A study of a representative sample of flat-spectrum radio sources

Details A study of a representative sample of flat-spectrum radio sources A study of a representative sample of flat-spectrum radio sources

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.205..793w&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 205, Nov. 1983, p. 793-807.

Astronomy and Astrophysics

Astronomy

36

Infrared Astronomy, Radio Sources (Astronomy), Active Galaxies, Bl Lacertae Objects, Classifications, Quasars, Radio Galaxies, Visible Spectrum

Scientific paper

The authors present near-infrared measurements made with the Anglo-Australian telescope of a representative sample of 47 compact objects drawn from a complete sample of 64 strong flat-spectrum radio sources. Optical spectra have been obtained for all the objects in the complete sample, allowing the authors to investigate the dependence of colour on the various identification classes (QSO, BL Lac object, active galaxy, empty field) and on redshift for the QSOs and active galaxies. Infrared counterparts were also found for six of the empty fields, and the authors discuss the nature of these objects. The data indicate that the majority of them are QSOs, although a few may be BL Lac objects.

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