Astrometry of H$_2$O Masers in Nearby Star-Forming Regions with VERA I. IRAS 16293$-$2422 in $\rho$ Oph East
| Autor: | Yuji Ueno, Masachika Kijima, Osamu Kameya, Noritomo Inomata, Seiji Manabe, Takumi Nagayama, Takaaki Jike, Kohichiro Nakashima, Chung Sik Oh, K. Horiai, Satoshi Sakai, Yukitoshi Kan-ya, Katsuhisa Sato, Tetsuo Sasao, Kazuyoshi Yamashita, Tomoharu Kurayama, Seisuke Kuji, Sei-ichiro Sakakibara, Noriyuki Kawaguchi, Yoshiaki Sofue, Mareki Honma, Yoon Kyung Choi, Akiharu Nakagawa, Kenzaburo Iwadate, Katsunori M. Shibata, Hideyuki Kobayashi, Miyuki Tsushima, Yoshiaki Tamura, Ryuichi Kamohara, Tomoya Hirota, Takeshi Miyaji, Tomoaki Oyama, Hiroshi Imai, Motonobu Shintani, Rie Shimizu, Hiroshi Suda, Takeshi Bushimata, Toshihiro Omodaka, Kasumi Sora |
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| Rok vydání: | 2007 |
| Předmět: |
Very large array
Physics Young stellar object Astronomy Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrometry Astrophysics law.invention Stars Space and Planetary Science law Bipolar outflow Very-long-baseline interferometry Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Maser Parallax Astrophysics::Galaxy Astrophysics |
| Zdroj: | Publications of the Astronomical Society of Japan. 59:1107-1113 |
| ISSN: | 2053-051X 0004-6264 |
| DOI: | 10.1093/pasj/59.6.1107 |
| Popis: | We report 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, using the VLBI Exploration of Radio Astrometry (VERA) for high-precision astrometry. We obtained an annual parallax of a maser feature to be = 5.6 0:5 mas, corresponding to a distance of D= 178 +18 37 pc. We also found 10 relative proper motions of maser features with respect to the maser feature mentioned above. The motion of the accompanying young stellar object (YSO) has already been found in thermal continuum emission previously observed with the Very Large Array. The intrinsic motions of masers have been estimated from the relative proper motions after the YSO’s motion is subtracted from, and a systemic secular motion of the position reference feature is added to the proper motions originally measured. The intrinsic maser kinematical structure may trace a bipolar outflow. |
| Databáze: | OpenAIRE |
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