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VLBI Astrometry of AGB Variables with VERA -- A Semiregular Variable S Crateris --
Akiharu Nakagawa, Miyuki Tsushima, Kazuma Ando +40
We present a distance measurement for the semiregular variable S Crateris (S Crt) based on its annual parallax. With the unique dual beam system of the VLBI Exploration for Radio A…
Distance to VY Canis Majoris with VERA
Yoon Kyung Choi, Tomoya Hirota, Mareki Honma +33
We report astrometric observations of H2O masers around the red supergiant VY Canis Majoris (VY CMa) carried out with VLBI Exploration of Radio Astrometry (VERA). Based on astromet…
Astrometry of HO Masers in Nearby Star-Forming Regions with VERA. III. IRAS 22198+6336 in L1204G
Tomoya Hirota, Kazuma Ando, Takeshi Bushimata +35
We present results of multi-epoch VLBI observations with VERA (VLBI Exploration of Radio Astrometry) of the 22 GHz HO masers associated with a young stellar object (YSO) IRAS…
Distance to NGC 281 in a Galactic Fragmenting Superbubble: Parallax Measurements with VERA
Mayumi Sato, Tomoya Hirota, Mareki Honma +30
We have used the Japanese VLBI array VERA to perform high-precision astrometry of an H2O maser source in the Galactic star-forming region NGC 281 West, which has been considered to…
A Molecular Line Observation toward Massive Clumps Associated with Infrared Dark Clouds
Takeshi Sakai, Nami Sakai, Kazuhisa Kamegai +4
We have surveyed the N2H+ J=1-0, HC3N J=5-4, CCS J_N=4_3-3_2, NH3 (J, K) = (1, 1), (2, 2), (3, 3), and CH3OH J=7-6 lines toward the 55 massive clumps associated with infrared dark…