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Cosmological Evolution in Radio Galaxies

Nature volume 233, pages 402–403 (1971)Cite this article

Abstract

ROWAN-ROBINSON has presented evidence that radio galaxies exhibit remarkably strong evolutionary effects with cosmological epoch1. Examination of his evidence, however, indicates that, although an evolutionary effect may indeed be present, no reliable estimate of the time scale involved can yet be made in the way he proposes. This is because (i) the mean value of ν/νmax (defined by Rowan-Robinson) is very sensitive to changes in the limiting magnitude assumed for the sample, and (ii) the redshift corrections (K-corrections) which have to be applied to the apparent magnitudes of the fainter radio galaxies (for which the evolutionary effects appear to be strongest) are not sufficiently well known. These effects will now be considered in turn.

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Authors and Affiliations

  1. Mullard Radio Astronomy Observatory, Cavendish Laboratory, Free School Lane, Cambridge

    CRAIG D. MACKAY

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  1. CRAIG D. MACKAY
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MACKAY, C. Cosmological Evolution in Radio Galaxies. Nature 233, 402–403 (1971). https://doi.org/10.1038/233402a0

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