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Astrometry of Galactic Star-Forming Region ON2N with VERA: Estimation of the Galactic Constants
Kazuma Ando, Takumi Nagayama, Toshihiro Omodaka +7
We have performed the astrometry of H2O masers in the Galactic star-forming region Onsala 2 North (ON2N) with the VLBI Exploration of Radio Astrometry.We obtained the trigonometric…
Maser Properties of the Enigmatic IRAS Source 19312+1950
Jun-ichi Nakashima, Shuji Deguchi, Hiroshi Imai +2
The IRAS source, 19312+1950, exhibits SiO maser emission, which is predominantly detected in evolved stars enshrouded by a cold molecular envelope. In fact, the mojority of the obs…
Distance and Proper Motion Measurement of the Red Supergiant, S Persei, with VLBI H2O Maser Astrometry
Y. Asaki, S. Deguchi, H. Imai +3
We have conducted VLBA phase-referencing monitoring of H2O masers around the red supergiant, S Persei, for six years. We have fitted maser motions to a simple expanding-shell model…
Astrometry of HO Masers in Nearby Star-Forming Regions with VERA --- IV. L1448C
Tomoya Hirota, Mareki Honma, Hiroshi Imai +4
We have carried out multi-epoch VLBI observations with VERA (VLBI Exploration of Radio Astrometry) of the 22~GHz HO masers associated with a Class 0 protostar L1448C in the P…