Exoplanets in the Antarctic sky. II. 116 transiting exoplanet candidates found by AST3-II (CHESPA) within the southern CVZ of TESS

Zhang, Hui and Yu, Zhouyi and Liang, Ensi and Yang, Ming and Ashley, Michael C. B. and Cui, Xiangqun and Du, Fujia and Fu, Jianning and Gong, Xuefei and Gu, Bozhong and Hu, Yi and Jiang, Peng and Liu, Huigen and Lawrence, Jon and Liu, Qiang and Li, Xiaoyan and Li, Zhengyang and Ma, Bin and Mould, Jeremy and Shang, Zhaohui and Suntzeff, Nicholas B. and Tao, Charling and Tian, Qiguo and Tinney, C. G. and Uddin, Syed A. and Wang, Lifan and Wang, Songhu and Wang, Xiaofeng and Wei, Peng and Wright, Duncan and Wu, Xuefeng and Wittenmyer, Robert A. and Xu, Lingzhe and Yang, Shi-hai and Yu, Ce and Yuan, Xiangyan and Zheng, Jessica and Zhou, Hongyan and Zhou, Ji-lin and Zhu, Zhenxi (2019) Exoplanets in the Antarctic sky. II. 116 transiting exoplanet candidates found by AST3-II (CHESPA) within the southern CVZ of TESS. Astrophysical Journal, Supplement Series, 240 (2 - Article 17). pp. 1-37. ISSN 0067-0049

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Abstract

We report first results from the CHinese Exoplanet Searching Program from Antarctica (CHESPA)-a wide-field high-resolution photometric survey for transiting exoplanets carried out using telescopes of the AST3 (Antarctic Survey Telescopes times 3) project. There are now three telescopes (AST3-I, AST3-II, and CSTAR-II) operating at Dome A-the highest point on the Antarctic Plateau-in a fully automatic and remote mode to exploit the superb observing conditions of the site, and its long and uninterrupted polar nights. The search for transiting exoplanets is one of the key projects for AST3. During the austral winters of 2016 and 2017 we used the AST3-II telescope to survey a set of target fields near the southern ecliptic pole, falling within the continuous viewing zone of the TESS mission. The first data release of the 2016 data, including images, catalogs, and light curves of 26,578 bright stars (7.5 <= m(i) <= 15), was presented in Zhang et al. The best precision, as measured by the rms of the light curves at the optimum magnitude of the survey (m(i) = 10), is around 2 mmag. We detect 222 objects with plausible transit signals from these data, 116 of which are plausible transiting exoplanet candidates according to their stellar properties as given by the TESS Input Catalog, Gaia DR2, and TESS-HERMES spectroscopy. With the first data release from TESS expected in late 2018, this candidate list will be timely for improving the rejection of potential false-positives.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version deposited in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Astrophysics (1 Aug 2018 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Astrophysics (1 Aug 2018 -)
Date Deposited: 09 Sep 2019 04:10
Last Modified: 10 Sep 2019 04:52
Uncontrolled Keywords: binaries eclipsing, catalogs, planets and satellite detection, star variables, general surveys, photometric
Fields of Research : 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
Identification Number or DOI: 10.3847/1538-4365/aaf583
URI: http://eprints.usq.edu.au/id/eprint/36387

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