EMISSION-LINE PROPERTIES OF 3CR RADIO GALAXIES .2. VELOCITY-FIELDS INTHE EXTENDED EMISSION-LINES

We analyze long-slit spectra of 30 3CR and 1 Jy class radio galaxies t o derive the velocity fields in the extended emission-line regions. Am plitudes of 1000 km s(-1) or more are found in several high-redshift o bjects. Complex motions are seen in the emission-line nebulae of sever al galaxies, while others have kinematics consistent with simple rotat ion. The velocity widths of the extranuclear gas are often large, part icularly in regions of high shearing motions. While a wide range of am plitude and structure is seen in the velocity curves, a few trends are apparent both within this sample and when comparing this sample to lo w-redshift radio galaxies. The amplitudes at high redshift are on aver age higher than those seen in the local samples. Our survey also revea ls a number of systems with fully detached emission-line regions with velocity differences of several hundred km s(-1). At present it is unc lear if these differences reflect a change with cosmic time or if they reflect the luminosity bias inherent in the 3CR and other flux-limite d samples. These issues will be examined when we compare our results w ith similar data on low-redshift radio galaxies in Paper III.