Observed Redshift Distributions and Cosmological Evolution of Radio Sources

Details Observed Redshift Distributions and Cosmological Evolution of Radio Sources Observed Redshift Distributions and Cosmological Evolution of Radio Sources

1998-03-04

arxiv.org/abs/astro-ph/9803034v1

'Observational Cosmology with the New Radio Surveys', eds. Bremer et al., Kluwer, 1998, p191-194

Astronomy and Astrophysics

Astrophysics

4 pages including 2 Postscript figures, uses crckapb10.sty

Scientific paper

It is shown that the new observed redshift distributions of various flux-limited samples of radio sources in general are consistent with the predictions of two basic evolutionary models published by Condon (1984) and Dunlop and Peacock (1990), i.e. none of them can be rejected at the confidence level of about 95 per cent. However, the models allowing a free-form evolution and suggesting both density and luminosity evolution are more consistent with the observational data at lower redshifts, while the 'pure luminosity evolution' model fits better the data at higher redshifts. This leads to a suspicion that the same evolution governing all radio sources, suggested by Condon (1984), might not be the case.

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