H
Hiroshi Suda
Researcher at University of Tokyo
Publications - 20
Citations - 652
Hiroshi Suda is an academic researcher from University of Tokyo. The author has contributed to research in topics: Maser & Very-long-baseline interferometry. The author has an hindex of 12, co-authored 20 publications receiving 631 citations.
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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
Dual-Beam Delay Calibration for VERA
Mareki Honma,Masachika Kijima,Hiroshi Suda,Noriyuki Kawaguchi,Hideyuki Kobayashi,Takeshi Bushimata,Rie Shimizu,Akane Yoshimura,Tetsuo Sasao,Tetsuo Sasao,Tomoya Hirota,Hiroshi Imai,Kenzaburo Iwadate,Takaaki Jike,Osamu Kameya,Ryuichi Kamohara,Seisuke Kuji,Tomoharu Kurayama,Seiji Manabe,Takeshi Miyaji,Akiharu Nakagawa,Toshihiro Omodaka,Tomoaki Oyama,Satoshi Sakai,Katsuhisa Sato,Katsunori M. Shibata,Yoshiaki Tamura +26 more
TL;DR: In this article, the horn-on-dish method was used to calibrate the dual-beam delay difference in the antenna structure and receiver within an � 0.1 mm level.
Journal ArticleDOI
Astrometry of H$_2$O Masers in Nearby Star-Forming Regions with VERA I. IRAS 16293$-$2422 in $\rho$ Oph East
Hiroshi Imai,Kohichiro Nakashima,Takeshi Bushimata,Yoon Kyung Choi,Tomoya Hirota,Mareki Honma,K. Horiai,Noritomo Inomata,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,Sei-ichiro Sakakibara,Katsuhisa Sato,Tetsuo Sasao,Tetsuo Sasao,Katsunori M. Shibata,Rie Shimizu,Motonobu Shintani,Yoshiaki Sofue,Kasumi Sora,Hiroshi Suda,Yoshiaki Tamura,Miyuki Tsushima,Yuji Ueno,Kazuyoshi Yamashita +39 more
TL;DR: In this paper, the authors reported on results of multi-epoch VLBI observations of H2O masers associated with a low-mass young stellar object, IRAS 16293 2422 in Oph East, and a fringe-phase and position reference source, ICRF J162546.8 252738.
Journal ArticleDOI
First Fringe Detection with VERA's Dual-Beam System and Its Phase-Referencing Capability
Mareki Honma,T. Fujii,Tomoya Hirota,K. Horiai,Kenzaburo Iwadate,Takaaki Jike,Osamu Kameya,Ryuichi Kamohara,Yukitoshi Kan-ya,Noriyuki Kawaguchi,Hideyuki Kobayashi,Seisuke Kuji,Tomoharu Kurayama,Seiji Manabe,Takeshi Miyaji,Kouichirou Nakashima,Toshihiro Omodaka,Tomoaki Oyama,Satoshi Sakai,Sei-ichiro Sakakibara,Katsuhisa Sato,Tetsuo Sasao,Katsunori M. Shibata,Rie Shimizu,Hiroshi Suda,Yoshiaki Tamura,Hideki Ujihara,Akane Yoshimura +27 more
TL;DR: In this paper, the results of the first dual-beam observations with VERA (VLBI Exploration of Radio Astrometry) were presented, and the results demonstrate the high capability of phase referencing, indicating that it is a promising tool for phase-referencing VLBI astrometry at 10 µas-level accuracy.
Journal ArticleDOI
First Fringe Detection with VERA's Dual-Beam System and its Phase Referencing Capability
Mareki Honma,T. Fujii,Tomoya Hirota,K. Horiai,Kenzaburo Iwadate,Takaaki Jike,Osamu Kameya,Ryuichi Kamohara,Yukitoshi Kan-ya,K. Kawaguchi,Hideyuki Kobayashi,Seisuke Kuji,Tomoharu Kurayama,Seiji Manabe,T. Miyaji,Kouichirou Nakashima,Toshihiro Omodaka,Tomoaki Oyama,Satoshi Sakai,Sei-ichiro Sakakibara,Katsuhisa Sato,Tetsuo Sasao,Katsunori M. Shibata,R. Shimizu,Hiroshi Suda,Yoichi Tamura,Hideki Ujihara,A. Yoshimura +27 more
TL;DR: The first dual-beam observations of a pair of H2O maser sources W49N and OH43.1 have been carried out on 2002 May 29 and July 23 as discussed by the authors.