K
Kohei Kawasaki
Researcher at Osaka University
Publications - 21
Citations - 291
Kohei Kawasaki is an academic researcher from Osaka University. The author has contributed to research in topics: Gravitational microlensing & Light curve. The author has an hindex of 10, co-authored 21 publications receiving 257 citations.
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Journal ArticleDOI
OGLE-2016-BLG-1190Lb: The First Spitzer Bulge Planet Lies Near the Planet/Brown-dwarf Boundary
Yoon-Hyun Ryu,Jennifer C. Yee,Andrzej Udalski,Ian A. Bond,Yossi Shvartzvald,Weicheng Zang,Weicheng Zang,R. Figuera Jaimes,R. Figuera Jaimes,U. G. Jørgensen,Wei Zhu,Chelsea X. Huang,Chelsea X. Huang,Y. K. Jung,Michael D. Albrow,S. J. Chung,S. J. Chung,Andrew Gould,Andrew Gould,Andrew Gould,Chang S. Han,Kyu-Ha Hwang,I.-G. Shin,Sang-Mok Cha,Sang-Mok Cha,D.-J. Kim,Hyoun-Woo Kim,Shinyoung Kim,Shinyoung Kim,C.-U. Lee,C.-U. Lee,Dong-Joo Lee,Yongseok Lee,Yongseok Lee,Byeong-Gon Park,Byeong-Gon Park,Richard W. Pogge,S. Calchi Novati,S. Calchi Novati,Sean Carey,Calen B. Henderson,C. A. Beichman,B. S. Gaudi,P. Mróz,Radosław Poleski,Radosław Poleski,Jan Skowron,Michał K. Szymański,Igor Soszyński,S. Kozlowski,P. Pietrukowicz,Krzysztof Ulaczyk,M. Pawlak,Fumio Abe,Yuichiro Asakura,Richard K. Barry,David P. Bennett,A. Bhattacharya,Martin Donachie,Phil Evans,Akihiko Fukui,Yuki Hirao,Yoshitaka Itow,Kohei Kawasaki,Naoki Koshimoto,Man Cheung Alex Li,C. H. Ling,Kimiaki Masuda,Yutaka Matsubara,Shota Miyazaki,Yasushi Muraki,Masayuki Nagakane,Kouji Ohnishi,Clément Ranc,Nicholas J. Rattenbury,To. Saito,A. Sharan,Denis J. Sullivan,Takahiro Sumi,Daisuke Suzuki,Daisuke Suzuki,Paul J. Tristram,T. Yamada,Atsunori Yonehara,G. Bryden,Steve B. Howell,Savannah Jacklin,Matthew T. Penny,Shude Mao,Shude Mao,Shude Mao,Pascal Fouqué,Tianshu Wang,Rachel Street,Yiannis Tsapras,M. Hundertmark,M. Hundertmark,Etienne Bachelet,Martin Dominik,Z. Li,Simon Cross,Arnaud Cassan,Keith Horne,R. W. Schmidt,Joachim Wambsganss,S. K. Ment,D. Maoz,Colin Snodgrass,Iain A. Steele,Valerio Bozza,Valerio Bozza,Martin Burgdorf,Simona Ciceri,Giuseppe D'Ago,Daniel F. Evans,Tobias C. Hinse,Eamonn Kerins,Rosita Kokotanekova,Rosita Kokotanekova,P. Longa,J. MacKenzie,A. Popovas,Markus Rabus,Sohrab Rahvar,Sedighe Sajadian,Jesper Skottfelt,John Southworth,C. von Essen +127 more
TL;DR: The OGLE-2016-BLG-1190Lb is the first Spitzer microlensing planet in the Galactic bulge/bar, an assignation that can be confirmed by two epochs of high-resolution imaging of the combined source-lens baseline object as discussed by the authors.
Journal ArticleDOI
An Isolated Microlens Observed from K2, Spitzer, and Earth
Wei Zhu,Wei Zhu,Andrzej Udalski,Chelsea X. Huang,S. Calchi Novati,S. Calchi Novati,Takahiro Sumi,Radosław Poleski,Radosław Poleski,Jan Skowron,P. Mróz,Michał K. Szymański,Igor Soszyński,P. Pietrukowicz,S. Kozlowski,Krzysztof Ulaczyk,Krzysztof Ulaczyk,Michał Pawlak,C. A. Beichman,G. Bryden,Sean Carey,B. S. Gaudi,Andrew Gould,Andrew Gould,Andrew Gould,Calen B. Henderson,Yossi Shvartzvald,Jennifer C. Yee,Spitzer Team,Ian A. Bond,David P. Bennett,Daisuke Suzuki,Nicholas J. Rattenbury,Naoki Koshimoto,Fumio Abe,Yuichiro Asakura,Richard K. Barry,Aparna Bhattacharya,Aparna Bhattacharya,Martin Donachie,Phil Evans,Akihiko Fukui,Yuki Hirao,Yoshitaka Itow,Kohei Kawasaki,Man Cheung Alex Li,C. H. Ling,Kimiaki Masuda,Yutaka Matsubara,Shota Miyazaki,H. Munakata,Yasushi Muraki,Masayuki Nagakane,K. Ohnishi,Clément Ranc,To. Saito,A. Sharan,Denis J. Sullivan,Paul J. Tristram,T. Yamada,Atsunori Yonehara +60 more
TL;DR: In this paper, the authors present the result of microlensing event MOA-2016-BLG-290, which received observations from the two-wheel Kepler (K2), Spitzer, as well as ground-based observatories.
Journal ArticleDOI
OGLE-2015-BLG-1459L: The Challenges of Exo-Moon Microlensing
K. H. Hwang,Andrzej Udalski,Ian A. Bond,Michael D. Albrow,S. J. Chung,S. J. Chung,Andrew Gould,Andrew Gould,Andrew Gould,C. Han,Youn Kil Jung,Yoon-Hyun Ryu,In-Gu Shin,Jennifer C. Yee,Wei Zhu,Sang-Mok Cha,Sang-Mok Cha,Dong-Jin Kim,Hyoun-Woo Kim,Shinyoung Kim,Shinyoung Kim,C.-U. Lee,C.-U. Lee,D. J. Lee,Yongseok Lee,Yongseok Lee,Byeong-Gon Park,Byeong-Gon Park,Richard W. Pogge,Michał Pawlak,Radek Poleski,Radek Poleski,Michał K. Szymański,Jan Skowron,Igor Soszyński,Przemek Mróz,Szymon Kozłowski,Paweł Pietrukowicz,Krzysztof Ulaczyk,Fumio Abe,Yuichiro Asakura,Richard Barry,David P. Bennett,Aparna Bhattacharya,Martin Donachie,Phil Evans,Akihiko Fukui,Yuki Hirao,Yoshitaka Itow,Kohei Kawasaki,Naoki Koshimoto,Man Cheung Alex Li,C. H. Ling,Kimiaki Masuda,Yutaka Matsubara,Shota Miyazaki,Yasushi Muraki,Masayuki Nagakane,K. Ohnishi,Clément Ranc,Nicholas J. Rattenbury,To. Saito,A. Sharan,Denis J. Sullivan,Takahiro Sumi,Daisuke Suzuki,Daisuke Suzuki,Paul J. Tristram,T. Yamada,Atsunori Yonehara +69 more
TL;DR: The OGLE project has received funding from the National Science Centre, Poland, grant MAESTRO 2014/14/A/ST9/00121 to AU as discussed by the authors, and the data were obtained at three host sites of CTIO in Chile, SAAO in South Africa, and SSO in Australia.
Journal ArticleDOI
A Planetary Microlensing Event with an Unusually Red Source Star: MOA-2011-BLG-291
David P. Bennett,David P. Bennett,Andrzej Udalski,Ian A. Bond,Daisuke Suzuki,Yoon-Hyun Ryu,Fumio Abe,Richard Barry,Aparna Bhattacharya,Aparna Bhattacharya,Martin Donachie,Akihiko Fukui,Akihiko Fukui,Yuki Hirao,Yuki Hirao,Yuki Hirao,Kohei Kawasaki,Iona Kondo,Naoki Koshimoto,Man Cheung Alex Li,Yutaka Matsubara,Shota Miyazaki,Yasushi Muraki,Masayuki Nagakane,Koji Ohnishi,Clément Ranc,Nicholas J. Rattenbury,Haruno Suematsu,Takahiro Sumi,Paul J. Tristram,Atsunori Yonehara,Michał K. Szymański,Igor Soszyński,Łukasz Wyrzykowski,Krzysztof Ulaczyk,Krzysztof Ulaczyk,Radek Poleski,Radek Poleski,Szymon Kozłowski,Paweł Pietrukowicz,Jan Skowron,Yossi Shvartzvald,D. Maoz,Shai Kaspi,M. Friedmann,V. Batista,Darren L. DePoy,Subo Dong,B. Scott Gaudi,Andrew Gould,Andrew Gould,Andrew Gould,Cheongho Han,Richard W. Pogge,Thiam-Guan Tan,Jennifer C. Yee +55 more
TL;DR: In this article, the authors present the analysis of the planetary microlensing event MOA-2011-BLG-291, which has a mass ratio of q = (3.8 ± 0.7) × 10−4 and a source star that is redder (or brighter) than the bulge main sequence.
Journal ArticleDOI
Spectroscopic Mass and Host-star Metallicity Measurements for Newly Discovered Microlensing Planet OGLE-2018-BLG-0740Lb
Cheongho Han,Jennifer C. Yee,Andrzej Udalski,Ian A. Bond,Valerio Bozza,Arnaud Cassan,Yuki Hirao,Subo Dong,Juna A. Kollmeier,Nidia Morrell,K. Boutsia,Michael D. Albrow,Sun-Ju Chung,Sun-Ju Chung,Andrew Gould,Andrew Gould,Andrew Gould,K. H. Hwang,Chung-Uk Lee,Yoon-Hyun Ryu,In-Gu Shin,Yossi Shvartzvald,Youn Kil Jung,Doeon Kim,Woong-Tae Kim,Sang-Mok Cha,Sang-Mok Cha,Dong-Jin Kim,Hyoun-Woo Kim,Kyeongsoo Hong,Seung-Lee Kim,Seung-Lee Kim,D. J. Lee,Yongseok Lee,Yongseok Lee,Byeong-Gon Park,Byeong-Gon Park,Richard W. Pogge,Weicheng Zang,Przemek Mróz,Michał K. Szymański,Jan Skowron,Radek Poleski,Igor Soszyński,Paweł Pietrukowicz,Szymon Kozłowski,Krzysztof Ulaczyk,K. A. Rybicki,Patryk Iwanek,Marcin Wrona,Fumio Abe,Richard Barry,David P. Bennett,David P. Bennett,Aparna Bhattacharya,Aparna Bhattacharya,Martin Donachie,Akihiko Fukui,Akihiko Fukui,Yoshitaka Itow,Kohei Kawasaki,Iona Kondo,Naoki Koshimoto,Man Cheung Alex Li,Yutaka Matsubara,Yasushi Muraki,Shota Miyazaki,Masayuki Nagakane,Clément Ranc,Nicholas J. Rattenbury,Haruno Suematsu,Denis J. Sullivan,Takahiro Sumi,Daisuke Suzuki,Paul J. Tristram,Atsunori Yonehara +75 more
TL;DR: In this article, a microlensing planet OGLE-2018-BLG-0740Lb was detected with a very strong signal of Δχ^2 ~ 4630, but the interpretation of the signal suffers from two types of degeneracies.