T
Tomoya Hirota
Researcher at Graduate University for Advanced Studies
Publications - 245
Citations - 10263
Tomoya Hirota is an academic researcher from Graduate University for Advanced Studies. The author has contributed to research in topics: Maser & Protostar. The author has an hindex of 48, co-authored 228 publications receiving 9395 citations. Previous affiliations of Tomoya Hirota include Kagoshima University & National Institutes of Natural Sciences, Japan.
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Journal ArticleDOI
Trigonometric parallaxes of massive star-forming regions. vi. galactic structure, fundamental parameters, and noncircular motions
Mark J. Reid,Karl M. Menten,X. W. Zheng,Andreas Brunthaler,Luca Moscadelli,Y. Xu,Y. Xu,Bing Zhang,M. Sato,Mareki Honma,Tomoya Hirota,K. Hachisuka,Y. K. Choi,G. A. Moellenbrock,Anna Bartkiewicz +14 more
TL;DR: In this article, the authors used the Very Long Baseline Array and the Japanese VLBI Exploration of Radio Astronomy project to measure trigonometric parallaxes and proper motions of masers found in high-mass star-forming regions across the Milky Way.
Journal ArticleDOI
Trigonometric Parallaxes of Massive Star Forming Regions: VI. Galactic Structure, Fundamental Parameters and Non-Circular Motions
M. J. Reid,Karl M. Menten,Xingwu Zheng,Andreas Brunthaler,L. Moscadelli,Y. Xu,Bo Zhang,Mayumi Sato,Mareki Honma,Tomoya Hirota,K. Hachisuka,Y. K. Choi,G. A. Moellenbrock,Anna Bartkiewicz +13 more
TL;DR: In this paper, the authors used the VLBA and the Japanese VERA project to measure trigonometric parallaxes and proper motions of masers found in high-mass star-forming regions across the Milky Way.
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.
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Change in the chemical composition of infalling gas forming a disk around a protostar
Nami Sakai,Takeshi Sakai,Tomoya Hirota,Yoshimasa Watanabe,Cecilia Ceccarelli,Claudine Kahane,Sandrine Bottinelli,Sandrine Bottinelli,Emmanuel Caux,Emmanuel Caux,K. Demyk,K. Demyk,Charlotte Vastel,Charlotte Vastel,Audrey Coutens,Vianney Taquet,Nagayoshi Ohashi,Nagayoshi Ohashi,Shigehisa Takakuwa,Hsi-Wei Yen,Hsi-Wei Yen,Yuri Aikawa,Satoshi Yamamoto +22 more
TL;DR: It is reported that the unsaturated hydrocarbon molecule cyclic-C3H2 resides in the infalling rotating envelope, whereas sulphur monoxide is enhanced in the transition zone at the radius of the centrifugal barrier (100 ± 20 au), which is the radius at which the kinetic energy of the inf falling gas is converted to rotational energy.