Parsec-scale structures of radio galaxies in the 2-Jy sample

In this paper we present the results of VLBI observations of six radio gala xies belonging to the 2-Jy sample. The selected objects are 3C17, PKS 0620- 52, PKS 0625-35, PKS 1318-43, PKS 1333-33 and 3C317. The first is a high po wer radio galaxy and the remainder are all low power objects. Our observati ons were carried out with a set of different arrays and frequencies, and co ver a range of resolutions from a few mas to a few tens of mas. Parsec-scale images are presented and discussed in the light of unification for radio loud galaxies. Estimates for the intrinsic plasma speeds in thes e objects in the proximity of the parsecscale core and their orientation to the line of sight are in agreement with the predictions from unified model s and with their optical and X-ray properties. We will use H-o = 50 kms(-1) Mpc(-1), q(o) = 0 and S proportional to v(-alp ha) throughout the paper.