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Number Counts and Spectral Distribution of Radio Sources at Centimeter Wavelengths

Published online by Cambridge University Press:  14 August 2015

I. I. K. Pauliny-Toth ,
K. I. Kellermann  and
M. M. Davis
I. I. K. Pauliny-Toth
Affiliation:
National Radio Astronomy Observatory,∗∗ Green Bank, West Va., U.S.A.
K. I. Kellermann
Affiliation:
National Radio Astronomy Observatory,∗∗ Green Bank, West Va., U.S.A.
M. M. Davis
Affiliation:
National Radio Astronomy Observatory,∗∗ Green Bank, West Va., U.S.A.

Abstract

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The results of a survey of selected regions of sky made at a frequency of 5 GHz, and of measurements of the spectral index distributions for sources selected from low frequency surveys are presented. The source counts and spectral distribution at 5 GHz are in excellent agreement with those expected from surveys made at lower frequencies. There is no significant dependence of the spectral distribution on flux density in any of the surveys we have investigated, implying either a low redshift for the sources, or a systematic change in their properties with redshift.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 44: External Galaxies and Quasi-Stellar Objects , 1972 , pp. 444 - 452
Copyright
Copyright © Reidel 1972 

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