ctr Modern Astron & Space Expl, Nanjing 210046, Jiangsu, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
4.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China
5.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
6.Univ New S Wales, Sch Phys, Sydney, NSW 2052, Australia
7.Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 2611, Australia
8.Nanjing Inst Astron Opt & Technol, Nanjing 210042, Jiangsu, Peoples R China
9.Australian Astron Observ, Sydney, NSW 1710, Australia
10.Polar Res Inst China, Shanghai 200136, Peoples R China
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