What bends wide-angle tailed radio sources

The authors discuss the mechanism responsible for bending WAT sources. The actual bending of the radio tails results from an interaction between the intracluster medium (ICM) and the extended radio plasma. Pressure gradients within the ICM will distort the plasma flow from linearity. Such pressure gradients could be seen as asymmetries in the X-ray emission produced by the hot cluster gas. Unlike the large-scale structure, the inner X-ray emission has an anisotropic, egg-shape near the cD with the excess between the radio tails. The origin of this gas anisotropy and its implications for the bending of the 3C465 tails are briefly considered using four models. (Auth.)