Wide-Angle-Tail (WAT) Radio Sources

We review the properties of Wide-Angle-Tail (WAT) radio sources. The WAT sources are powerful, bent typically associated with dominant galaxy in a cluster or group. For purpose this review, we define morphology WATs as (1) sudden jet-tail transition, (2) overall bending tails to one side, and (3) non-parallel tails. mechanism for rapid transition is uncertain but it seems occur near from host ISM ICM. may make jets easier bend. narrow range luminosity can be understood if there minimum required allow propagate undisturbed tens kpc maximum jet disruption act. hosted by brightest galaxies clusters which currently merging. Thus, used tracers merging clusters. produces large-scale bulk motions ICM provide sufficient ram pressure bend jets. suggest that although Lorentz force not WATs, relevant other sources, e.g., protostellar