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Astron. Astrophys. 363, 84-92 (2000)


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

T. Venturi 1, R. Morganti 2, T. Tzioumis 3 and J. Reynolds 3

1 Istituto di Radioastronomia del CNR, Via Gobetti 101, 40129 Bologna, Italy
2 Netherlands Foundation for Radio Astronomy, Postbus 2, AA 7990 Dwingeloo, The Netherlands
3 ATNF-CSIRO, P.O. Box 76, Epping, NSW 2121, Australia

Received 4 August 2000 / Accepted 25 August 2000

Abstract

In this paper we present the results of VLBI observations of six radio galaxies 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 power radio galaxy and the remainder are all low power objects. Our observations were carried out with a set of different arrays and frequencies, and cover 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 these objects in the proximity of the parsec-scale core and their orientation to the line of sight are in agreement with the predictions from unified models and with their optical and X-ray properties.

We will use Ho = 50 km s-1Mpc-1, qo = 0 and [FORMULA] throughout the paper.

Key words: galaxies: general – galaxies: quasars: general – galaxies: structure – radio continuum: galaxies

Send offprint requests to: T. Venturi (tventuri@ira.bo.cnr.it)

© European Southern Observatory (ESO) 2000

Online publication: December 5, 2000

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