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.
masers
techniques: Interferometric
stars: AGB and post-AGB
astrometry
Author
G. Orosz
Kagoshima University
Joint Institute for VLBI in Europe (JIVE)
J. F. Gomez
Institute of Astrophysics of Andalusia (IAA)
Daniel Tafoya
Chalmers, Earth and Space Sciences, Onsala Space Observatory
Galactic Astrophysics
H. Imai
Kagoshima University
J. M. Torrelles
Institute of Space Studies of Catalonia (IEEC)
Ann Njeri Ngendo
University of Nairobi
R. A. Burns
Joint Institute for VLBI in Europe (JIVE)
Kagoshima University
Proceedings of the International Astronomical Union
1743-9213 (ISSN) 1743-9221 (eISSN)
Vol. 13 S336 351-354
IAU Symposium No.336, 2017
, ,
, ,
Subject Categories
Globalization Studies
Astronomy, Astrophysics and Cosmology
Oceanography, Hydrology, Water Resources
Infrastructure
Onsala Space Observatory
DOI
10.1017/S1743921317009589