Exoplanets in the Antarctic Sky. IV. Dual-band Photometry of Variables Found by the CSTAR-II Commissioning Survey at the North Sky
International audience 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 ch...
Published in: | The Astronomical Journal |
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Online Access: | https://hal.science/hal-02542900 https://doi.org/10.3847/1538-3881/ab7449 |
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fthalin2p3:oai:HAL:hal-02542900v1 2024-05-12T07:53:32+00:00 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 Centre de Physique des Particules de Marseille (CPPM) Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) 2020 https://hal.science/hal-02542900 https://doi.org/10.3847/1538-3881/ab7449 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.3847/1538-3881/ab7449 hal-02542900 https://hal.science/hal-02542900 doi:10.3847/1538-3881/ab7449 INSPIRE: 1790528 Astron.J. https://hal.science/hal-02542900 Astron.J., 2020, 159 (4), pp.172. ⟨10.3847/1538-3881/ab7449⟩ [PHYS]Physics [physics] info:eu-repo/semantics/article Journal articles 2020 fthalin2p3 https://doi.org/10.3847/1538-3881/ab7449 2024-04-17T15:43:02Z International audience 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 HAL-IN2P3 (Institut national de physique nucléaire et de physique des particules) Antarctic Arctic The Antarctic The Astronomical Journal 159 4 172 |
institution |
Open Polar |
collection |
HAL-IN2P3 (Institut national de physique nucléaire et de physique des particules) |
op_collection_id |
fthalin2p3 |
language |
English |
topic |
[PHYS]Physics [physics] |
spellingShingle |
[PHYS]Physics [physics] 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 |
[PHYS]Physics [physics] |
description |
International audience 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. |
author2 |
Centre de Physique des Particules de Marseille (CPPM) Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) |
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 |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-02542900 https://doi.org/10.3847/1538-3881/ab7449 |
geographic |
Antarctic Arctic The Antarctic |
geographic_facet |
Antarctic Arctic The Antarctic |
genre |
Antarc* Antarctic Antarctica Arctic |
genre_facet |
Antarc* Antarctic Antarctica Arctic |
op_source |
Astron.J. https://hal.science/hal-02542900 Astron.J., 2020, 159 (4), pp.172. ⟨10.3847/1538-3881/ab7449⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3847/1538-3881/ab7449 hal-02542900 https://hal.science/hal-02542900 doi:10.3847/1538-3881/ab7449 INSPIRE: 1790528 |
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_ |
1798843171714629632 |