On the angular size-redshift test for double radio sources

Details On the angular size-redshift test for double radio sources On the angular size-redshift test for double radio sources

Mar 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977ap%26ss..47...25b&link_type=abstract

Astrophysics and Space Science, vol. 47, Mar. 1977, p. 25-30.

Astronomy and Astrophysics

Astronomy

1

Radio Sources (Astronomy), Red Shift, Size Determination, Astronomical Models, Cosmology, Galactic Radiation, Quasars, Relativistic Theory

Scientific paper

The origin of the discrepancy between the observed redshift dependence of the angular size of double radio sources and the relation expected for constant-diameter objects in homogeneous relativistic cosmologies is reconsidered. A correlation between absolute magnitude and projected linear separation for the sources could account for this discrepancy by observational selection without requiring cosmological evolution of the entire source population. It is concluded that it is premature to use the angular size-redshift test as support either for astrophysical models of double-radio-source evolution or for particular cosmological models.

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