Optical identification of a subsample of steep spectrum radio sources from the RC catalog using the 6-m SAO Telescope: Optical observations

Details Optical identification of a subsample of steep spectrum radio sources from the RC catalog using the 6-m SAO Telescope: Optical observations Optical identification of a subsample of steep spectrum radio sources from the RC catalog using the 6-m SAO Telescope: Optical observations

Sep 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995arep...39..543k&link_type=abstract

Astronomy Reports, Volume 39, Issue 5, September 1995, pp.543-558

Astronomy and Astrophysics

Astronomy

5

Scientific paper

Results are presented of deep identifications of 40 steep spectrum radio sources detected on RATAN-600 in an area ~100^deg^ in the "Kholod" experiment and then studied using the VLA. Candidates for optical objects responsible for the radio emission were found for 32 sources. Estimates of photometric redshifts are given for FRII objects, which dominate in the sample considered, using an earlier constructed Hubble diagram. The mean photometric redshift is equal to 2. As for closer objects of this class and at large redshifts have radio luminosities close to those in the optical. We conclude that, with the exception of a few quasars and objects with ill-defined morphology that were in the sample by chance, a large fraction of the radio sources are associated either with gE galaxies (by analogy with known nearby objects) or with galaxies of an unknown nature. Possibilities for future study of distant objects of this class are discussed.

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