Exoplanets in the Antarctic Sky. IV. Dual-band Photometry of Variables Found by the CSTAR-II Commissioning Survey at the North Sky
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 d...
Published in: | The Astronomical Journal |
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IOP Publishing
2020
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Online Access: | 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 https://doi.org/10.3847/1538-3881/ab7449 |
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ftusqland:oai:research.usq.edu.au:y3wq6 2023-09-05T13:12:18+02:00 Exoplanets in the Antarctic Sky. IV. Dual-band Photometry of Variables Found by the CSTAR-II Commissioning Survey at the North Sky 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 Lu, Hongke Apr 2020 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 https://doi.org/10.3847/1538-3881/ab7449 unknown IOP Publishing https://doi.org/10.3847/1538-3881/ab7449 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, ., Lu, Hongke. 2020. "Exoplanets in the Antarctic Sky. IV. Dual-band Photometry of Variables Found by the CSTAR-II Commissioning Survey at the North Sky." The Astronomical Journal. 159 (4). https://doi.org/10.3847/1538-3881/ab7449 Eclipsing binary stars Pulsating variable stars Surveys Multi-color photometry article PeerReviewed 2020 ftusqland https://doi.org/10.3847/1538-3881/ab7449 2023-08-21T22:32:39Z 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. Article in Journal/Newspaper Antarc* Antarctic Antarctica Arctic University of Southern Queensland: USQ ePrints Arctic Antarctic The Antarctic The Astronomical Journal 159 4 172 |
institution |
Open Polar |
collection |
University of Southern Queensland: USQ ePrints |
op_collection_id |
ftusqland |
language |
unknown |
topic |
Eclipsing binary stars Pulsating variable stars Surveys Multi-color photometry |
spellingShingle |
Eclipsing binary stars Pulsating variable stars Surveys Multi-color photometry 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 Lu, Hongke Exoplanets in the Antarctic Sky. IV. Dual-band Photometry of Variables Found by the CSTAR-II Commissioning Survey at the North Sky |
topic_facet |
Eclipsing binary stars Pulsating variable stars Surveys Multi-color photometry |
description |
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. |
format |
Article in Journal/Newspaper |
author |
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 Lu, Hongke |
author_facet |
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 Lu, Hongke |
author_sort |
Zhu, Jiapeng |
title |
Exoplanets in the Antarctic Sky. IV. Dual-band Photometry of Variables Found by the CSTAR-II Commissioning Survey at the North Sky |
title_short |
Exoplanets in the Antarctic Sky. IV. Dual-band Photometry of Variables Found by the CSTAR-II Commissioning Survey at the North Sky |
title_full |
Exoplanets in the Antarctic Sky. IV. Dual-band Photometry of Variables Found by the CSTAR-II Commissioning Survey at the North Sky |
title_fullStr |
Exoplanets in the Antarctic Sky. IV. Dual-band Photometry of Variables Found by the CSTAR-II Commissioning Survey at the North Sky |
title_full_unstemmed |
Exoplanets in the Antarctic Sky. IV. Dual-band Photometry of Variables Found by the CSTAR-II Commissioning Survey at the North Sky |
title_sort |
exoplanets in the antarctic sky. iv. dual-band photometry of variables found by the cstar-ii commissioning survey at the north sky |
publisher |
IOP Publishing |
publishDate |
2020 |
url |
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 https://doi.org/10.3847/1538-3881/ab7449 |
geographic |
Arctic Antarctic The Antarctic |
geographic_facet |
Arctic Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica Arctic |
genre_facet |
Antarc* Antarctic Antarctica Arctic |
op_relation |
https://doi.org/10.3847/1538-3881/ab7449 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, ., Lu, Hongke. 2020. "Exoplanets in the Antarctic Sky. IV. Dual-band Photometry of Variables Found by the CSTAR-II Commissioning Survey at the North Sky." The Astronomical Journal. 159 (4). https://doi.org/10.3847/1538-3881/ab7449 |
op_doi |
https://doi.org/10.3847/1538-3881/ab7449 |
container_title |
The Astronomical Journal |
container_volume |
159 |
container_issue |
4 |
container_start_page |
172 |
_version_ |
1776199706231177216 |