Published in

Oxford University Press (OUP), Monthly Notices of the Royal Astronomical Society, 2(368), p. 609-618

DOI: 10.1111/j.1365-2966.2006.10155.x

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Jet Speeds in Wide Angle Tailed Radio Galaxies

Journal article published in 2006 by Nazirah N. Jetha, Martin J. Hardcastle ORCID, Irini Sakelliou
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

We present a sample of 30 wide angle tailed radio galaxies (WATs) that we use to constrain the jet speeds in these sources. We measure the distribution of jet-sidedness ratios for the sample, and assuming that the jets are beamed, jet speeds in the range (0.3-0.7)c are obtained. Whilst the core prominence of the sample, which ought to be a reliable indicator of beaming, shows little correlation with the jet-sidedness, we argue that due to the peculiar nature of WATs core-prominence is unlikely to be a good indicator of beaming in these sources. We further show that if the jets are fast and light, then the galaxy speeds required to bend jets into C-shapes such as those seen in 0647+693 are reasonable for a galaxy in a merging or recently merged cluster. Comment: 10 pages, 18 figures, accepted for publication in MNRAS