Exoplanets in the Antarctic Sky. I. The First Data Release of AST3-II (CHESPA) and New Found Variables within the Southern CVZ of TESS

doi:10.3847/1538-4365/aaec0c

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	Exoplanets in the Antarctic Sky. I. The First Data Release of AST3-II (CHESPA) and New Found Variables within the Southern CVZ of TESS
	Zhang,Hui 1; Yu,Zhouyi 1; Liang,Ensi 1; Yang,Ming 1; Ashley,Michael C. B.2; Cui,Xiangqun 3,4; Du,Fujia 3,4; Fu,Jianning 5; Gong,Xuefei 3,4; Gu,Bozhong 3,4
刊名	The Astrophysical Journal Supplement Series
	2019-01-22
卷号	240 期号:2
关键词	binaries: eclipsing catalogs planets and satellites: detection stars: variables: general surveys techniques: photometric
ISSN号	0067-0049
DOI	10.3847/1538-4365/aaec0c
英文摘要	Abstract Located at Dome A, the highest point of the Antarctic plateau, the Chinese Kunlun station is considered to be one of the best ground-based photometric sites because of its extremely cold, dry, and stable atmosphere. A target can be monitored from there for over 40 days without diurnal interruption during a polar winter. This makes Kunlun station a perfect site to search for short-period transiting exoplanets. Since 2008, an observatory has existed at Kunlun station, and three telescopes are working there. Using these telescopes, the AST3 project has been carried out over the last 6 yr with a search for transiting exoplanets as one of its key programs (CHESPA). In the austral winters of 2016 and 2017, a set of target fields in the southern continuous viewing zone (CVZ) of TESS were monitored by the AST3-II telescope. In this paper, we introduce the CHESPA and present the first data release containing photometry of 26,578 bright stars ( ). The best photometric precision at the optimum magnitude for the survey is around 2 mmag. To demonstrate the data quality, we also present a catalog of 221 variables with a brightness variation greater than 5 mmag from the 2016 data. Among these variables, 179 are newly identified periodic variables not listed in the AAVSO database (https://www.aavso.org/), and 67 are listed in the Candidate Target List. These variables will require careful attention to avoid false-positive signals when searching for transiting exoplanets. Dozens of new transiting exoplanet candidates will be released in a subsequent paper.
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0067-0049-240-2-AAEC0C
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/24640]
专题	中国科学院国家天文台
作者单位	1.School of Astronomy and Space Science, Key Laboratory of Modern Astronomy and Astrophysics in Ministry of Education, Nanjing University, Nanjing 210023, Jiangsu, People's Republic of China; huizhang@nju.edu.cn, zhoujl@nju.edu.cn 2.School of Physics, University of New South Wales, NSW 2052, Australia 3.Nanjing Institute of Astronomical Optics and Technology, Nanjing 210042, People's Republic of China 4.Chinese Center for Antarctic Astronomy, Nanjing 210008, People's Republic of China 5.Department of Astronomy, Beijing Normal University, Beijing, 100875, People's Republic of China 6.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People's Republic of China 7.Polar Research Institute of China, Shanghai 200136, People's Republic of China 8.Chinese Center for Antarctic Astronomy, 451 Jinqiao Rd., Nanjing 210008, People's Republic of China 9.Australian Astronomical Optics, Macquarie University, NSW 2109, Australia 10.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
推荐引用方式 GB/T 7714	Zhang,Hui,Yu,Zhouyi,Liang,Ensi,et al. Exoplanets in the Antarctic Sky. I. The First Data Release of AST3-II (CHESPA) and New Found Variables within the Southern CVZ of TESS[J]. The Astrophysical Journal Supplement Series,2019,240(2).
APA	Zhang,Hui.,Yu,Zhouyi.,Liang,Ensi.,Yang,Ming.,Ashley,Michael C. B..,...&Zhu,Zhenxi.(2019).Exoplanets in the Antarctic Sky. I. The First Data Release of AST3-II (CHESPA) and New Found Variables within the Southern CVZ of TESS.The Astrophysical Journal Supplement Series,240(2).
MLA	Zhang,Hui,et al."Exoplanets in the Antarctic Sky. I. The First Data Release of AST3-II (CHESPA) and New Found Variables within the Southern CVZ of TESS".The Astrophysical Journal Supplement Series 240.2(2019).