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Water masers as signposts of extremely young planetary nebulae

Published online by Cambridge University Press:  16 July 2018

José F. Gómez ,
Luis F. Miranda ,
Lucero Uscanga  and
Olga Suárez
José F. Gómez
Affiliation:
Instituto de Astrofísica de Andalucía, CSICGlorieta de la Astronomía s/n, 18008 Granada, Spain email: [email protected]
Luis F. Miranda
Affiliation:
Instituto de Astrofísica de Andalucía, CSICGlorieta de la Astronomía s/n, 18008 Granada, Spain email: [email protected]
Lucero Uscanga
Affiliation:
Departamento de Astronomía, Universidad de GuanajuatoA.P. 144, 36000 Guanajuato, Gto., Mexico
Olga Suárez
Affiliation:
Université Côte d’Azur, OCA, CNRS, Laboratoire Lagrange, F-06304 Nice, France
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Abstract

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Only five planetary nebulae (PNe) have been confirmed to emit water masers. They seem to be very young PNe. The water emission in these objects preferentially traces circumstellar toroids, although in K 3-35 and IRAS 15103-5754, it may also trace collimated jets. We present water maser observations of these two sources at different epochs. The water maser distribution changes on timescales of months to a few years. We speculate that these changes may be due to the variation of the underlying radio continuum emission, which is amplified by the maser process in the foreground material.

Keywords

masersstars: AGB and post-AGBplanetary nebulae: general
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. 377 - 380
Copyright
Copyright © International Astronomical Union 2018 

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