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M. Harvanek, J.T. Stocke, E. Ellingson (Univ. of Colorado), G. Rhee (UNLV)
Optical and radio images have been gathered for a sample of 3CR radio galaxies with 0.15 < z < 0.65 and |bII| \ge 15\circ. Total, host, and nuclear magnitudes and colors have been extracted from the optical images. The richness of the clustering environment around the objects has also been quantified by calculating the amplitude of the galaxy-galaxy spatial covariance function, Bgg, from the optical images. Radio structure parameters such as largest physical size, projected bending angle, length asymmetry and hot spot placement have been measured from the highest quality radio maps available which include a number of new VLA maps obtained for this project. Correlations between the optical properties, the clustering environment and the radio structure parameters are examined and their implications are discussed. The properties of these radio galaxies are also compared to those taken from an existing large sample of quasars. The results of this comparison provide an important test between the ``unified'' and the ``evolutionary'' hypotheses for relating powerful radio galaxies to quasars.