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Bow shocks in water fountain jets

Published online by Cambridge University Press:  16 July 2018

Gabor Orosz ,
José F. Gómez ,
Daniel Tafoya ,
Hiroshi Imai ,
José M. Torrelles ,
Ann Njeri Ngendo  and
Ross A. Burns
Gabor Orosz
Affiliation:
Kagoshima University, Kagoshima (Japan) email: gabor.orosz@gmail.com JIVE, Dwingeloo (Netherlands)
José F. Gómez
Affiliation:
IAA (CSIC), Granada (Spain)
Daniel Tafoya
Affiliation:
Chalmers, OSO, Onsala (Sweden)
Hiroshi Imai
Affiliation:
Kagoshima University, Kagoshima (Japan) email: gabor.orosz@gmail.com
José M. Torrelles
Affiliation:
ICE (CSIC-IEEC), Barcelona (Spain)
Ann Njeri Ngendo
Affiliation:
University of Nairobi, Nairobi (Kenya)
Ross A. Burns
Affiliation:
Kagoshima University, Kagoshima (Japan) email: gabor.orosz@gmail.com JIVE, Dwingeloo (Netherlands)
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Abstract

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We briefly introduce the VLBI maser astrometric analysis of IRAS 18043–2116 and IRAS 18113–2503, two remarkable and unusual water fountains with spectacular bipolar bow shocks in their high-speed collimated jet-driven outflows. The 22 GHz H2O maser structures and velocities clearly show that the jets are formed in very short-lived, episodic outbursts, which may indicate episodic accretion in an underlying binary system.

Keywords

maserstechniques: interferometricastrometrystars: AGB and post-AGB
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. 351 - 354
Copyright
Copyright © International Astronomical Union 2018 

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