Exoplanets in the Antarctic Sky. IV. Dual-band Photometry of Variables Found by the CSTAR-II Commissioning Survey at the North Sky
Article
Article Title | Exoplanets in the Antarctic Sky. IV. Dual-band Photometry of Variables Found by the CSTAR-II Commissioning Survey at the North Sky |
---|---|
ERA Journal ID | 1048 |
Article Category | Article |
Authors | Zhu, Jiapeng, Zhang, Hui, Liang, En-Si, Yu, Zhouyi, Yang, Ming, Zhou, Ji-lin, Cui, Xiangqun, Du, Fujia, Gong, Xuefei, Gu, Bozhong, Hu, Lei, Jiang, Peng, Liu, Huigen, Li, Xiaoyan, Li, Zhengyang, Mould, Jeremy, Sun, Tianrui, Suntzeff, Nicholas B., Tao, Charling, Tian, Qiguo, Uddin, Syed A., Wang, Lifan, Wang, Songhu, Wang, Xiaofeng, Wei, Peng, Wright, Duncan, Wittenmyer, Robert A., Xu, Lingzhe, Yang, Shihai, Yuan, Xiangyan, Zhou, Hongyan, Zhu, Zhenxi and Lu, Hongke |
Journal Title | The Astronomical Journal |
Journal Citation | 159 (4) |
Article Number | 172 |
Number of Pages | 18 |
Year | Apr 2020 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-6256 |
1538-3881 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/1538-3881/ab7449 |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-3881/ab7449 |
Abstract | From the experiences learned in three decades of exoplanet search, wide-field transit surveys have proven to be one of the most effective ways to detect exoplanets. Wide field of view, however, suffers from high false-positive rates caused by blended eclipsing binaries. The chromaticity in eclipse depth is an effective feature to distinguish low-depth eclipsing binaries from transiting exoplanets, making multiple-band photometry follow-up advantageous before a target is passed onto more expensive spectroscopic follow-up. Moreover, a multiple-band photometric survey is itself a powerful method to find and vet planetary candidates and narrow down the candidate list of high-priority targets. In this work, we report the first results of a dual-band (Sloan-g and -i) wide-field photometry survey - the Chinese Small Telescope ARray II (CSTAR-II), an updated version of the original CSTAR. As a key component of the Chinese Exoplanet Searching Program from Antarctica, CSTAR-II has been tested thoroughly at a remote arctic site near Mohe during the winter of 2014. In total, 13,531 light curves with the best overall photometric precision of ∼3 mmag were extracted from 7721 stars in the Sloan-g and -i bands. Using a robust method, we have detected 63 variables, of which 48 are newly discovered. The dual-band photometric results as well as the stellar properties of the detected sources are provided in this work. |
Keywords | Eclipsing binary stars; Pulsating variable stars; Surveys; Multi-color photometry |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Nanjing University, China |
Nanjing Institute of Astronomical Optics and Technology, China | |
Chinese Center for Antarctic Astronomy, China | |
Purple Mountain Observatory, China | |
Polar Research Institute of China, China | |
Swinburne University of Technology | |
ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions, Australia | |
Texas A&M University, United States | |
Tsinghua University, China | |
Aix-Marseille University, France | |
Carnegie Institution for Science, United States | |
Yale University, United States | |
Centre for Astrophysics | |
Beijing National Day School, China |
https://research.usq.edu.au/item/y3wq6/exoplanets-in-the-antarctic-sky-iv-dual-band-photometry-of-variables-found-by-the-cstar-ii-commissioning-survey-at-the-north-sky
47
total views0
total downloads1
views this month0
downloads this month