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

R Dodson,S H Cho,Y K Choi,J Kim,Y Youngjoo,V Bujarrabal,M Rioja

doi:10.1017/s1743921317010547

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

R Dodson, S H Cho + Show 5 more

Open Access

https://doi.org/10.1017/s1743921317010547

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Journal: Proceedings of the International Astronomical Union. International Astronomical Union

Publication Date: Sep 1, 2017

Affiliation: International Centre for Radio Astronomy Research, Korea Astronomy and Space Science Institute, Shanghai Astronomical Observatory, Spanish National Observatory, Astronomy and Space, Commonwealth Scientific and Industrial Research Organisation

#SiO Masers #Phase Referencing + Show 8 more

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Abstract

AbstractWe 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.

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