Variable Stars Observed in the Galactic Disk by AST3-1 from Dome A, Antarctica

Variable Stars Observed in the Galactic Disk by AST3-1 from Dome A, Antarctica
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AST3-1 在南极洲 Dome A 观测到的银盘变星

DOI:
10.3847/1538-3881/153/3/104
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发表时间:
2017-01
期刊:
The Astronomical Journal
影响因子:
--
通讯作者:
Linzhi Wang
Linzhi Wang
中科院分区:
其他
文献类型:
--
作者:
Linzhi Wang

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AST3-1是第二代宽视场光学光度望远镜,专门用于南极洲圆顶A的时域天文学。在这里,我们展示了AST3-1对一个银河系盘场的i波段图像调查的结果。基于对92583颗恒星的时间序列测光,在8天的观测中,共探测到i等≤16.5等的变星560颗;其中339个是之前未知的变量。我们初步将这560个变量分为285个食双星(EW, EB和EA), 27个脉动变星(δ Scuti, γ Doradus, δ Cephei变星和RR Lyrae变星),以及248个其他类型的变量(未分类的周期、多周期和非周期变星)。在食双星中,有34个表现出奥康奈尔效应。其中一个非周期变量显示平台光曲线,另一个变量显示峰值亮度后的二次最大值。我们还发现了一个具有RS cvn样光曲线形态的复杂双星系统;这个物体正在使用双子座南望远镜进行光谱跟踪。
AST3-1 is the second-generation wide-field optical photometric telescope dedicated to time-domain astronomy at Dome A, Antarctica. Here, we present the results of an i-band images survey from AST3-1 toward one Galactic disk field. Based on time-series photometry of 92,583 stars, 560 variable stars were detected with i magnitude ≤16.5 mag during eight days of observations; 339 of these are previously unknown variables. We tentatively classify the 560 variables as 285 eclipsing binaries (EW, EB, and EA), 27 pulsating variable stars (δ Scuti, γ Doradus, δ Cephei variable, and RR Lyrae stars), and 248 other types of variables (unclassified periodic, multiperiodic, and aperiodic variable stars). Of the eclipsing binaries, 34 show O’Connell effects. One of the aperiodic variables shows a plateau light curve and another variable shows a secondary maximum after peak brightness. We also detected a complex binary system with an RS CVn-like light-curve morphology; this object is being followed-up spectroscopically using the Gemini South telescope.
南极洲 DOME A 的 i-BAND 天空亮度和透明度
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发表时间: 2010-08
影响因子: 5.3
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发表时间: 2005-04
期刊: The Astrophysical Journal
影响因子: --
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DOI: 10.3847/0067-0049/226/2/21
发表时间: 2016-10
期刊: The Astrophysical Journal Supplement Series
影响因子: --
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