VLBA H2O and SiO maser observations in the pPN OH 231.8+4.2

Details VLBA H2O and SiO maser observations in the pPN OH 231.8+4.2 VLBA H2O and SiO maser observations in the pPN OH 231.8+4.2

Mar 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007iaus..242..338d&link_type=abstract

Astrophysical Masers and their Environments, Proceedings of the International Astronomical Union, IAU Symposium, Volume 242, p.

Astronomy and Astrophysics

Astrophysics

Maser, Stars: Agb And Post-Agb, Radio Lines: Stars

Scientific paper

We report high-resolution observations of H2O, 61,6-52,3 and 28SiO v=2, J=1-0 maser emissions obtained with the Very Long Baseline Array in the bipolar pre-planetary nebulae OH 231.8+4.2 (see Desmurs et al., 2007). A phase referencing technique was used to recover the absolute position of both emissions. We detected two groups of water vapour emission oriented nearly north-south. SiO masers are tentatively found to be placed between the two H2O maser emitting regions.

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