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The Caltech-Jodrell Bank VLBI Surveys

Published online by Cambridge University Press:  12 April 2016

T.J. Pearson ,
I.W.A. Browne ,
D.R. Henstock ,
A.G. Polatidis ,
A.C.S. Readhead ,
G.B. Taylor ,
D.D. Thakkar ,
R.C. Vermeulen ,
P.N. Wilkinson  and
W. Xu
T.J. Pearson
Affiliation:
California Institute of Technology and University of Manchester, Jodrell Bank California Institute of Technology, 105-24, Pasadena, California 91125, USA
I.W.A. Browne
Affiliation:
California Institute of Technology and University of Manchester, Jodrell Bank University of Manchester, Nuffield Radio Astronomy Laboratories, Jodrell Bank, Macclesfield, Cheshire SK11 9DL, UK
D.R. Henstock
Affiliation:
California Institute of Technology and University of Manchester, Jodrell Bank University of Manchester, Nuffield Radio Astronomy Laboratories, Jodrell Bank, Macclesfield, Cheshire SK11 9DL, UK
A.G. Polatidis
Affiliation:
California Institute of Technology and University of Manchester, Jodrell Bank Onsala Space Observatory and JIVE, Chalmers Technical University, Onsala, S-43992, Sweden
A.C.S. Readhead
Affiliation:
California Institute of Technology and University of Manchester, Jodrell Bank California Institute of Technology, 105-24, Pasadena, California 91125, USA
G.B. Taylor
Affiliation:
California Institute of Technology and University of Manchester, Jodrell Bank National Radio Astronomy Observatory, Socorro, New Mexico 87801, USA
D.D. Thakkar
Affiliation:
California Institute of Technology and University of Manchester, Jodrell Bank Oracle Corporation, Redwood Shores, California 94404, USA
R.C. Vermeulen
Affiliation:
California Institute of Technology and University of Manchester, Jodrell Bank Netherlands Foundation for Research in Astronomy, Dwingeloo, The Netherlands
P.N. Wilkinson
Affiliation:
California Institute of Technology and University of Manchester, Jodrell Bank University of Manchester, Nuffield Radio Astronomy Laboratories, Jodrell Bank, Macclesfield, Cheshire SK11 9DL, UK
W. Xu
Affiliation:
California Institute of Technology and University of Manchester, Jodrell Bank IPAC, California Institute of Technology, 100-22, Pasadena, California 91125, USA

Abstract

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The Caltech-Jodrell Bank VLBI surveys of bright extragalactic radio sources north of declination 35° were carried out between 1990 and 1995 using the Mark-II system, achieving images with a resolution of about 1 mas at 5 GHz. The CJl survey (together with the older “PR” survey) includes 200 objects with 5 GHz flux density greater than 0.7 Jy; the CJ2 survey includes 193 flat-spectrum sources with 5 GHz flux density greater than 0.35 Jy; and we have defined a complete flux-density limited sample, CJF, of 293 flat-spectrum sources stronger than 0.35 Jy. We summarize the definition of the samples and the VLBI, VLA, MERLIN, and optical observations, and present some highlights of the astrophysical results. These include: (1) superluminal motion and cosmology; (2) morphology and evolution of the “compact symmetric objects” (CSOs); (3) two-sided motion in some CSOs; (4) the angular-size-redshift diagram; (5) misalignment of parsec-scale and kiloparsec-scale jets.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 164: Radio Emission from Galactic and Extragalactic Compact Sources , 1998 , pp. 17 - 24
Copyright
Copyright © Astronomical Society of the Pacific 1998

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