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The Evolution of Extragalactic Radio Sources

Published online by Cambridge University Press:  25 May 2016

A. C. S. Readhead ,
T. J. Pearson ,
G. B. Taylor  and
P. N. Wilkinson
A. C. S. Readhead
Affiliation:
1 California Institute of Technology
T. J. Pearson
Affiliation:
1 California Institute of Technology
G. B. Taylor
Affiliation:
2 National Radio Astronomy Observatory
P. N. Wilkinson
Affiliation:
3 University of Manchester

Extract

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A series of VLBI surveys of complete samples of radio sources selected at 5 GHz (Pearson & Readhead 1988, hereafter PR; Xu et al. 1995 and references therein) has revealed that ≃ 10% of the objects are “Compact Symmetric Objects” (CSOs), in which high-luminosity radio emission regions are seen on both sides of the center of activity on scales less than one kiloparsec (Phillips & Mutel 1982; Readhead et al. 1984; Conway et al. 1992; Wilkinson et al. 1994). In order to be sure that an object is a CSO, either the center of activity must be pinpointed (Taylor et al. 1996) or compelling morphological evidence of symmetric structure must be found.

Type
Properties of Radio Sources
Information
Symposium - International Astronomical Union , Volume 175: Extragalactic Radio Sources , 1996 , pp. 88 - 89
Copyright
Copyright © Kluwer 1996 

References

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