Proc. IAU volume 13, issue S336, P369-372 2017 DOI: 10.1017/s1743921317010572 View full text
Daniel Tafoya, Wouter H. T. Vlemmings, Andres F. Pérez-Sánchez

Abstract: AbstractWe present the results of the first detection of submillimeter water maser emission toward water-fountain nebulae. Using APEX we found emission at 321.226 GHz toward two sources: IRAS 18043−2116, and IRAS 18286−0959. The submillimeter H2O masers exhibit expansion velocities larger than those of the OH masers, suggesting that these masers, similarly to the 22 GHz masers, originate in fast bipolar outflows. The 321 GHz masers in IRAS 18043−2116 and IRAS 18286−0959, which figure among the sources with the…

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