Distances to Galactic methanol masers

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We present the first EVN parallax measurements of 6.7 GHz methanol masers in star forming regions of the Galaxy. The 6.7 GHz methanol maser transition is a very valuable astrometric tool, for its large stability and confined velocity spread, which makes it ideal to measure proper motions and parallaxes. Eight well-studied massive star forming regions have been observed during five EVN sessions of 24 hours duration each and we present here preliminary results for five of them. We achieve accuracies of up to 51 $μ$as, which still have the potential to be proved by more ideal observational circumstances.
6 pages, 1 figure, corrected typos, 9th EVN Symposium, September 23-26, 2008, Bologna, Italy

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Astrophysics

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http://salesiana.dossiersoluciones.com/handle/123456789/209810

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0812.0905
 http://arxiv.org/abs/0812.0905

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arXiv