Dependence of Faraday Effects on Radio Luminosity and Redshift

Details Dependence of Faraday Effects on Radio Luminosity and Redshift Dependence of Faraday Effects on Radio Luminosity and Redshift

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aujph..52..147u&link_type=abstract

Australian Journal of Physics, vol. 52, p. 147

Astronomy and Astrophysics

Astronomy

1

Faraday Effect, Luminosity, Red Shift, Extragalactic Radio Sources, Radio Astronomy, Cosmology, Galactic Evolution, Depolarization

Scientific paper

Quantitative estimates are provided for the influence of luminosity selection effects present in a bright source sample on the observed correlation of the depolarization rate lambda1/2 with redshift z. It is shown that the observed correlation is partly intrinsic and partly due to luminosity effects. More specifically, we find that approximately 46% of the observed lambda1/2 correlation with z can be attributed to strong luminosity selection effects in the sample. This shows that a significant fraction (approximately 54%) of the observed correlation is cosmological in origin. It is concluded that there is a cosmological evolution of lambda1/2, over and above that resulting from luminosity selection effects, which may be related to the epoch dependent properties of the ambient medium through which the radio source components propagate.

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