S
Sang-Mok Cha
Researcher at Korea Astronomy and Space Science Institute
Publications - 125
Citations - 1297
Sang-Mok Cha is an academic researcher from Korea Astronomy and Space Science Institute. The author has contributed to research in topics: Gravitational microlensing & Light curve. The author has an hindex of 15, co-authored 125 publications receiving 1005 citations. Previous affiliations of Sang-Mok Cha include Max Planck Society & Kyung Hee University.
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Journal ArticleDOI
Kmtnet: a network of 1.6 m wide-field optical telescopes installed at three southern observatories
Seung-Lee Kim,Chung-Uk Lee,Byeong-Gon Park,Dong-Jin Kim,Sang-Mok Cha,Yongseok Lee,Cheongho Han,Moo-Young Chun,In-Soo Yuk +8 more
TL;DR: The Korea Microlensing Telescope Network (KMTNet) as mentioned in this paper is a wide-field photometric system installed by the Korea Astronomy and Space Science Institute (KASI).
Journal ArticleDOI
Multi-color Near Infra-red Intra-day and Short Term Variability of the Blazar S5 0716+714
Alok C. Gupta,Sang-Mok Cha,Sungho Lee,Ho Jin,Soojong Pak,Seoung-hyun Cho,Bongkon Moon,Youngsik Park,In-Soo Yuk,Uk-Won Nam,Jaemann Kyeong +10 more
TL;DR: In this article, the authors reported results of their near-infrared (NIR) photometric variability studies of the BL Lacertae object S5 0716+714.
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KMT-2017-BLG-0165Lb: A Super-Neptune mass planet Orbiting a Sun-like Host Star
Youn Kil Jung,Andrew Gould,Weicheng Zang,Kyu-Ha Hwang,Yoon-Hyun Ryu,Cheongho Han,Jennifer C. Yee,Michael D. Albrow,Sun-Ju Chung,In-Gu Shin,Yossi Shvartzvald,Wei Zhu,Sang-Mok Cha,Dong-Jin Kim,Hyoun-Woo Kim,Seung-Lee Kim,Chung-Uk Lee,Dong-Joo Lee,Yongseok Lee,Byeong-Gon Park,Richard W. Pogge,Matthew T. Penny,Shude Mao,Pascal Fouqué,Tianshu Wang +24 more
TL;DR: In this article, the authors reported the discovery of a low mass-ratio planet with a ratio 25 times higher than the Neptune/Sun ratio, which was discovered from the analysis of the KMT-2017-BLG-0165 microlensing event.
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OGLE-2017-BLG-1434Lb: Eighth q<1×10-4 Mass-Ratio Microlens Planet Confirms Turnover in Planet Mass-Ratio Function
Andrzej Udalski,Yoon-Hyun Ryu,Sedighe Sajadian,Andrew Gould,Andrew Gould,Andrew Gould,Przemek Mróz,Radek Poleski,Radek Poleski,Michał K. Szymański,Jan Skowron,Igor Soszyński,S. Kozłowski,Paweł Pietrukowicz,Krzysztof Ulaczyk,Michał Pawlak,Krzysztof A. Rybicki,Patryk Iwanek,Michael D. Albrow,S. J. Chung,Cheongho Han,Kyu-Ha Hwang,Youn Kil Jung,In-Gu Shin,Yossi Shvartzvald,Jennifer C. Yee,Weicheng Zang,Weicheng Zang,Wei Zhu,Sang-Mok Cha,Sang-Mok Cha,Dong-Jin Kim,Hyo-Ryoung Kim,Shinyoung Kim,C.-U. Lee,D. J. Lee,Yongseok Lee,Yongseok Lee,Byeong-Gon Park,Richard W. Pogge,Valerio Bozza,Martin Dominik,Christiane Helling,M. Hundertmark,U. G. Jørgensen,Penélope Longa-Peña,Stephen C. Lowry,Martin Burgdorf,J. Campbell-White,Simona Ciceri,Daniel F. Evans,R. Figuera Jaimes,Yuri I. Fujii,Yuri I. Fujii,Lauri K. Haikala,Thomas Henning,Tobias C. Hinse,Luigi Mancini,Luigi Mancini,Nuno Peixinho,Nuno Peixinho,Sohrab Rahvar,Markus Rabus,Jesper Skottfelt,Colin Snodgrass,John Southworth,C. von Essen +66 more
TL;DR: The OGLE-2017-BLG-1434Lb is the only known super-Earth with a mass ratio q ≥ 1×10-4 as mentioned in this paper, which is the smallest mass ratio known.
Journal ArticleDOI
A Free-floating or Wide-orbit Planet in the Microlensing Event OGLE-2019-BLG-0551
Przemek Mróz,Radosław Poleski,Cheongho Han,Andrzej Udalski,Andrew Gould,Michał K. Szymański,Igor Soszyński,Paweł Pietrukowicz,Szymon Kozłowski,Jan Skowron,Krzysztof Ulaczyk,Mariusz Gromadzki,Krzysztof A. Rybicki,Patryk Iwanek,M. Wrona,Michael D. Albrow,Sun-Ju Chung,Kyu-Ha Hwang,Yoon-Hyun Ryu,Youn Kil Jung,In-Gu Shin,Yossi Shvartzvald,Jennifer C. Yee,Weicheng Zang,Sang-Mok Cha,Dong-Jin Kim,Hyoun-Woo Kim,Seung-Lee Kim,Chung-Uk Lee,Dong-Joo Lee,Yongseok Lee,Byeong-Gon Park,Richard W. Pogge +32 more
TL;DR: In this article, the authors reported the discovery of another strong free-floating planet candidate, which was found from the analysis of the OGLE-2019-BLG-0551 microlensing event.