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Registration of H2O and SiO masers in the Calabash Nebula, to confirm the Planetary Nebula paradigm

Published online by Cambridge University Press:  16 July 2018

R. Dodson ,
M. Rioja ,
V. Bujarrabal ,
J. Kim ,
S. H. Cho ,
Y. K. Choi  and
Y. Youngjoo
R. Dodson
Affiliation:
International Centre for Radio Astronomy Research, UWA, 35 Stirling Hwy, Western Australia
M. Rioja
Affiliation:
International Centre for Radio Astronomy Research, UWA, 35 Stirling Hwy, Western Australia CSIRO Astronomy and Space Science, 26 Dick Perry Avenue, Kensington WA 6151, Australia Observatorio Astronómico Nacional (IGN), Alfonso XII, 3 y 5, 28014 Madrid, Spain
V. Bujarrabal
Affiliation:
Observatorio Astronómico Nacional (IGN), Alfonso XII, 3 y 5, 28014 Madrid, Spain
J. Kim
Affiliation:
Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China
S. H. Cho
Affiliation:
Korea Astronomy and Space Science Institute 776, Daedeokdae-ro, Yuseong-gu, Daejeon, 34055, Republic of Korea
Y. K. Choi
Affiliation:
Korea Astronomy and Space Science Institute 776, Daedeokdae-ro, Yuseong-gu, Daejeon, 34055, Republic of Korea
Y. Youngjoo
Affiliation:
Korea Astronomy and Space Science Institute 776, Daedeokdae-ro, Yuseong-gu, Daejeon, 34055, Republic of Korea
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Abstract

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We report on the astrometric registration of VLBI images of the SiO and H2O masers in OH 231.8+4.2, the iconic Proto-Planetary Nebula also known as the Calabash nebula, using the KVN and Source/Frequency Phase Referencing. This, for the first time, robustly confirms the alignment of the SiO masers, close to the AGB star, which drives the bi-lobe structure with the water masers in the out-flow.

Keywords

stars: individual: QX Pup–stars: AGB and post-AGB–masers–stars: evolution
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 13 , Symposium S336: Astrophysical Masers: Unlocking the Mysteries of the Universe , September 2017 , pp. 373 - 376
Copyright
Copyright © International Astronomical Union 2018 

References

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