A Comparison of the Structures of 3CR Quasars and Blank Field Radio Sources

  • F. N. Owen
  • J. J. Puschell
  • R. A. Laing
Chapter
Part of the International Astronomical Union / Union Astronomique Internationale book series (IAUS, volume 97)

Abstract

The purpose of this communication is to update our knowledge of the radio structural properties of quasars and blank field radio sources (blank field ≡ any radio source without an identification on the Palomar Sky Survey prints). The quasar sample consists of all sources (25) with angular sizes greater than 10 arcsec in the list of Jodrell Bank quasars observed by Owen, Porcas and Neff (1978). The blank fields consist of 16 3CR sources also with structures >10 arcsec based on Cambridge 5 km telescope observations. The sources were selected in low-frequency surveys; their emission at v < 1 GHz is dominated by extended components with steep spectra. Thus, both samples should be oriented randomly in space except for a slight bias to be in the plane of the sky.

Keywords

Radio Source Central Component Astronomy Observatory Optical Identification Angular Size 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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References

  1. Longair, M.S. (1975) M.N.R.A.S. 173, 309.ADSGoogle Scholar
  2. Owen, F. N., Porcas, R. W., and Neff, S. G. (1978) A.J. 83, 1009.ADSCrossRefGoogle Scholar
  3. Potash, R. I. and Wardle, J. F. C. (1980) Ap.J. Letters 239, L42.CrossRefGoogle Scholar

Copyright information

© IAU 1982

Authors and Affiliations

  • F. N. Owen
    • 1
  • J. J. Puschell
    • 1
  • R. A. Laing
    • 1
  1. 1.National Radio Astronomy ObservatoryUSA

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