RADIO-SOURCE STRUCTURE, CLUSTERS OF GALAXIES AND COMPLEX SOURCES

Correlations between the properties of extragalactic radio sources and membership of clusters of galaxies are examined for a complete sample of radio galaxies. It is found that there is no difference in the overall sizes of double radio sources in clusters and those in the general field. There is no preference for complex radio sources to be associated with clusters of galaxies. Complex structure is observed only in low power sources, and such sources are larger on average than other types. No evidence is found for any difference in properties between radio sources in clusters and those in the general field. It is inferred that there is no evidence from the radio data for increased ambient gas density in clusters of galaxies. © 1974 Royal Astronomical Society.