The radio emission of interacting galaxies

Peculiar radio morphologies are not a general property of interacting galaxies, but in the few cases where an unusual radio morphology has been seen, gravitational interaction is not always the most attractive explanation. The authors present here VLA observations of the radio structure in three galaxies where the peculiar radio morphology is well established. In at least one of these (NGC 4438) the radio structure is better interpreted in terms of interaction with a diffuse intergalactic gas rather than in terms of a galaxy-galaxy interaction. (Auth.)