Exoplanets in the Antarctic Sky. III. Stellar Flares Found by AST3-II (CHESPA) within the Southern CVZ of TESS

Liang, En-Si and Zhang, Hui and Yu, Zhouyi and Yang, Ming and Zhou, Ji-lin and Ashley, Michael C. B. and Cui, Xiangqun and Du, Fujia and Fu, Jianning and Gong, Xuefei and Gu, Bozhong and Hu, Lei 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 Sun, Tianrui 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, Shihai and Yu, Ce and Yuan, Xiangyan and Zheng, Jessica and Zhou, Hongyan and Zhu, Zhenxi (2020) Exoplanets in the Antarctic Sky. III. Stellar Flares Found by AST3-II (CHESPA) within the Southern CVZ of TESS. The Astronomical Journal, 159 (5):201. pp. 1-12. ISSN 0004-6256


Abstract

The CHinense Exoplanet Searching Program from Antarctica is a ground-based wide-field photometric survey using the AST3 and CSTAR telescopes located at Dome A, Antarctica. Blessed with the unparalleled observing conditions on the highest point of the Antarctic plateau, three remotely controlled, fully automatic telescopes (AST3-I, AST3-II, and CSTAR-II) carried out continuous high-precision photometric surveys through the polar nights of 2016 and 2017. During the observing seasons of 2016, a total of 26,578 light curves were obtained for stars within the area of the southern continuous viewing zone of TESS, covering an i-band magnitude range from 7.5 to 15. At m i = 10, photometric precision reaches ~2 mmag, allowing possible discoveries of sub-Jupiter-size exoplanets. Here we report 20 stellar flares with i-band energies larger than 1034 erg detected in the 2016 data set of AST3-II, all from different sources. We model the stellar flares and calculate the durations, amplitudes, energies, and skewnesses. The flare properties and the stellar properties of their sources are presented in this work.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Sciences (6 Sep 2019 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Astrophysics (1 Aug 2018 -)
Date Deposited: 08 Feb 2021 06:32
Last Modified: 10 Feb 2021 05:38
Uncontrolled Keywords: Stellar flares; Photometry; Astrostatistics Stellar activity; Astronomy data analysis; Surveys
Fields of Research (2008): 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
Fields of Research (2020): 51 PHYSICAL SCIENCES > 5101 Astronomical sciences > 510109 Stellar astronomy and planetary systems
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Socio-Economic Objectives (2020): 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280120 Expanding knowledge in the physical sciences
Identification Number or DOI: https://doi.org/10.3847/1538-3881/ab7ea8
URI: http://eprints.usq.edu.au/id/eprint/41141

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