S
Satoshi Sakai
Publications - 17
Citations - 628
Satoshi Sakai is an academic researcher. The author has contributed to research in topics: Astrometry & Maser. The author has an hindex of 8, co-authored 17 publications receiving 620 citations.
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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
Astrometry of Galactic Star-Forming Region Sharpless 269 with VERA : Parallax Measurements and Constraint on Outer Rotation Curve
Mareki Honma,Takeshi Bushimata,Yoon Kyung Choi,Tomoya Hirota,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,Katsuhisa Sato,Tetsuo Sasao,Katsunori M. Shibata,Motonobu Shintani,Hiroshi Suda,Yoshiaki Tamura,Miyuki Tsushima,Kazuyoshi Yamashita +30 more
TL;DR: In this article, a trigonometric parallax of 189 ˙ 8� was measured for H2O maser sources in the Galactic star-forming region Sharpless 269 (S269), corresponding to a source distance of 5:28 + 0:24 � 0:22 kpc.
Journal ArticleDOI
Distance to NGC 281 in a Galactic Fragmenting Superbubble: Parallax Measurements with VERA
Mayumi Sato,Tomoya Hirota,Mareki Honma,Hideyuki Kobayashi,Hideyuki Kobayashi,Tetsuo Sasao,Takeshi Bushimata,Yoon Kyung Choi,Hiroshi Imai,Kenzaburo Iwadate,Takaaki Jike,Seiji Kameno,Osamu Kameya,Ryuichi Kamohara,Yukitoshi Kan-ya,Noriyuki Kawaguchi,Mi Kyoung Kim,Seisuke Kuji,Tomoharu Kurayama,Seiji Manabe,Makoto Matsui,Naoko Matsumoto,Takeshi Miyaji,Takumi Nagayama,Akiharu Nakagawa,Kayoko Nakamura,Chung Sik Oh,Toshihiro Omodaka,Tomoaki Oyama,Satoshi Sakai,Katsuhisa Sato,Katsunori M. Shibata,Yoshiaki Tamura,Kazuyoshi Yamashita +33 more
TL;DR: In this article, the Japanese VLBI array VERA was used to perform high-precision astrometry of an H2O maser source in the Galactic star-forming region NGC 281 West, which has been considered to be part of a 300-pc superbubble.
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VLBI Astrometry of AGB Variables with VERA — A Semiregular Variable S Crateris—
Akiharu Nakagawa,Miyuki Tsushima,Kazuma Ando,Takeshi Bushimata,Yoon Kyung Choi,Tomoya Hirota,Tomoya Hirota,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,Toshihisa Maeda,Seiji Manabe,Kenta Maruyama,Makoto Matsui,Naoko Matsumoto,Takeshi Miyaji,Takumi Nagayama,Kayoko Nakamura,Daisuke Nyu,Chung Sik Oh,Toshihiro Omodaka,Tomoaki Oyama,Nicolas Pradel,Satoshi Sakai,Tetsuo Sasao,Tetsuo Sasao,Katsuhisa Sato,Mayumi Sato,Katsunori M. Shibata,Hiroshi Suda,Yoshiaki Tamura,Kousuke Ueda,Yuji Ueno,Kazuyoshi Yamashita +44 more
TL;DR: In this article, a distance measurement for the semiregular variable S Crateris (S Crt) based on its annual parallax was presented, and the absolute proper motion of a water maser spot associated with S Crt, referred to the quasar J1147� 0724, was measured with the unique dual beam system of the VLBI Exploration for Radio Astrometry (VERA) telescopes.
Journal ArticleDOI
Absolute Proper Motions of H2O Masers Away from the Galactic Plane Measured with VERA in the “Superbubble” Region NGC 281
Mayumi Sato,Tomoya Hirota,Mareki Honma,Hideyuki Kobayashi,Hideyuki Kobayashi,Tetsuo Sasao,Takeshi Bushimata,Yoon Kyung Choi,Hiroshi Imai,Kenzaburo Iwadate,Takaaki Jike,Seiji Kameno,Osamu Kameya,Ryuichi Kamohara,Yukitoshi Kan-ya,Noriyuki Kawaguchi,Masachika Kijima,Mi Kyoung Kim,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,Katsuhisa Sato,Katsunori M. Shibata,Motonobu Shintani,Yoshiaki Tamura,Miyuki Tsushima,Kazuyoshi Yamashita +37 more
TL;DR: In this article, the absolute proper-motion measurements of an H 2 O maser source in the NGC 281 Westmolecular cloud were reported, which is located ∼320 pc above the Galactic plane and is associated with an H I loop extending from the galactic plane.