Water Maser Motions in W3(OH) and a Determination of Its Distance
K. Hachisuka,K. Hachisuka,Andreas Brunthaler,Andreas Brunthaler,Karl M. Menten,Mark J. Reid,Hiroshi Imai,Yoshiaki Hagiwara,Makoto Miyoshi,Shinji Horiuchi,Tetsuo Sasao +10 more
TLDR
In this article, phase-referencing VLBA observations of H2O masers near the star-forming region W3(OH) to measure their parallax and absolute proper motions are reported.Abstract:
We report phase-referencing VLBA observations of H2O masers near the star-forming region W3(OH) to measure their parallax and absolute proper motions. The measured annual parallax is 0.489 ± 0.017 mas (2.04 ± 0.07 kpc), where the error is dominated by a systematic atmospheric contribution. This distance is consistent with photometric distances from previous observations and with the distance determined from CH3OH maser astrometry presented in a related paper. We also find that the source driving the H2O outflow, the "TW-object," moves with a three-dimensional velocity of >7 km s-1 relative to the ultracompact H II region W3(OH).read more
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Trigonometric parallaxes of high mass star forming regions: the structure and kinematics of the milky way
Mark J. Reid,Karl M. Menten,Andreas Brunthaler,Xingwu Zheng,Thomas M. Dame,Ye Xu,Yuefang Wu,B. Zhang,Alberto Sanna,Mayumi Sato,Kazuya Hachisuka,Y. K. Choi,K. Immer,L. Moscadelli,K. L. J. Rygl,A. Bartkiewicz +15 more
TL;DR: In this paper, the authors estimate the radius to the Galactic center, R-0, to be 8.34 +/- 0.16 kpc, a circular rotation speed at the Sun, Theta(0), to be 240 +/- 8 km s(-1), and a rotation curve that is nearly flat.
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
The distance to the Orion Nebula
TL;DR: In this paper, the authors used the Very Long Baseline Array (VLBA) to measure the parallax of stars of the Orion Nebula Cluster showing non-thermal radio emission, and determined the distance to the cluster to be 414 ± 7 pc.
Journal ArticleDOI
The distance to the Orion Nebula
TL;DR: In this paper, the authors used the Very Long Baseline Array (VLBA) to measure the parallax of stars of the Orion Nebula Cluster showing non-thermal radio emission, and determined the distance to the cluster to be 414 +/- 7 pc.
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.
References
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Journal ArticleDOI
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