Astrometry of W49N - OH43.8-0.1 HO maser pair with VERA
Dec, 20042 pages
Part of Proceedings, 7th European VLBI Network Symposium on VLBI Scientific Research & Technology (EVN Symposium 2004) : Toledo, Spain, October 12-15, 2004, 203-204
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- Published: 2004
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- astro-ph/0412681 [astro-ph]
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Abstract: (arXiv)
We present the results of multi-epoch VERA observations of W49N - OH43.8-0.1 water maser pair. Based on the dual-beam VLBI observation with VERA, we successfully obtained the phase-referenced maps of OH43.8-0.1 with respect to the W49N reference spot for 3 epochs with a time span of 6 months. The maps were in good agreement with previous studies obtained with a single-beam VLBI, and were also consistent with each other with an accuracy of about 0.2 mas. Moreover, there are systematic, rather linear displacements of maser feature positions, which may be the relative proper motions of maser features caused by the Galactic rotation as well as internal motions of individual maser features.References(4)
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