TL;DR
This paper reports the first unambiguous detection of water maser emission in planetary nebulae, specifically in K 3-35 and IRAS 17347-3139, challenging previous expectations about maser survival.
Contribution
It provides the first confirmed observations of water masers in planetary nebulae, expanding understanding of maser phenomena in late stellar evolution stages.
Findings
Water masers detected in K 3-35 and IRAS 17347-3139
Water masers can survive in planetary nebulae for hundreds of years
Challenges previous assumptions about maser disappearance in PNe
Abstract
Stars at the top of the asymptotic giant branch (AGB) can exhibit maser emission from molecules like SiO, H2O and OH. As the star evolves to the planetary nebula phase, mass-loss stops and ionization of the envelope begins, making the masers disappear progressively. The OH masers in PNe can be present in the envelope for periods of ~1000 years but the water masers can survive only hundreds of years. Then, water maser emission is not expected in planetary nebulae! We discuss the unambiguous detection of water maser emission in two planetary nebulae: K 3-35 and IRAS 17347-3139.
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Taxonomy
TopicsAstrophysics and Star Formation Studies · Stellar, planetary, and galactic studies · Astronomy and Astrophysical Research