Bow shocks in water fountain jets
Paper in proceeding, 2017
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.
astrometry
stars: AGB and post-AGB
masers
techniques: Interferometric
Author
G. Orosz
Joint Institute for VLBI in Europe (JIVE)
Kagoshima University
J. F. Gomez
Spanish National Research Council (CSIC)
Daniel Tafoya
Galactic Astrophysics
Chalmers, Earth and Space Sciences, Onsala Space Observatory
H. Imai
Kagoshima University
J. M. Torrelles
Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
Ann Njeri Ngendo
University of Nairobi
R. A. Burns
Kagoshima University
Joint Institute for VLBI in Europe (JIVE)
Proceedings of the International Astronomical Union
1743-9213 (ISSN) 1743-9221 (eISSN)
Vol. 13 S336 351-354
IAU Symposium No.336, 2017
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Subject Categories (SSIF 2011)
Globalization Studies
Astronomy, Astrophysics and Cosmology
Oceanography, Hydrology, Water Resources
Infrastructure
Onsala Space Observatory
DOI
10.1017/S1743921317009589