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A search for water maser emission from post-AGB stars

Published online by Cambridge University Press:  01 March 2007

J. M. Chapman ,
R. M. Deacon ,
A. J. Green  and
M. Cohen
J. M. Chapman
Affiliation:
Australia Telescope National Facility, PO Box 76, Epping, NSW 1710, Australia
R. M. Deacon
Affiliation:
School of Physics A29, University of Sydney, NSW 2006, Australia
A. J. Green
Affiliation:
School of Physics A29, University of Sydney, NSW 2006, Australia
M. Cohen
Affiliation:
Radio Astronomy Laboratory, University of California, Berkeley, CA 94720, USA
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Abstract

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We have used the Tidbinbilla 70-m antenna to search for 22 GHz H2O maser emission from a sample of 85 evolved stars. 21 detections were made. Of these 15 were from massive AGB stars. High-velocity H2O maser emission was detected from five sources, of which four are post-AGB stars. Three of the high-velocity sources, b292 (IRAS 18043–2116), d46 (IRAS 15445–5449), and d62 (IRAS 15544–5332) were new discoveries. d46 is also a source of non-thermal radio continuum emission. The high-velocity H2O maser emission and the radio continuum from post-AGB stars are probably associated with shocks that form from wind-wind interactions.

Keywords

masersstars: AGB and post-AGBevolutionmass-lossradio continuum
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S242: Astrophysical Masers and their Environments , March 2007 , pp. 287 - 291
Copyright
Copyright © International Astronomical Union 2008

References

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