Bow shocks in water fountain jets
Abstract
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.
- Publication:
-
Astrophysical Masers: Unlocking the Mysteries of the Universe
- Pub Date:
- August 2018
- DOI:
- arXiv:
- arXiv:1804.02672
- Bibcode:
- 2018IAUS..336..351O
- Keywords:
-
- masers;
- techniques: interferometric;
- astrometry;
- stars: AGB and post-AGB;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- To appear in the proceedings of the IAU Symposium 336: Astrophysical Masers: Unlocking the Mysteries of the Universe (4-8 September 2017, Cagliari, Italy) - IAU Proceedings Series, eds. A. Tarchi, M. J. Reid, and P. Castangia