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Yoon Kyung Choi
Researcher at Max Planck Society
Publications - 36
Citations - 2268
Yoon Kyung Choi is an academic researcher from Max Planck Society. The author has contributed to research in topics: Maser & Astrometry. The author has an hindex of 17, co-authored 36 publications receiving 2194 citations. Previous affiliations of Yoon Kyung Choi include University of Tokyo & Korea Astronomy and Space Science Institute.
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Journal ArticleDOI
Astrometry of H2O Masers in Nearby Star-Forming Regions with VERA II SVS 13 in NGC 1333
Tomoya Hirota,Takeshi Bushimata,Yoon Kyung Choi,Mareki Honma,Hiroshi Imai,Kenzaburo Iwadate,Takaaki Jike,Osamu Kameya,Ryuichi Kamohara,Yukitoshi Kan-ya,Noriyuki Kawaguchi,Masachika Kijima,Hideyuki Kobayashi,Seisuke Kuji,Tomoharu Kurayama,Seiji Manabe,Takeshi Miyaji,Takumi Nagayama,Akiharu Nakagawa,Chung Sik Oh,Toshihiro Omodaka,Tomoaki Oyama,Satoshi Sakai,Tetsuo Sasao,Tetsuo Sasao,Katsuhisa Sato,Katsunori M. Shibata,Yoshiaki Tamura,Kazuyoshi Yamashita +28 more
TL;DR: In this article, the authors measured the annual parallax of the maser features in SVS 13 of 4.25 ˙ 0.32 mas, corresponding to a distance of 235 ˘ 18 pc from the Sun.
Journal ArticleDOI
Astrometry of Water Maser Sources in Nearby Molecular Clouds with VERA - II. SVS 13 in NGC 1333
Tomoya Hirota,Takeshi Bushimata,Yoon Kyung Choi,Mareki Honma,Hiroshi Imai,Kenzaburo Iwadate,Takaaki Jike,Osamu Kameya,Ryuichi Kamohara,Yukitoshi Kan-ya,Noriyuki Kawaguchi,Masachika Kijima,Hideyuki Kobayashi,Seisuke Kuji,Tomoharu Kurayama,Seiji Manabe,Takeshi Miyaji,Takumi Nagayama,Akiharu Nakagawa,Chung Sik Oh,Toshihiro Omodaka,Tomoaki Oyama,Satoshi Sakai,Tetsuo Sasao,Katsuhisa Sato,Katsunori M. Shibata,Yoshiaki Tamura,Kazuyoshi Yamashita +27 more
TL;DR: In this article, the authors reported the results of multi-epoch VLBI observations with VERA (VLBI Exploration of Radio Astrometry) of the 22 GHz H2O masers associated with the young stellar object SVS 13 in the NGC 1333 region.
Journal ArticleDOI
Distance to Orion KL Measured with VERA
Tomoya Hirota,Takeshi Bushimata,Yoon Kyung Choi,Mareki Honma,Hiroshi Imai,Kenzaburo Iwadate,Takaaki Jike,Seiji Kameno,Osamu Kameya,Ryuichi Kamohara,Yukitoshi Kan-ya,Noriyuki Kawaguchi,Masachika Kijima,Mi Kyoung Kim,Hideyuki Kobayashi,Seisuke Kuji,Tomoharu Kurayama,Seiji Manabe,Kenta Maruyama,Makoto Matsui,Naoko Matsumoto,Takeshi Miyaji,Takumi Nagayama,Akiharu Nakagawa,Kayoko Nakamura,Chung Sik Oh,Toshihiro Omodaka,Tomoaki Oyama,Satoshi Sakai,Tetsuo Sasao,Tetsuo Sasao,Katsuhisa Sato,Mayumi Sato,Katsunori M. Shibata,Motonobu Shintani,Yoshiaki Tamura,Miyuki Tsushima,Kazuyoshi Yamashita +37 more
TL;DR: In this article, the authors presented the initial results of multiepoch VLBI observations of 22 GHz H2O masers in the Orion KL region with VERA (VLBI Exploration of Radio Astrometry).
Journal ArticleDOI
SiO Maser Observations toward Orion-KL with VERA
Mi Kyoung Kim,Tomoya Hirota,Mareki Honma,Hideyuki Kobayashi,Takeshi Bushimata,Yoon Kyung Choi,Hiroshi Imai,Kenzaburo Iwadate,Takaaki Jike,Seiji Kameno,Osamu Kameya,Ryuichi Kamohara,Yukitoshi Kan-ya,Noriyuki Kawaguchi,Seisuke Kuji,Tomoharu Kurayama,Seiji Manabe,Makoto Matsui,Naoko Matsumoto,Takeshi Miyaji,Takumi Nagayama,Akiharu Nakagawa,Chung Sik Oh,Toshihiro Omodaka,Tomoaki Oyama,Satoshi Sakai,Tetsuo Sasao,Katsuhisa Sato,Mayumi Sato,Katsunori M. Shibata,Yoshiaki Tamura,Kazuyoshi Yamashita +31 more
TL;DR: In this article, the authors derived the trigonometric parallax of Orion-KL to be 2.39˙0.03mas, corresponding to a distance of 418˙6pc.
Journal ArticleDOI
Fundamental Parameters of the Milky Way Galaxy Based on VLBI astrometry
Mareki Honma,Takumi Nagayama,Kazuma Ando,Takeshi Bushimata,Yoon Kyung Choi,Toshihiro Handa,Tomoya Hirota,Hiroshi Imai,Takaaki Jike,Mi Kyoung Kim,Osamu Kameya,Noriyuki Kawaguchi,Hideyuki Kobayashi,Tomoharu Kurayama,Seisuke Kuji,Naoko Matsumoto,Seiji Manabe,Takeshi Miyaji,Kazuhito Motogi,Akiharu Nakagawa,Hiroyuki Nakanishi,Notaro Niinuma,Chung Sik Oh,Toshihiro Omodaka,Tomoaki Oyama,Nobuyuki Sakai,Katsuhisa Sato,Mayumi Sato,Katsunori Shibata,Satoshi Shiozaki,Kazuyoshi Sunada,Yoshiaki Tamura,Yuji Ueno,Aya Yamauchi +33 more
TL;DR: In this article, the fundamental parameters of the Galaxy were determined based on VLBI astrometry of 52 Galactic maser sources obtained with VERA, VLBA and EVN.