@article{oai:ir.kagoshima-u.ac.jp:00011545,
 author = {Ando, Kazuma and 安藤, 和真 and Nagayama, Takumi and 永山, 匠 and Omodaka, Toshihiro and 面髙, 俊宏 and Handa, Toshihiro and 半田, 利弘 and Imai, Hiroshi and 今井, 裕 and Nakagawa, Akiharu and 中川, 亜紀治 and Nakanishi, Hiroyuki and 中西, 裕之 and Honma, Mareki and 本間, 希樹 and Kobayashi, Hideyuki and 小林, 秀行 and Miyaji, Takeshi and 宮地, 竹史},
 issue = {1},
 journal = {Publications of the Astronomical Society of Japan},
 month = {},
 note = {We performed the astrometry of  H2O masers in the Galactic star-forming region Onsala 2 North (ON 2 N) with the VLBI Exploration of Radio Astrometry (VERA). We obtained a trigonometric parallax of  0.261 ± 0.009 mas, corresponding to a heliocentric distance of 3.83 ± 0.13 kpc. ON 2 N is expected to be on the solar circle, because its radial velocity with respect to the local standard of rest (LSR) is nearly zero. By using the present parallax and proper motions of the masers, the galactocentric distance of the Sun and the Galactic rotation velocity at the Sun are found to be  R0 = 7.80 ± 0.26 kpc and Θ0 = 213 ±5 km s-1, respectively. The ratio of Galactic constants, namely the angular rotation velocity of the LSR, can be determined more precisely, and  is found to be Ω0 = Θ0 / R0 = 27.3±0.8 km s-1kpc-1, which is consistent with recent estimations, but different from 25.9 km s-1 kpc-1 derived from the recommended values of Θ0 and R0 by the International Astronomical Union (1985).},
 pages = {45--51},
 title = {Astrometry of Galactic Star-Forming Region ON2N with VERA : Estimation of the Galactic Constants},
 volume = {63},
 year = {2011},
 yomi = {オモダカ, トシヒロ and ハンダ, トシヒロ}
}