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Paper: Multi-epoch Observations of Water Masers in the Star Forming Region ON2 with VERA
Volume: 402, Approaching Micro-Arcsecond Resolution with VSOP-2: Astrophysics and Technologies
Page: 452
Authors: Ando, K.; Nakagawa, A.; Imai, H.; Kameno, S.; Omodaka, T.
Abstract: We present the results of monthly monitoring VLBI observations of water maser emission in the star forming region ON2 with the VLBI Exploration of Radio Astrometry (VERA). Relative proper motions of the water masers indicate the existence of an outflow from a YSO in the east-west direction. Correlation was found between radial velocities of the water masers and those of OH masers. Measurements of the absolute proper motion and a trigonometric parallax of the masers are also in progress. We clearly detect their Galactic rotation (μl, μb)=( -6.04 ,-0.58)[mas/yr], corresponding a a Galactic rotation velocity of 220 km/s at the Galactocentric distance of 8.5 kpc.
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