The distances and associated properties of faint radio sources

Details The distances and associated properties of faint radio sources The distances and associated properties of faint radio sources

Oct 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985mnras.216..641p&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 216, Oct. 1, 1985, p. 641-661. Research supported by Ca

Astronomy and Astrophysics

Astronomy

3

Astronomical Spectroscopy, Distance, Extragalactic Radio Sources, Luminosity, Radio Galaxies, Red Shift, Color-Magnitude Diagram, Galactic Clusters, Galactic Structure, Infrared Photometry, Radiant Flux Density

Scientific paper

In order to quantify the properties of the radio sources found in samples with low flux densities, medium-resolution spectra of the optical counterparts of nine sources from the 5C6 radio survey and infrared photometry for four of these objects are obtained. The redshifts of the sources indicate that they are predominantly of intermediate radio luminosity. The linear sizes of the 5C sources are significantly smaller than those of the more powerful 3C sources. The 5C radio galaxies lack strong emission lines, but have absolute magnitudes and colors that are indistinguishable from those of 3C radio galaxies. An apparent supercluster comprising three sources, at a redshift of z = 0.21, is identified. The relevance of these results to models of the epoch-dependent radio luminosity function is discussed, and it is shown that the 5C sources lie closer to us than many of the available models predict.

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