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The Flux Density-Angular Size Distribution for Extragalactic Radio Sources

Published online by Cambridge University Press:  14 August 2015

G. Swarup  and
C. R. Subrahmanya
G. Swarup
Affiliation:
Radio Astronomy Center, Tata Institute of Fundamental Research, P.O. Box 8, Ootacamund, 643001, India
C. R. Subrahmanya
Affiliation:
Radio Astronomy Center, Tata Institute of Fundamental Research, P.O. Box 8, Ootacamund, 643001, India

Extract

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The median values of angular sizes of weak extragalactic radio sources, the flux densities of which lie in the range of about 0. 3 to 5 Jy at 327 MHz, have been determined for a new sample of 119 sources observed during 1973-74, and agree well with the value of about 10 arc sec determined earlier by Swarup (1975). For 8 different flux density ranges, the angular size distribution for the All-sky, 3CR and Ooty radio sources have been compared with theoretical predictions based on the evolutionary model by Kapahi (1975) and show a remarkable agreement with his model except that the best fit is found for a linear size evolution proportional to (l+z)−1.

Type
III. Angular Diameter-Redshift and Flux Density Tests
Information
Symposium - International Astronomical Union , Volume 74: Radio Astronomy and Cosmology , 1977 , pp. 125 - 132
Copyright
Copyright © Reidel 1977 

References

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