Radio Sources in Clusters

Radio sources occur more often in cooling flow clusters than non-cooling flows: 70% of cooling flow clusters contain central cD galaxies with associated radio sources, and 20% of non-cooling flow clusters have radio-bright central galaxies (Burns 1990).
This is probably no accident: the cooling gas feeds the AGN?

Radio sources occur more often in cooling flow clusters than non-cooling flows: 70% of cooling flow clusters contain central cD galaxies with associated radio sources, and 20% of non-cooling flow clusters have radio-bright central galaxies (Burns 1990).