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Aims. Narrow-angle tailed (NAT) sources in clusters of galaxies can show onthe large scale very narrow tails that are unresolved even at arcsecondresolution. These sources could therefore be classified as one-sided jets. Theaim of this paper is to gain new insight into the structure of these sources,and establish whether they are genuine one-sided objects, or if they aretwo-sided sources. Methods. We observed a sample of apparently one-sided NATsources at subarcsecond resolution to obtain detailed information on theirstructure in the nuclear regions of radio galaxies. Results. Most radiogalaxies are found to show two-sided jets with sharp bends, and therefore thesources are similar to the more classical NATs, which are affected by strongprojection effects.

Narrow head-tail radio galaxies at very high resolution