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VERA and ALMA Observations of the H2O Supermaser Burst in Orion KL
Tomoya Hirota, Masato Tsuboi, Yasutaka Kurono +5
The 22 GHz H2O maser in Orion KL has shown extraordinary burst events in 1979-1985 and 1998-1999, sometimes called supermaser. We have conducted monitoring observations of the supe…
Hot Molecular Circumstellar Disk around Massive Protostar Orion Source I
Tomoya Hirota, Mi Kyoung Kim, Yasutaka Kurono +1
We report new Atacama Large Millimeter/Submillimeter Array (ALMA) observations of a circumstellar disk around Source I in Orion KL, an archetype of massive protostar candidate. We…
Accurate Parallax Measurement toward the Symbiotic Star R Aquarii
Cheulhong Min, Naoko Matsumoto, Mi Kyoung Kim +5
Multi-epoch phase-referencing VLBI (Very Long Baseline Interferometry) observations with VERA (VLBI Exploration of Radio Astrometry) were performed for the symbiotic star R Aquarii…