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The Milliarcsecond Core of 3C147 at 6 cm

Published online by Cambridge University Press:  04 August 2017

E. Preuss ,
W. Alef ,
N. Whyborn ,
P.N. Wilkinson  and
K.I. Kellermann
E. Preuss
Affiliation:
Max-Planck-Institut für Radioastronomie, Bonn, FRG
W. Alef
Affiliation:
Max-Planck-Institut für Radioastronomie, Bonn, FRG
N. Whyborn
Affiliation:
Nuffield Radio Astronomy Laboratory, Jodrell Bank, Cheshire, UK
P.N. Wilkinson
Affiliation:
Nuffield Radio Astronomy Laboratory, Jodrell Bank, Cheshire, UK
K.I. Kellermann
Affiliation:
National Radio Astronomy Observatory, Green Bank, W. Va., USA

Extract

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3C147 is a compact (≲1″), steep spectrum radio source identified with a quasar at z = 0.545 (0″.001 = 7.4 pc; c/Ho = 6000 Mpc and qo = 0.5). The radio structure shown by VLBI observations at 18 cm (Readhead & Wilkinson, 1980; Simon et al., this volume), at 50 cm (Wilkinson et al., 1977), and at 90 cm (Simon et al., 1980 and 1983) shows a bright ‘core’ (60 pc at one end of a ‘jet’ ~0″.2 (1.5 kpc) in length oriented in p.a. ~ −130°. In this sense 3C147 is typical of the one-sided ‘core-jet’ structures commonly found in the centres of other extragalactic radio sources. However, MERLIN observations at 6 cm (Wilkinson, this vol.) and VLA observations at 2 cm (Crane & Kellermann, unpubl.; Readhead et al., 1980) show a larger elongated feature extending ~0″.5 (3.7 kpc) to the North East of the bright core in p.a. ~25° or on the opposite side to the 0″.2 jet.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 110: VLBI and Compact Radio Sources , 1984 , pp. 29 - 30
Copyright
Copyright © Reidel 1984 

References

Preuss, E. et al.: 1982, IAU Symposium No. 97, p. 289 CrossRefGoogle Scholar
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Readhead, A. et al.: 1980, Astrophys. J. 237, L55 Google Scholar
Simon, R. et al.: 1980, Astrophysical J. 236, 707 Google Scholar
Simon, R. et al.: 1983, Nature 302, 487 Google Scholar
Wilkinson, P. et al.: 1977, Nature 269, 764 Google Scholar