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Water masers as signposts of extremely young planetary nebulae

  • José F. Gómez (a1), Luis F. Miranda (a1), Lucero Uscanga (a2) and Olga Suárez (a3)

Abstract

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.

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References

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Water masers as signposts of extremely young planetary nebulae

  • José F. Gómez (a1), Luis F. Miranda (a1), Lucero Uscanga (a2) and Olga Suárez (a3)

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