Bow shocks in water fountain jets

Ann Njeri Ngendo; Daniel Tafoya; Gabor Orosz; Hiroshi Imai; Jos\'e F. G\'omez; Jos\'e M. Torrelles; Ross A. Burns

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arxiv 1804.02672 v1 pith:MXON4DCE submitted 2018-04-08 astro-ph.SR

Bow shocks in water fountain jets

Gabor Orosz , Jos\'e F. G\'omez , Daniel Tafoya , Hiroshi Imai , Jos\'e M. Torrelles , Ann Njeri Ngendo , Ross A. Burns This is my paper

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keywords episodicirasjetsmasershockswateraccretionanalysis

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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.

Bow shocks in water fountain jets

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