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- Title
Trigonometric parallax of the protoplanetary nebula OH 231.8+4.2.
- Authors
Choi, Yoon Kyung; Brunthaler, Andreas; Menten, Karl M.; Reid, Mark J.
- Abstract
We report trigonometric parallx measurements for H2O masers around the protoplanetary nebula OH 231.8+4.2 carried out with the Very Long Baseline Array. Based on astrometric monitoring for 1 year, we measured a trigonometric parallax of 0.89 ± 0.04 mas, corresponding to a distance of 1.12+0.05−0.05 kpc. This is the most accurate distance to OH 231.8+4.2, and the first one based on an annual parallax measurement. The distribution and internal motions of the H2O masers are consistent with the bipolar outflow suggested in literatures.
- Publication
Proceedings of the International Astronomical Union, 2011, Vol 7, Issue S283, p330
- ISSN
1743-9213
- Publication type
Article
- DOI
10.1017/S1743921312011271