Jet Speeds in Wide Angle Tailed Radio Galaxies

Details Jet Speeds in Wide Angle Tailed Radio Galaxies Jet Speeds in Wide Angle Tailed Radio Galaxies

2006-02-07

arxiv.org/abs/astro-ph/0602162v1

Mon.Not.Roy.Astron.Soc.368:609-618,2006

Astronomy and Astrophysics

Astrophysics

10 pages, 18 figures, accepted for publication in MNRAS

Scientific paper

10.1111/j.1365-2966.2006.10155.x

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.

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