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Extreme jet distortions in low-z radio galaxies

Published online by Cambridge University Press:  03 March 2020

Mark Birkinshaw ,
Josie Rawes  and
Diana Worrall
Mark Birkinshaw
Affiliation:
HH Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, U.K. email: Mark.Birkinshaw@bristol.ac.uk
Josie Rawes
Affiliation:
HH Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, U.K. email: J.Rawes@bristol.ac.uk
Diana Worrall
Affiliation:
HH Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, U.K. email: D.Worrall@bristol.ac.uk
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Abstract

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Jets often display bends and knots at which the flows change character. Extreme distortions have implications for the nature of jet flows and their interactions. We present the results of three radio mapping campaigns. The distortion of 3CRR radio galaxy NGC 7385 is caused by a collision with a foreground magnetised gas cloud which causes Faraday rotation and free-free absorption, and is triggered into star formation. For NGC 6109 the distortion is more extreme, creating a ring-shaped structure, but no deflector can be identified in cold or hot gas. Similar distortions in NGC 7016 are apparently associated with an X-ray gas cavity, and the adjacent NGC 7018 shows filaments drawn out beyond 100 kpc. Encounters with substructures in low-density, magnetised, intergalactic gas are likely causes of many of these features.

Keywords

Galaxies:activegalaxies:jetsradio continuum:galaxiesintergalactic medium
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium A30: Astronomy in Focus XXX , August 2018 , pp. 61 - 65
Copyright
© International Astronomical Union 2020

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